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Published on: March 24, 2019
Multiferroic properties of o-LuMnO3 controlled by b-axis strain
Y W Windsor1, S W Huang1, Y Hu2
1Swiss Light Source, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland.
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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