Single antiferromagnetic axisX-ray absorptionX-ray magnetic linear dichroismConfiguration-interaction cluster calculation
Single Antiferromagnetic Axis of Fe in Orthorhombic YMn0.5Fe0.5O3 Films Observed by X-ray Magnetic Linear Dichroism
S. C. Haw, C. Y. Kuo*, Z. Hu, J. W. Lin, J. M. Lee, K. T. Lu, C. H. Lee, H. J. Lin, J. F. Lee, C. W. Pao, A. Tanaka, L. H. Tjeng, C. T. Chen, and J. M. Chen*
2018/12/05
~The electronic and magnetic structure of orthorhombic (o-) YMn0.5Fe0.5O3 (YMFO) epitaxial film (space group Pbnm) deposited on the YAlO3 (010) substrate have been investigated using linear polarization-dependent x-ray absorption spectroscopy and magnetization measurements. The magnetic-ordering temperature of around 280 K is observed in o-YMFO film. The x-ray absorption spectra at the Fe-K and the Mn-K edges indicate the existence of anisotropic crystal field in o-YMFO film, with the longest and shortest Fe–O and Mn–O bonds tend to align with the crystallographic b- and a-axis, respectively, whereas the medium Fe(Mn)–O bond is aligned with the c-axis. The experimental x-ray magnetic linear dichroism at the Fe-L2 edges demonstrate an unusual single antiferromagnetic axis of Fe3+ ions below magnetic-ordering temperature, while a multi antiferromagnetic axis is generally observed in o-RFeO3 (R = rare earth) thin films. Our configuration-interaction cluster calculations also reveal that the single antiferromagnetic axis of the Fe sublattice is aligned with the b-axis in o-YMFO film, whereas it is directed along the a-axis in the bulk o-YFeO3.
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