We have investigated the exchange bias effect in La_0.7Sr_0.3MnO₃/SrRuO₃ bilayers that epitaxial grown in different directions and various substrates. A linear-tunable exchange bias effect, which related to the spin states of the SrRuO₃ layers have been discovered. The spin state of Ru⁴⁺ play the centre role in the interaction, and proposes mechanisms to understand the Mn-O-Ru antiferromagnetic coupling. This study emphasizes the effect of the spin state as well as the exchange strength on the interfacial coupling, which may open a constructive approach in improving the performance of the related spintronic devices.

中文翻译：

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Ru ^4+中的高态自旋：在La _0.7 Sr _0.3 MnO ₃ / SrRuO ₃异质结构的界面偶联中起作用

我们研究了在不同方向和各种衬底上外延生长的La _0.7 Sr _0.3 MnO ₃ / SrRuO ₃双层膜中的交换偏压效应。已经发现与SrRuO ₃层的自旋状态有关的线性可调交换偏压效应。Ru ⁴⁺的自旋态在相互作用中起中心作用，并提出了理解Mn-O-Ru反铁磁耦合的机理。这项研究强调了自旋状态以及交换强度对界面耦合的影响，这可能为改善相关自旋电子器件的性能开辟了建设性的方法。