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arXiv 1301.0678cond-mat.str-elcond-mat.mtrl-sci
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Y $_{0.67}$ Ca $_{0.33}$ MnO $_3$薄膜中的铁磁泡团

Ferromagnetic bubble clusters in Y$_{0.67}$Ca$_{0.33}$MnO$_3$ thin films

Jeehoon Kim, N. Haberkorn, L. Civale, P. C. Dowden, R. Movshovich

摘要:

利用磁力显微镜和磁化强度测量相结合的方法研究了Y $_{0.67}$ Ca $_{0.33}$ MnO $_3$薄膜的铁磁拓扑结构。我们的结果表明,之前报道的该系统的类似自旋玻璃的行为可以归因于嵌入非铁磁基质中的铁磁团簇的受抑界面。我们发现,在低温下,这表明一个非静态的Mn $^{3+}$ /Mn $^{4+}$比的磁性拓扑结构的温度依赖性的变化。

英文摘要:

We studied the ferromagnetic topology in a Y$_{0.67}$Ca$_{0.33}$MnO$_3$ thin film with a combination of magnetic force microscopy and magnetization measurements. Our results show that the spin-glass like behavior, reported previously for this system, could be attributed to frustrated interfaces of the ferromagnetic clusters embedded in a non-ferromagnetic matrix. We found temperature dependent changes of the magnetic topology at low temperatures, which suggests a non-static Mn$^{3+}$/Mn$^{4+}$ ratio.

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