Room-temperature ferromagnetism in Sr1-xYxCoO3-δ (0.2≤x≤0.25)

W. Kobayashi*, S. Ishiwata, I. Terasaki, M. Takano, I. Grigoraviciute, H. Yamauchi, M. Karppinen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

82 Citations (Scopus)

Abstract

We have measured magnetic susceptibility and resistivity of Sr1-xYxCoO3-δ (x=0.1, 0.15, 0.2, 0.215, 0.225, 0.25, 0.3, and 0.4), and found that Sr1-xYxCoO3-δ is a room temperature ferromagnet with a Curie temperature of 335K 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 0.25μB Co at 10K, which implies that the observed ferromagnetism is a bulk effect. We attribute this ferromagnetism to a peculiar Sr Y ordering.

Original languageEnglish
Article number104408
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number10
DOIs
Publication statusPublished - 1 Sep 2005
MoE publication typeA1 Journal article-refereed

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