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ID 30814
本文ファイル
著者
Adroja, D. T
Hillier, A. D
Deen, P. P
Strydom, A. M
Muro, Yuji
Kajino, Junpei
Kockelmann, W. A
Anand, V. K
Stewart, J. R
Taylor, J
NDC
化学
抄録(英)
We have carried out neutron diffraction, muon spin relaxation (mu SR), and inelastic neutron scattering (INS) investigations on a polycrystalline sample of CeOs2Al10 to investigate the nature of the phase transition observed near 29 K in the resistivity and heat capacity. Our mu SR data clearly reveal coherent frequency oscillations below 28 K, indicating the presence of an internal field at the muon site, which confirms the long-range magnetic ordering of the Ce moment below 28 K. Upon cooling the sample below 15 K, unusual behavior of the temperature-dependent mu SR frequencies may indicate either a change in the muon site, consistent with the observation of superstructure reflections in electron diffraction, or a change in the ordered magnetic structure. Neutron diffraction data do not reveal any clear sign of either magnetic Bragg peaks or superlattice reflections. Furthermore, INS measurements clearly reveal the presence of a sharp inelastic excitation near 11 meV between 5 and 26 K, due to opening of a gap in the spin-excitation spectrum, which transforms into a broad response at and above 30 K. The magnitude of the spin gap (11 meV) as derived from the INS peak position agrees very well with the gap value as estimated from the bulk properties.
掲載誌名
Physical Review B
82巻
10号
開始ページ
104405-1
終了ページ
104405-9
出版年月日
2010-09-07
出版者
American Physical Society
ISSN
1082-586X
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
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フォーマット
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権利情報
Copyright (c) 2010 The American Physical Society
関連情報URL
部局名
先端物質科学研究科