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首页> 外文期刊>IEEE Transactions on Magnetics >The Effect of the Superlattice on the Magnetic and Transport Properties of Epitaxial Magnetite Thin Films
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The Effect of the Superlattice on the Magnetic and Transport Properties of Epitaxial Magnetite Thin Films

机译：超晶格对外延磁铁矿薄膜的磁性和输运性能的影响

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摘要

The surface structural, transport, and magnetic properties of superlattice films were examined, focusing on the effects of the superlattice periodicity of (Fe3O4/MgO) layers. The superlattice structures of (Fe3O4/MgO)(n) ultrathin films were fabricated using molecular-beam epitaxy on MgO(001) substrates, where n is the number of layers. It was observed that these oxide films have a single crystalline quality with the same orientation as the substrates for Fe3O4 as thin as approximately three unit cells. The transport and magnetic results showed that the conductivity and magnetization of the superlattice increase as the number of (Fe3O4/MgO) layers is increased. Furthermore, a sharp Verwey transition was found in the (Fe3O4/MgO)(n) superlattices with thickness layer smaller than seen in an earlier study for a single or superlattice film. These results give the indication that Fe3O4 superlattice ultrathin films have better properties than single layers of the same thickness. This artificial growth of superlattice ultrathin films will provide a useful method to realize novel properties for other complex oxide systems.
机译：研究了超晶格薄膜的表面结构，传输和磁性，重点研究了（Fe3O4 / MgO）层的超晶格周期性的影响。 （Fe3O4 / MgO）（n）超薄膜的超晶格结构是在MgO（001）衬底上使用分子束外延法制造的，其中n是层数。观察到，这些氧化物膜具有与用于Fe 3 O 4的衬底相同的取向的单晶质量，其厚度薄至大约三个晶胞。传输和磁性结果表明，随着（Fe3O4 / MgO）层数的增加，超晶格的电导率和磁化强度也随之增加。此外，在（Fe3O4 / MgO）（n）超晶格中发现了急剧的Verwey过渡，其厚度层小于早期对单晶或超晶格膜的研究。这些结果表明，Fe3O4超晶格超薄膜比相同厚度的单层具有更好的性能。超晶格超薄膜的这种人工生长将为实现其他复杂氧化物体系的新特性提供有用的方法。

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