TY - JOUR
T1 - High-temperature metallic state of room-temperature ferromagnet Sr 1-xYxCoO3-δ
AU - Kobayashi, Wataru
AU - Yoshida, Shin
AU - Terasaki, Ichiro
PY - 2006/10
Y1 - 2006/10
N2 - Resistivity, thermopower, Hall coefficient, and magnetization are measured for a set of polycrystalline samples of the room-temperature ferromagnet Sr 1-xYxCoO3-δ up to 800 K. A peculiar metallic state accompanied by a large effective magnetic moment of 3.40 μB/Co is observed above 600 K, indicating that electrons on the Co3+ ions are magnetic and itinerant. The magnetic Co3+ ions survive at low temperatures, which causes the ferromagnetism below 335 K. We attribute this to the large CoO6 octahedra stabilized in the A-site ordered structure.
AB - Resistivity, thermopower, Hall coefficient, and magnetization are measured for a set of polycrystalline samples of the room-temperature ferromagnet Sr 1-xYxCoO3-δ up to 800 K. A peculiar metallic state accompanied by a large effective magnetic moment of 3.40 μB/Co is observed above 600 K, indicating that electrons on the Co3+ ions are magnetic and itinerant. The magnetic Co3+ ions survive at low temperatures, which causes the ferromagnetism below 335 K. We attribute this to the large CoO6 octahedra stabilized in the A-site ordered structure.
KW - A-site ordered structure
KW - Cobalt oxide
KW - High-temperature metallic state
KW - Room-temperature ferromagnetism
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U2 - 10.1143/JPSJ.75.103702
DO - 10.1143/JPSJ.75.103702
M3 - Article
AN - SCOPUS:33847348485
SN - 0031-9015
VL - 75
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 10
M1 - 103702
ER -