2002年4月
Collapse of 5f-electron ferromagnetism in UPtAl under high pressures
HIGH PRESSURE RESEARCH
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- 巻
- 22
- 号
- 1
- 開始ページ
- 159
- 終了ページ
- 162
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1080/08957950290003012
- 出版者・発行元
- TAYLOR & FRANCIS LTD
UPtAl exhibits a ferromagnetic ordering of U magnetic moments at temperatures below T-C = 42.5 K. The magnetic-ordering transition is accompanied by an anomaly in the temperature dependence of electrical resistivity. This allows us to determine the value of Curie temperature from p vs. T data that can be measured at very high pressures, at which reliable magnetization measurements are difficult. We report on resistivity measurements performed on an UPtAl single crystal under hydrostatic pressures p less than or equal to 8 GPa. It was observed that the initial increase of T-C with p becomes gradually reduced for p > 2 GPa until the maximum T-C value of approximate to 48 K is reached between 4 and 6 GPa that is followed by a progressively developing downturn of the T-C(p) curve. The latter result is attributed to the approaching collapse of the U 5f-moment ferromagnetism. Low-temperature resistivity data point to a rapidly reduced magnetic anisotropy at highest pressures.
- リンク情報
- ID情報
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- DOI : 10.1080/08957950290003012
- ISSN : 0895-7959
- ORCIDのPut Code : 45573571
- Web of Science ID : WOS:000176798900034