Kim Lefmann

Kim Lefmann

Professor

Member of:

    ORCID: 0000-0003-4282-756X

    Publication year:
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    1 - 50 out of 147Page size: 50
    1. Published

      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-S103

      Research output: Contribution to journal › Conference article › Research › peer-review

    2. Published

      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

    3. Published

      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

    4. Published

      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

    5. Published

      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. 313-324

      Research output: Contribution to journal › Journal article › Research › peer-review

    6. Published

      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

    7. Published

      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

    8. Published

      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

    9. Published

      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. 1083-1085

      Research output: Contribution to journal › Conference article › Research › peer-review

    10. Published

      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

    11. Published

      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

    12. Published

      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. 77-85

      Research output: Contribution to journal › Journal article › Research › peer-review

    13. Published

      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

    14. Published

      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

    15. Published

      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. 6340-6350

      Research output: Contribution to journal › Journal article › Research › peer-review

    16. Published

      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. 8

      Research output: Contribution to journal › Journal article › Communication

    17. Published

      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. 667-681

      Research output: Contribution to journal › Journal article › Research › peer-review

    18. Published

      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

    19. Published

      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

    20. Published

      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

    21. Published

      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. 3744-3747

      Research output: Contribution to journal › Journal article › Research

    22. Published

      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. 092413

      Research output: Contribution to journal › Journal article › Research › peer-review

    23. Published

      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. 2361-2364

      Research output: Contribution to journal › Journal article › Research › peer-review

    24. Published

      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

    25. Published

      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. 814111

      Research output: Contribution to journal › Conference article › Research › peer-review

    26. Published

      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

    27. Published

      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. 229-241

      Research output: Contribution to journal › Journal article › Research › peer-review

    28. Published

      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

    29. Published

      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

    30. Published

      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

    31. Published

      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

    32. Published

      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

    33. Published

      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

    34. Published

      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

    35. Published

      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

    36. Published

      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

    37. Published

      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

    38. Published

      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

    39. Published

      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

    40. Published

      Nordic neutron Scattering Communities 2008-2013 - a bibliometric study

      Lefmann, Kim & Bakke, A., 1 Aug 2013

      Research output: Other contribution › Communication

    41. Published

      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. 452-462

      Research output: Contribution to journal › Journal article › Research › peer-review

    42. Published

      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

    43. Published

      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. 49-56

      Research output: Contribution to journal › Journal article › Research › peer-review

    44. Published

      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

    45. Published

      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

    46. Published

      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. 811-815

      Research output: Contribution to journal › Journal article › Research › peer-review

    47. Published

      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

    48. Published

      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

    49. Published

      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. 3-3

      Research output: Contribution to journal › Journal article › Research › peer-review

    50. Published

      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

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