Relationship between Magnetic Property and Structural Phase Transition of La1-xSrxCrO3

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  • HASHIMOTO Takuya
    Department of Integrated Sciences in Physics and Biology, College of Humanities and Sciences, Nihon University

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  • Ｌａ１－ｘＳｒｘＣｒＯ３の磁性と結晶構造相転移との相関
  • La1 xSrxCrO3 ノ ジセイ ト ケッショウ コウゾウ ソウテンイ トノ ソウカン

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Abstract

The phase transition behavior of perovskite-type compounds, La1-xSrxCrO3, was investigated by differential scanning calorimetry, measurement of do magnetic property and X-ray diffraction at regulated temperatures. The phase diagram of La1-xSrxCrO3 has been established, which includes four phases, paramagnetic orthorhombic, canted antiferromagnetic orthorhombic, canted antiferromagnetic rhombohedral and paramagnetic rhombohedral. It was also revealed that magnetic properties such as residual magnetization (Mr) and coercive force (Hc) were affected by the variation of crystal structure from orthorhombic to rhombohedral. It was suggested that decrease of deviation of Cr-O-Cr angle from 180° by the structural phase transition decreased Mr and Hc observed in La1-xSrxCrO3 with x larger than 0.11.

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