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arXiv · 1402.1057

Multiferroic properties of o-LuMnO$_3$ controlled by b-axis strain

Y. W. Windsor·S. W. Huang·Y. Hu·L. Rettig·A. Alberca·K. Shimamoto·V. Scagnoli·T. Lippert·C. W. Schneider·U. Staub
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Abstract

Strain is a leading candidate for controlling magnetoelectric coupling in multiferroics. Here, we use x-ray diffraction to study the coupling between magnetic order and structural distortion in epitaxial films of the orthorhombic (o-) perovskite LuMnO$_3$. An antiferromagnetic spin canting in the E-type magnetic structure is shown to be related to the ferroelectrically induced structural distortion and to a change in the magnetic propagation vector. By comparing films of different orientations and thicknesses, these quantities are found to be controlled by b-axis strain. It is shown that compressive strain destabilizes the commensurate E-type structure and reduces its accompanying ferroelectric distortion.

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Y. W. Windsor, S. W. Huang, Y. Hu, L. Rettig, A. Alberca, K. Shimamoto, V. Scagnoli, T. Lippert, C. W. Schneider, U. Staub. 2014-06-25. Multiferroic properties of o-LuMnO$_3$ controlled by b-axis strain. https://doi.org/10.1103/physrevlett.113.167202

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