The monochromatic imaging mode of a RITA-type neutron spectrometer

Autor: Kim Lefmann, P. Andersen, Christian R.H. Bahl, S.N. Klausen

Publikováno v: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 226:667-681

The imaging monochromatic mode of a neutron spectrometer with a multi-bladed RITA analyser system is so far unexplored. We present analytical calculations that define the mode. It is shown that the mode can be realised for PG (0 0 2) analyser crystal

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fdb1071172a6404773e8669fc063d59e
https://doi.org/10.1016/j.nimb.2004.07.005

[Untitled]

Autor: Steen Mørup, Kim Lefmann, Per-Anker Lindgård, Cathrine Frandsen, Mikkel Fougt Hansen, S.N. Klausen, F. Bødker

Publikováno v: Hyperfine Interactions. :347-357

The magnetic properties of antiferromagnetic nanoparticles have been studied by Mossbauer spectroscopy and neutron scattering. Temperature series of Mossbauer spectra of non-interacting, superparamagnetic hematite nanoparticles were fitted by use of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7d7a1bbe89fc44c9cc61a87e725d58a5
https://doi.org/10.1023/a:1025430411360

Simulations and experiments on RITA-2 at PSI

Autor: D.F. McMorrow, F. Altorfer, K. Lefmann, M Luthy, S.N. Klausen, S. Janssen

Publikováno v: Applied Physics A: Materials Science & Processing. 74:s1508-s1510

The cold-neutron triple-axis spectrometer RITA-2 designed and built at Riso National Laboratory was installed at the neutron source SINQ at Paul Scherrer Institute in April/May 2001. In connection with the installation of RITA-2, computer simulations

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::18eada38f27ce3252880cb2359d5ece8
https://doi.org/10.1007/s003390201745

Magnetic anisotropy and quantized spin waves in hematite nanoparticles

Autor: Steen Mørup, Christof Niedermayer, Per-Anker Lindgård, Christian R.H. Bahl, S.N. Klausen, K. Lefmann, B. Roessli, N. Cavadini, L. Theil Kuhn, Cathrine Frandsen

Publikováno v: University of Copenhagen
Klausen, S N, Lefmann, K, Lindgård, P-A, Kuhn, L T, Bahl, C R H, Frandsen, C, Mørup, S, Roessli, B, Cavadini, N & Niedermayer, C 2004, ' Magnetic anisotropy and quantized spin waves in hematite nanoparticles ', Physical Review B Condensed Matter, vol. 70, no. 21, pp. 214411 . https://doi.org/10.1103/PhysRevB.70.214411

We report on the observation of high-frequency collective magnetic excitations, $\ensuremath{\hbar}\ensuremath{\omega}\ensuremath{\approx}1.1\phantom{\rule{0.3em}{0ex}}\mathrm{meV}$, in hematite $(\ensuremath{\alpha}\text{\ensuremath{-}}{\mathrm{Fe}}

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::106c0c12281b6ad8527da2927092d512
https://curis.ku.dk/portal/en/publications/magnetic-anisotropy-and-quantized-spin-waves-in-hematite-nanoparticles(77795230-2915-4391-9b75-f5b081d65f5c).html

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