Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 82, Issue 4, Pages -Publisher
PHYSICAL SOC JAPAN
DOI: 10.7566/JPSJ.82.043001
Keywords
inelastic neutron scattering; pulsed neutron; neutron Brillouin scattering; ferromagnet; spin waves
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Funding
- Ministry of Education, Culture, Sports, Science and Technology of Japan
- Japan Society for the Promotion of Science
- Neutron Scattering Program Advisory Committee of the Institute of Materials Structure Science, High Energy Accelerator Research Organization [2011S01, 2012S01]
- Grants-in-Aid for Scientific Research [24540352, 23654112, 23244068] Funding Source: KAKEN
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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 La0.8Sr0.2MnO3 and SrRuO3 powders. Gapless spin-wave excitations were observed in La0.8Sr0.2MnO3, 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 SrRuO3.
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