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Competing interactions in ferromagnetic/antiferromagnetic perovskite superlattices...

Publication Type
Journal
Journal Name
Physical Review B
Publication Date
Page Number
180417
Volume
80
Issue
18

The structural, magnetic, and magnetotransport properties of La0.7Sr0.3FeO3 (LSFO)/La0.7Sr0.3MnO3 (LSMO) perovskite oxide superlattices were determined as a function of sublayer thickness and temperature. The properties of the ferromagnetic LSMO layers gradually approach the case of the LSFO/LSMO solid solution with decreasing superlattice period, namely decreasing saturation magnetization and Curie temperature, and increasing resistivity. By contrast, the N�el temperature of the antiferromagnetic LSFO layer depends weakly on sublayerthickness and the orientation of the Fe moments differs from the solid solution and single layer LSFO films irrespective of sublayer thickness. This diverging behavior illustrates the delicate balance between exchange coupling, charge transfer, and long‐range interactions, and providesan interesting means to control of the properties of oxide superlattices.