Neutron Brillouin Scattering with Pulsed Spallation Neutron Source --- Spin-Wave Excitations from Ferromagnetic Powder Samples

The neutron Brillouin scattering (NBS) method, which was developed using advanced neutron sources, was extended to an intense pulsed spallation neutron source. The feasibility of this method was demonstrated by observing ferromagnetic spin waves in La 0.8 Sr 0.2 MnO 3 and SrRuO 3 powders. Gapless sp...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2013-04, Vol.82 (4), p.043001-043001-4
Main Authors: Itoh, Shinichi, Endoh, Yasuo, Yokoo, Tetsuya, Kawana, Daichi, Kaneko, Yoshio, Tokura, Yoshinori, Fujita, Masaki
Format: Article
Language:English
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Summary:The neutron Brillouin scattering (NBS) method, which was developed using advanced neutron sources, was extended to an intense pulsed spallation neutron source. The feasibility of this method was demonstrated by observing ferromagnetic spin waves in La 0.8 Sr 0.2 MnO 3 and SrRuO 3 powders. Gapless spin-wave excitations were observed in La 0.8 Sr 0.2 MnO 3 , which were continuously extrapolated to the lower scattering vector $Q$ from previous results using single crystals. The novel result is a well-defined quadratic $Q$ dependence in the spin-wave dispersion curve with a large energy gap in SrRuO 3 .
ISSN:0031-9015
1347-4073
DOI:10.7566/JPSJ.82.043001