Magnetic correlations reflected by anomalies in transport and elastic properties of uranium intermetallics

V. Sechovský, F. Honda, B. Janoušová, K. Prokeš, P. Svoboda, O. Syshchenko, A. V. Andreev

研究成果: Contribution to journalConference article査読

2 被引用数 (Scopus)

抄録

We discuss anomalies in temperature dependences of the electrical resistivity ρ(T) and thermal-expansion ΔL/L(T) observed for UTX compounds (T = transition metal, X = p-electron element) in paramagnetic range. We shall concentrate on the antiferromagnets UNiAl and UNiGa and the itinerant 5f-electron metamagnet UCoAl. The ρ(T) and ΔL/L(T) anomalies are usually strongly anisotropic and survive far above the Néel temperature or a characteristic temperature T* (UCoAl) but can be removed in a high magnetic field applied along the easy-magnetization direction (c-axis). In some cases, the available specific-heat data allow to calculate the entropy change ΔS connected with applying a high magnetic field along the c-axis. The ΔS values also show a maximum above TN (UNiAl, UNiGa) or T* (UCoAl) and then slowly decay with increasing temperatures. A possible scenario for these phenomena presented here, is based on existence of antiferromagnetic (AF) correlations and/or short-range AF ordering surviving in paramagnetic range.

本文言語英語
ページ(範囲)95-99
ページ数5
ジャーナルPhysica B: Condensed Matter
328
1-2
DOI
出版ステータス出版済み - 4 2003
外部発表はい
イベントT2PAM - Higashi-Hiroshima, 日本
継続期間: 8 16 20028 19 2002

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学

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