Kim Lefmann
Professor
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Eliminating line of sight in elliptic guides using gravitational curving
Klenø, K. H., Willendrup, P. K., Lefmann, Kim & Knudsen, E., 1 Apr 2011, In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 634, Suppl. 1, p. S100-S103Research output: Contribution to journal › Conference article › Research › peer-review
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Magnetic field-induced closure of the spin excitation gap near optimal doping in La2-xSrxCuO4: Proceedings of the International Workshop on Neutron Applications on Strongly Correlated Electron Systems 2011 (NASCES11)
Christensen ...[et al.], N. B., Chang, J., Razzoli, E. & Lefmann, Kim, 20 Dec 2011, In: Journal of the Physical Society of Japan. 80, Suppl. B, p. SB030 4 p.Research output: Contribution to journal › Conference article › Research › peer-review
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Temperature dependence of the magnetization of canted spin structures
Jacobsen, Henrik, Lefmann, Kim, Brok, E., Frandsen, C. & Morup, S., 1 Sep 2012, In: Journal of Magnetism and Magnetic Materials. 324, 19, p. 3218-3222 4 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Competing superconducting and magnetic order parameters and field-induced magnetism in electron-doped Ba(Fe1-xCox)(2)As-2
Larsen, J., Uranga, B. M., Stieper, G., fvh927, fvh927, Bernhard, C., Wolf, T., Lefmann, Kim, Andersen, Brian Møller & Niedermayer, C., 13 Jan 2015, In: Physical Review B. 91, 2, 10 p., 025404.Research output: Contribution to journal › Journal article › Research › peer-review
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Constraining neutron guide optimizations with phase-space considerations
Bertelsen, M. & Lefmann, Kim, 11 Sep 2016, In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 830, p. 313-324Research output: Contribution to journal › Journal article › Research › peer-review
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Chemical tunnel-splitting-engineering in a dysprosium-based molecular nanomagnet
Sørensen, M. A., Hansen, U. B., Perfetti, M., Pedersen, K. S., Bartolome, E., Simeoni, G. G., Mutka, H., Rols, S., Jeong, M., Zivkovic, I., Retuerto Millan, M., Arauzo, A., Bartolome, J., Piligkos, Stergios, Weihe, Høgni, Doerrer, L. H., van Slageren, J., Rønnow, H. M., Lefmann, Kim & Bendix, Jesper, 1 Dec 2018, In: Nature Communications. 9, 9 p., 1292.Research output: Contribution to journal › Journal article › Research › peer-review
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VESPA: The vibrational spectrometer for the European Spallation Source
Fedrigo, A., Colognesi, D., Bertelsen, M., Hartl, M., Lefmann, Kim, Deen, P. P., Strobl, M., Grazzi, F. & Zoppi, M., 2 Jun 2016, In: Review of Scientific Instruments. 87, 6, 065101.Research output: Contribution to journal › Journal article › Research › peer-review
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Field-induced interplanar magnetic correlations in the high-temperature superconductor La1.88Sr0.12CuO4
Rømer, A. T., Ray, P. J., Jacobsen, Henrik, Udby, L., Andersen, Brian Møller, Bertelsen, M., fvh927, fvh927, Christensen, N. B., Toft-Petersen, R., Skoulatos, M., Laver, M., Schneidewind, A., Link, P., Oda, M., Ido, M., Nomono, N. & Lefmann, Kim, 11 May 2015, In: Physical Review B. 91, 174507.Research output: Contribution to journal › Journal article › Research › peer-review
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Realizing the full potential of a RITA spectrometer
Lefmann, Kim, Abrahamsen, A. B., Bahl, C. R. H., Christensen, N. B., Jacobsen, H. S., Larsen, T. L., Häflinger, P., Filges, U. & Rønnow, H. M., 27 Nov 2006, In: Physica B: Condensed Matter. 385-386, 2, p. 1083-1085Research output: Contribution to journal › Conference article › Research › peer-review
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Neutron guide shielding for the BIFROST spectrometer at ESS
Mantulnikovs, K., Bertelsen, M., Cooper-jensen, C. P., Lefmann, Kim & Klinkby, E. B., 1 Sep 2016, In: Journal of Physics - Conference Series. 746, 1, 012027.Research output: Contribution to journal › Conference article › Research › peer-review
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Magnetic properties of nano-scale hematite, α-Fe2O3, studied by time-of-flight inelastic neutron spectroscopy
Hill, A. H., Jacobsen, Henrik, Ross Stewart, J., Jiao, F., Jensen, N. P., fvh927, fvh927, Mutka, H., Seydel, T., Harrison, A. & Lefmann, Kim, 25 Jan 2014, In: Journal of Chemical Physics. 140, 9 p., 044709.Research output: Contribution to journal › Journal article › Research › peer-review
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Simulations of chopper jitter at the LET neutron spectrometer at the ISIS TS2
Klenø, K. H., Lefmann, Kim, Willendrup, P. K., Christiansen, P. & Bewley, R., 9 Apr 2014, In: Journal of Neutron Research. 17, 2, p. 77-85Research output: Contribution to journal › Journal article › Research › peer-review
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CAMEA ESS - The Continuous Angle Multi-Energy Analysis Indirect Geometry Spectrometer for the European Spallation Source
Freeman, P. G., Birk, J. O., Marko, M., Bertelsen, M., Christensen, N. B., Lefmann, Kim, Jacobsen, J., Niedermayer, C., Juranyi, F. & Ronnow, H. M., 23 Jan 2015, In: Journal of Physics: Conference Series (Online). 83, 7 p., 03005.Research output: Contribution to journal › Conference article › Research › peer-review
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Polarized neutron powder diffraction studies of antiferromagnetic order in bulk and nanoparticle NiO
Brok, E., Lefmann, Kim, Deen, P. P., Lebech, B., Jacobsen, Henrik, G., N. & Frandsen, C., 26 Jan 2015, In: Physical Review B. 91, 014431.Research output: Contribution to journal › Journal article › Research › peer-review
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Dynamical correlation functions of the S=½ nearest-neighbor and Haldane-Shastry Heisenberg antiferromagnetic chains in zero and applied fields
Lefmann, Kim & Rischel, C., 1 Sep 1996, In: Physical Review B. 54, p. 6340-6350Research output: Contribution to journal › Journal article › Research › peer-review
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kernemagnetisk orden i sølv, verden 3. koldeste forsøg ( Nuclear magnetic order in silver the 3rd coldest experiment ever)
Lefmann, Kim & Rasmussen, Finn Berg, 1 Mar 1996, In: Kvant. 8Research output: Contribution to journal › Journal article › Communication
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The monochromatic imaging mode of a RITA-type neutron spectrometer
Bahl, C. R. H., Andersen, P., Klausen, S. N. & Lefmann, Kim, 1 Dec 2004, In: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 228, 4, p. 667-681Research output: Contribution to journal › Journal article › Research › peer-review
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Nanocriticality in the magnetic phase transition of CoO nanoparticles
Kamminga, M. E., Birk, J. O., Hjøllum, J., Jacobsen, Henrik, Lass, J., Koch, T. L., Christensen, N. B., Niedermayer, C., Keller, L., Kuhn, L. T., Ulrikkeholm, E. T., Brok, E., Frandsen, C. & Lefmann, Kim, 2023, In: Physical Review B. 107, 6, 6 p., 064424.Research output: Contribution to journal › Journal article › Research › peer-review
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Exact diagonalization study of the Hubbard-parametrized four-spin ring exchange model on a square lattice
Larsen, C. B., Rømer, A. T., Janas, S., Treue, F., Mønsted, B., Shaik, N. E., Rønnow, H. M. & Lefmann, Kim, 2019, In: Physical Review B. 99, 5, 12 p., 054432.Research output: Contribution to journal › Journal article › Research › peer-review
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Neutron scattering cross section of the S=1/2 Heisenberg triangular antiferromagnet
Lefmann, Kim & Hedegård, Per, 1 Jul 1994, In: Physical Review B. Condensed Matter and Materials Physics. 50, 1047.Research output: Contribution to journal › Journal article › Research › peer-review
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Neutron Experiments on Antiferromagnetic Nuclear Order in Silver at Picokelvin Temperatures
Tuoriniemi, J. T., Nummila, K., Vuorinen, R. T., Lounasmaa, O. V., Metz, A., Siemensmayer, K., Steiner, M., Clausen, K. N., Lefmann, Kim & Rasmussen, Finn Berg, 30 Jun 1995, In: Physical Review Letters. 75, p. 3744-3747Research output: Contribution to journal › Journal article › Research
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Anomalous spin waves in the commensurate-incommensurate magnetic phase transition in LiNiPO4
Jensen, T. B. S., Christensen, N. B. & Lefmann, Kim, 2009, In: Physical Review B Condensed Matter. 79, 9, p. 092413Research output: Contribution to journal › Journal article › Research › peer-review
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McStas-model of the Delft SESANS
Knudsen, E., Udby, L., Willendrup, P. K., Lefmann, Kim & Bouwman, W. G., 1 Jun 2011, In: Physica B: Condensed Matter. 406, 12, p. 2361-2364Research output: Contribution to journal › Journal article › Research › peer-review
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High-field magnetic phase transitions and spin excitations in magnetoelectric LiNiPO4
Toft-Petersen, R., Jensen, Jens, Jensen, T. B. S., Andersen, N. H., Christensen, N. B., Niedermayer, C., Kenzelmann, M., Skoulatos, M., Le, M. D., Lefmann, Kim, Hansen, S. R., Li, J., Zarestky, J. L. & Vaknin, D., 2 Aug 2011, In: Physical Review B Condensed Matter. 84, 5, p. 054408 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Advanced simulations of x-ray beam propagation through CRL transfocators using ray-tracing and wavefront propagation methods
Baltser, J., Vickery, A., Feidenhans'l, Robert Krarup, Lefmann, Kim, Chubar, O., Snigirev, A. & Vaughan, G., 23 Sep 2011, In: Proceedings of SPIE. 8141, p. 814111Research output: Contribution to journal › Conference article › Research › peer-review
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Powder diffractometers at long-pulsed sources: Proceedings of the International Workshop on Neutron Applications on Strongly Correlated Electron Systems 2011 (NASCES11)
Sales, M., fvh927, fvh927, Lieutenant, K. & Lefmann, Kim, 20 Dec 2011, In: Journal of the Physical Society of Japan. 80, Suppl.B, p. SB018 4 p.Research output: Contribution to journal › Conference article › Research › peer-review
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HEIMDAL: A thermal neutron powder diffractometer with high and flexible resolution combined with SANS and neutron imaging - Designed for materials science studies at the European Spallation Source
fvh927, fvh927, Lefmann, Kim, Henry, P. F., Bertelsen, M., Schefer, J. & Christensen, M., 21 Aug 2016, In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 828, p. 229-241Research output: Contribution to journal › Journal article › Research › peer-review
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Solitonic lattice and Yukawa forces in the rare-earth orthoferrite TbFeO3
Artyukhin, S., Mostovoy, M., Jensen, N. P., Le, D., Prokes, K., de paula, V. G., Nunes Bordallo, Heloisa, Maljuk, A., Landsgesell, S., Ryll, H., Klemke, B., Paeckel, S., Kiefer, K., Lefmann, Kim, Kuhn, L. T. & Argyriou, D. N., 24 Jun 2012, In: Nature Materials. 11, 8, p. 694-699 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Simulation of a suite of generic long-pulse neutron instruments to optimize the time structure of the European Spallation Source
Lefmann, Kim, Klenø, K. H., Birk, J. O., Hansen, B. R., fvh927, fvh927, Knudsen, E., Lieutenant, K., von Moos, L., Sales, M., Willendrup, P. K. & Andersen, K. H., 2013, In: Review of Scientific Instruments. 84, 5, 9 p., 055106.Research output: Contribution to journal › Journal article › Research › peer-review
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Nature of the magnetic stripes in fully oxygenated La2CuO4+y
Ţuţueanu, A., Jacobsen, Henrik, Jensen Ray, P., fvh927, fvh927, Lăcătuşu, M., Tejsner, T. B., Grivel, J., Schmidt, W., Toft-petersen, R., Steffens, P., Boehm, M., Wells, B., Udby, L., Lefmann, Kim & Rømer, A. T., 2021, In: Physical Review B. 103, 4, 15 p., 045138.Research output: Contribution to journal › Journal article › Research › peer-review
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Structural characterization and magnetic properties of chromium jarosite KCr3(OD)6 (SO4)2
Janas, S., Sorensen, M. B., Andersen, A. B. A., Juelsholt, M., Boehm, M., Pedersen, K. S., Jensen, Kirsten Marie Ørnsbjerg, Lefmann, Kim & Nielsen, U. G., 21 Nov 2020, In: Physical Chemistry Chemical Physics. 22, 43, p. 25001-25010 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Distinct Nature of Static and Dynamic Magnetic Stripes in Cuprate Superconductors
Jacobsen, Henrik, fvh927, fvh927, Lacatusu, M. -., Romer, A. T., Bertelsen, M., Boehm, M., Toft-Petersen, R., Grivel, J. -., Emery, S. B., Udby, L., Wells, B. O. & Lefmann, Kim, 18 Jan 2018, In: Physical Review Letters. 120, 3, 5 p., 037003.Research output: Contribution to journal › Journal article › Research › peer-review
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Magnetic Anisotropy Switch: Easy Axis to Easy Plane Conversion and Vice Versa
Perfetti, M., Sørensen, M. A., Hansen, U. B., Bamberger, H., Lenz, S., Hallmen, P. P., Fennell, T., Simeoni, G. G., Arauzo, A., Bartolome, J., Bartolome, E., Lefmann, Kim, Weihe, Høgni, van Slageren, J. & Bendix, Jesper, 2018, In: Advanced Functional Materials. 28, 32, 8 p., 1801846.Research output: Contribution to journal › Journal article › Research › peer-review
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Magnetic ground state and magnon-phonon interaction in multiferroic h-YMnO3
fvh927, fvh927, Kreisel, Andreas, Schäffer, T. K., Bakke, A., Bertelsen, M., Hansen, U. B., Retuerto Millan, M., Larsen, J., Prabhakaran, D., Deen, P. P., Yamani, Z., Birk, J. O., Stuhr, U., Niedermayer, C., Fennell, A. L., Andersen, Brian Møller & Lefmann, Kim, 2018, In: Physical Review B. 97, 13, 11 p., 134304 .Research output: Contribution to journal › Journal article › Research › peer-review
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Spin susceptibility of the topological superconductor UPt3 from polarized neutron diffraction
Gannon, W. J., Halperin, W. P., Eskildsen, M. R., Dai, P., Hansen, U. B., Lefmann, Kim & Stunault, A., 10 Jul 2017, In: Physical Review B. 96, 4, 041111.Research output: Contribution to journal › Journal article › Research › peer-review
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Staging superstructures in high-Tc Sr/O codoped La2-xSrxCuO4+y
Ray, P. J., Andersen, N. H., Jensen, T. B. S., Mohottala, H. E., Niedermayer, C., Lefmann, Kim, v.Zimmermann, M. & Udby, L., 9 Nov 2017, In: Physical Review B. 96, 6 p., 174106.Research output: Contribution to journal › Journal article › Research › peer-review
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Magnetic properties of ultra-small goethite nanoparticles
Brok, E., Frandsen, C., Madsen, D. E., Jacobsen, Henrik, Birk, J. O., Lefmann, Kim, Bendix, Jesper, Pedersen, K. S., Boothroyd, C. B., Berhe, A. A., Simeoni, G. G. & Mørup, S., 9 Oct 2014, In: Journal of Physics D: Applied Physics. 47, 36, 365003.Research output: Contribution to journal › Journal article › Research › peer-review
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Comment on "Spin Dynamics of the 2D Spin Quantum Antiferromagnet Copper Deuteroformate Tetradeuterate (CFTD)"
Rønnow, H. M., McMorrow, D. F., Coldea, R., Harrison, A., Youngson, I. D., Perring, T. G., Aeppli, G., Syljuåsen, O. F., Lefmann, Kim & Rischel, C., 30 Jun 2002, In: Physical Review Letters. 89, 079702.Research output: Contribution to journal › Journal article › Research › peer-review
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Neutron study of magnetic excitations in 8-nm α-Fe2O3 nanoparticles
Kuhn, L. T., Lefmann, Kim, Bahl, C. R. H., Nyborg Ancona, S., Lindgård, P., Frandsen, C., Madsen, D. E. & Steen, M., 3 Nov 2006, In: Physical Review B. 74, 184406.Research output: Contribution to journal › Journal article › Research › peer-review
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Nordic neutron Scattering Communities 2008-2013 - a bibliometric study
Lefmann, Kim & Bakke, A., 1 Aug 2013Research output: Other contribution › Communication
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Inelastic neutron scattering experiments with the monochromatic imaging mode of the RITA-II spectrometer
Bahl, C. R. H., Lefmann, Kim, Abrahamsen, A. B., Rønnow, H. M., Saxild, F., Jensen, T. B. S., Udby, L. & Andersen, N. H., 1 May 2006, In: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 246, 2, p. 452-462Research output: Contribution to journal › Journal article › Research › peer-review
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Oriented attachment and exchange coupling of α-Fe2O3 nanoparticles
Frandsen, C., Bahl, C. R. H., Lebech, B., Lefmann, Kim, Theil Kuhn, L., Keller, L., Andersen, N. H., v.Zimmermann, M., Johnson, Erik, Klausen, S. N. & Mørup, S., 6 Dec 2005, In: Physical Review B. 72, 214406.Research output: Contribution to journal › Journal article › Research › peer-review
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Multiple scattering camouflaged as magnetic stripes in single crystals of superconducting (La,Sr)2CuO4
Tutueanu, A. E., Tejsner, T. B., Lacatusu, M. E., Hansen, H. W., Eliasen, K. L., Bohm, M., Steffens, P., Niedermayer, C. & Lefmann, Kim, 2020, In: Journal of Neutron Research. 22, 1, p. 49-56Research output: Contribution to journal › Journal article › Research › peer-review
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Q-dependent electron-phonon coupling induced phonon softening and non-conventional critical behavior in the CDW superconductor LaPt2Si2
Nocerino, E., Stuhr, U., San Lorenzo, I., Mazza, F., Mazzone, D. G., Hellsvik, J., Hasegawa, S., Asai, S., Masuda, T., Itoh, S., Minelli, A., Hossain, Z., Thamizhavel, A., Lefmann, Kim, Sassa, Y. & Månsson, M., 2023, In: Journal of Science: Advanced Materials and Devices. 8, 4, 10 p., 100621.Research output: Contribution to journal › Journal article › Research › peer-review
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Magnetic ordering in electronically phase-separated La2-x Srx CuO4+y: Neutron diffraction experiments
Udby, L., Chou, F. C., Christensen, N. B., Emery, S. B., Lefmann, Kim, Lynn, J. W., Mohottala, H. E., Niedermayer, C. & Wells, B. O., 6 Aug 2009, In: Physical Review B - Condensed Matter and Materials Physics. 80, 1, 014505.Research output: Contribution to journal › Journal article › Research › peer-review
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Avoided crossing of rattler modes in thermoelectric materials
Christensen, M., Abrahamsen, A. B., Christensen, N. B., Juranyi, F., Andersen, N. H., Lefmann, Kim, Andreasson, J., Bahl, C. & Iversen, B. B., 2008, In: Nature Materials. 7, 10, p. 811-815Research output: Contribution to journal › Journal article › Research › peer-review
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Magnetic ordering in electronically phase-separated La(2-x)Sr(x)CuO(4+y): Neutron diffraction experiments
Udby, L., Andersen, N. H., Chou, F. C., Christensen, N. B., Emery, S. B., Lefmann, Kim, Lynn, J. W., Mohottala, H. E., Niedermayer, C. & Wells, B. O., 2009, In: Physical Review B Condensed Matter. 80, p. 014505 5 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Hindered Rotational Energy Barriers of BH4 Tetrahedra in beta-Mg(BH4)(2) from Quasielastic Neutron Scattering and DFT Calculations
Blanchard, D., Maronsson, J. B., Riktor, M. D., Kheres, J., Sveinbjörnsson, D., Gil Bardaji, E., Léon, A., Juranyi, F., Wuttke, J., Lefmann, Kim, Hauback, B. C., Fichtner, M. & Vegge, T., 19 Jan 2012, In: Journal of Physical Chemistry C. 116, 2, p. 2013-2023 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Special Issue: Workshop on the Monte Carlo Simulation of Neutron Scattering Instruments MCNSI7
Lefmann, Kim & Šaroun, J., 1 Jan 2014, In: Journal of Neutron Research. 17, 1, p. 3-3Research output: Contribution to journal › Journal article › Research › peer-review
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MJOLNIR: A software package for multiplexing neutron spectrometers
Lass, J., Jacobsen, H., Mazzone, D. G. & Lefmann, Kim, 1 Dec 2020, In: SoftwareX. 12, 9 p., 100600.Research output: Contribution to journal › Journal article › Research › peer-review
ID: 3673604
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Solitonic lattice and Yukawa forces in the rare-earth orthoferrite TbFeO3
Research output: Contribution to journal › Journal article › Research › peer-review
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1149
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50 Years of Swiss Neutron Diffraction Instrumentation
Research output: Contribution to journal › Journal article › Research
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855
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Long-Pulse Neutron Instrumentation Workshop, August 26-28, 2009
Research output: Other contribution › Research
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