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Spin-Glass Behavior and Magnetic Phase Diagram of La1-xSrxCoO3( 0 ≤x≤0.5) Studied by Magnetization Measurements

Journal of the Physical Society of Japan · 1994 · Vol. 63(4) · pp. 1486–1493

Masayuki Itoh✉(Chiba University)Ikuomi Natori(Chiba University)Satoshi Kubota(Saitama University)Kiyoichiro Motoya(Saitama University)

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Abstract

Magnetic properties of La 1- x Sr x CoO 3 (0 ≤ x ≤0.5) have been studied by magnetization measurements in low magnetic fields. It has been found that there exist spin-glass (0< x ≤0.18) and cluster-glass (0.18 ≤ x ≤0.5) regions. Ferromagnetic long-range order previously reported does not take place. Spin-glass behavior is ascribed to the frustration of random competing exchange interactions, namely the ferromagnetic double-exchange interaction between Co 3+ and Co 4+ and the antiferromagnetic one between like spins.

Magnetic and transport properties of perovskites and related materials Advanced Condensed Matter Physics Physics of Superconductivity and MagnetismSpin glassAntiferromagnetismCondensed matter physicsFrustrationFerromagnetismMagnetizationSpinsPhase diagramSpin (aerodynamics)Cluster (spacecraft)

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