Crystal orientation dependence of magnetostriction of twinned perovskite cobalt oxide
Crystal orientation dependence of magnetostriction of twinned perovskite cobalt oxide
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DOI：
10.1016/j.jallcom.2018.04.139
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发表时间：
2018-07
影响因子：
6.2
通讯作者：
K. Sato;K. Minagawa;M. Nakamura;T. Ichikawa;Y. Hara;K. Nakaoka;Y. Kobayashi;K. Asai
中科院分区：
文献类型：
--
作者：
K. Sato;K. Minagawa;M. Nakamura;T. Ichikawa;Y. Hara;K. Nakaoka;Y. Kobayashi;K. Asai
研究了孪晶菱面体钙钛矿型钴氧化物La0.8Sr0.2CoO3的磁致伸缩随晶向的变化规律.磁场沿[111] c和[110] c轴方向沿着施加时的磁致伸缩表现出较大的磁滞回线和残余应变。另一方面，在沿[001] c轴沿着施加的磁场中没有观察到磁滞和残余应变。磁致伸缩沿着[111] c和[110] c轴的大的磁滞和残余应变被成功地解释为菱面体畴与磁晶硬轴沿着菱面体[111] r的重排。磁致伸缩沿着[001] c轴没有磁滞和残余应变是由所有磁畴的[111] r向[001] c轴的等投影解释的。La0.8Sr0.2CoO3的孪晶结构与磁各向异性定性地解释了磁致伸缩的晶向依赖性。
We investigated crystalline orientation dependence of magnetostriction of twinned rhombohedral perovskite cobalt oxide, La 0.8 Sr 0.2 CoO 3. The magnetostriction in a magnetic field applied along the pseudo-cubic [111] c and [110] c axes showed large hysteresis and residual strains. On the other hand, hysteresis and residual strain were not observed in the applied magnetic field along the [001] c axis. The large hysteresis and residual strains of the magnetostriction along the [111] c and [110] c axes are successfully interpreted as a rearrangement of the rhombohedral domains with the magnetocrystalline hard axis along the rhombohedral [111] r. The no hysteresis and no residual strain of the magnetostriction along the [001] c axis are interpreted by equal projection to [001] c axis of [111] r of all the domains. The twinned structure of La 0.8 Sr 0.2 CoO 3 with the magnetic anisotropy qualitatively accounts for the crystalline-orientation dependence of the magnetostrictions.