| Item type |
デフォルトアイテムタイプ_（フル）(1) |
| 公開日 |
2023-03-18 |
| タイトル |
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タイトル |
Magnetic and transport properties of the pseudobinary systems Ce(Fe1-xCox)2 and (Ce1-yScy)Fe2 |
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言語 |
en |
| 作成者 |
Fukuda, H.
Fujii, Hironobu
Kamura, H.
Hasegawa, Yuichi
Ekino, Toshikazu
Kikugawa, Naoki
Suzuki, Takashi
Fujita, Toshizo
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| アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
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権利情報 |
Copyright (c) 2001 American Physical Society. |
| 内容記述 |
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内容記述 |
We studied the dilute substitution effect on magnetic and transport properties in an unstable ferromagnet CeFe2 with a C15 cubic Laves-phase structure. In the Co substitution system Ce(Fe1-xCox)2 with x≤0.10, while the Curie temperature T c decreases with increasing the Co concentration, an antiferromagnetic ordering appears in the low temperature region for x≥0.05, and the transition temperature T o from ferromagnetic to antiferromagnetic states monotonously increases with increasing the Co concentration. On the other hand, in the Sc substitution system (Ce1-ySCy)Fe2 with y≤0.10, both the Curie temperature T c and saturation magnetization M s at 4.2 K gradually increase with increasing the Sc concentration. Despite the decrease in lattice parameter upon substitution in both the systems, an antiferromagnetic ground state is stabilized in Ce(Fe1-xCox)2, whereas a ferromagnetic ground state is stabilized in (Ce1-yScy)Fe2. These results indicate that the Fe 3d–Fe 3d ferromagnetic exchange interaction and the antiferromagnetic spin correlation arising from the Ce4f–Fe3d hybridization compete in CeFe2, and the enhancement/depression of the 4f-3d hybridization effect might make the ferromagnetic ground state in CeFe2 unstable/stable. Furthermore, Ce(Fe1-xCox)2 exhibited a negative giant magnetoresistance reaching about δρ/ρ= ∼60–65 % at 4.2 K, which is accompanied by a metamagnetic transition from antiferromagnetic to ferromagnetic states. The giant magnetoresistance effect is originated from the reconstruction of Fermi surface due to the collapse of the superzone gap after the metamagnetic transition. |
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言語 |
en |
| 出版者 |
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出版者 |
American Physical Society |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 関連情報 |
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識別子タイプ |
DOI |
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関連識別子 |
10.1103/PhysRevB.63.054405 |
| 関連情報 |
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識別子タイプ |
DOI |
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関連識別子 |
http://dx.doi.org/10.1103/PhysRevB.63.054405 |
| 収録物識別子 |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
0163-1829 |
| 収録物識別子 |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA00362255 |
| 開始ページ |
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開始ページ |
054405-1 |
| 書誌情報 |
Physical Review B - Condensed Matter and Materials Physics
Physical Review B - Condensed Matter and Materials Physics
巻 63,
号 5,
p. 054405-1-054405-9,
発行日 2001-01-03
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| 旧ID |
18667 |
PhysRevB_63_054405.pdf (154.6 KB)
