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ID 19292
本文ファイル
著者
Echizen, Yuji
Jung, Myoung Hwa
Sakakibara, Toshiro
Terashima, Taichi
Terakura, Chieko
Pfleiderer, Christian
Uhlarz, Marc
Löhneysen, Hilbert Von
抄録(英)
We present a detailed study of the field (B) - temperature (T) phase diagram of the heavy-fermion antiferromagnet Ce7Ni3 that crystallizes in the hexagonal Th7Fe3-type structure with three nonequivalent Ce sites (CeI, CeII, and CeIII). This compound undergoes two magnetic transitions at TN1 = 1.9 K and TN2 0.7 K in zero field. Below TN1, an incommensurate spin density wave (SDW) develops, and below TN2 a commensurate SDW appears independently. By applying fields along the c axis, both TN1 and TN2, are suppressed and vanish at 0.3 T. For B∥c > 0.7 T, however, another magnetic phase appears below 0.5 K, which was found by magnetoresistance, specific heat, and magnetization measurements. The separation of the field induced phase from the SDW phase is attributed to large spin fluctuations of CeIII, which originate from a geometrical frustration in the quasiregular tetrahedron made of CeI and CeIII.
掲載誌名
Physical Review B - Condensed Matter and Materials Physics
67巻
14号
開始ページ
144408-1
終了ページ
144408-6
出版年月日
2003-04-10
出版者
American Physical Society
ISSN
1098-0121
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
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) 2003 The American Physical Society.
関連情報URL
部局名
先端物質科学研究科