Giant magnetoresistance in Ce2Fe17

Physical Review B - Condensed Matter and Materials Physics 56 巻 21 号 13 716-13 719 頁 1997-12-01 発行
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タイトル ( eng )
Giant magnetoresistance in Ce2Fe17
作成者
Janssen Yuri
Fujii Hironobu
Izawa Koichi
Fujita Toshizo
De Boer Frank R.
収録物名
Physical Review B - Condensed Matter and Materials Physics
56
21
開始ページ 13 716
終了ページ 13 719
抄録
Using a single-phase sample of Ce2Fe17 with the rhombohedral Th2Zn17-type structure, we measured the magnetization, resistivity, and specific heat under various magnetic fields up to 5.5 T. Below Tc=125 K, giant magnetoresistance (GMR) is induced by the metamagnetic transition from the antiferromagnetic to ferromagnetic states. The value of Δρ/ρ(≅ρAF-ρF)/ρ AF) reaches 0.85 at 4.2 K, while the value γ(≅C/T at 0 K) of 351 mJ/K2/mole in zero field only decreases ∼20% by the metamagnetic transition. These results suggest that GMR is due to the closing of a superzone gap formed by antiferromagnetic ordering of Fe spins, while the large γ value is due to valence fluctuations of the Ce-4f electrons, weakly dependent on magnetic field.
言語
英語
資源タイプ 学術雑誌論文
出版者
American Physical Society
発行日 1997-12-01
権利情報
Copyright (c) 1997 American Physical Society.
出版タイプ Version of Record(出版社版。早期公開を含む)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 0163-1829
[DOI] 10.1103/PhysRevB.56.13716
[NCID] AA00362255
[DOI] http://dx.doi.org/10.1103/PhysRevB.56.13716