TY - JOUR
T1 - Room-temperature ferromagnetism in Sr1-xYxCoO3-δ (0.2≤x≤0.25)
AU - Kobayashi, Wataru
AU - Ishiwata, S.
AU - Terasaki, I.
AU - Takano, M.
AU - Grigoraviciute, I.
AU - Yamauchi, H.
AU - Karppinen, M.
PY - 2005/9/1
Y1 - 2005/9/1
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.72.104408
DO - 10.1103/PhysRevB.72.104408
M3 - Article
AN - SCOPUS:29644443507
VL - 72
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 10
M1 - 104408
ER -