Room-temperature ferromagnetism in Sr1-xYxCoO3-δ (0.2 ≤ x ≤ 0.25) -: art. no. 104408

被引：84

作者：

Kobayashi, W ^{[1
]}

Ishiwata, S

Terasaki, I

Takano, M

Grigoraviciute, I

Yamauchi, H

Karppinen, M

机构：

[1] Waseda Univ, Dept Appl Phys, Tokyo 1698555, Japan

[2] Japan Sci & Technol Agcy, CREST, Tokyo 1080075, Japan

[3] Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.72.104408

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have measured magnetic susceptibility and resistivity of Sr1-xYxCoO3-delta (x=0.1, 0.15, 0.2, 0.215, 0.225, 0.25, 0.3, and 0.4), and found that Sr1-xYxCoO3-delta is a room temperature ferromagnet with a Curie temperature of 335 K in a narrow compositional range of 0.2 <= x <= 0.25. This is the highest transition temperature among perovskite Co oxides. The saturation magnetization for x=0.225 is 0.25 mu(B)/Co at 10 K, which implies that the observed ferromagnetism is a bulk effect. We attribute this ferromagnetism to a peculiar Sr/Y ordering.

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页数：5

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