Spin Structure in an Interfacially Coupled Epitaxial Ferromagnetic Oxide Heterostructure
Spin Structure in an Interfacially Coupled Epitaxial Ferromagnetic Oxide Heterostructure
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DOI：
10.1103/physrevlett.110.237201
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发表时间：
2013-06-04
影响因子：
8.6
通讯作者：
Rzchowski, M. S.
中科院分区：
文献类型：
--
作者：
Ke, X.;Belenky, L. J.;Rzchowski, M. S.
报道了一种交换偏置铁磁氧化物异质结构La0.67Sr0.33MnO_3/SrRuO_3的磁化强度和偏振中子反射率测量结果。我们发现，La0.67Sr0.33MnO_3偏置层的磁化反转过程在很大程度上取决于冷却过程中SrRuO_3偏置层的自旋结构。此外，我们观察到偏置层的意外双移位磁滞回线，这源于偏置层内形成横向180度磁畴，这是传统交换偏置系统中没有的一种新机制。
We report the spin structure of an exchange-biased ferromagnetic oxide heterostructure, La0.67Sr0.33MnO3/SrRuO3, through magnetization and polarized neutron reflectometry measurements. We reveal that the magnetization reversal process of the La0.67Sr0.33MnO3 biased layer critically depends on the frozen-in spin structure of the SrRuO3 biasing layer during the cooling process. Furthermore, we observe unexpected double-shifted hysteresis loops of the biased layer that originates from the formation of lateral 180 degrees magnetic domains within the biasing layer, a new mechanism not found in conventional exchange-bias systems.