Origin of the large polarization in multiferroic YMnO$_3$ thin films revealed by soft and hard x-ray diffraction

H. Nakao; H. Wadati; J. Okamoto; M. Garganourakis; M. Kawasaki; M. Mochizuki; M. Nakamura; U. Staub; V. Scagnoli; Y. Murakami

arxiv: 1109.2366 · v1 · pith:7AMLKFZMnew · submitted 2011-09-12 · ❄️ cond-mat.str-el · cond-mat.mtrl-sci

Origin of the large polarization in multiferroic YMnO₃ thin films revealed by soft and hard x-ray diffraction

H. Wadati , J. Okamoto , M. Garganourakis , V. Scagnoli , U. Staub , Y. Yamasaki , H. Nakao , Y. Murakami

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M. Mochizuki M. Nakamura M. Kawasaki Y. Tokura

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classification ❄️ cond-mat.str-el cond-mat.mtrl-sci

keywords thinx-raybelowdiffractione-typefilmhardlarge

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We investigated the magnetic structure of an orthorhombic YMnO3 thin film by resonant soft x-ray and hard x-ray diffraction. We observed a temperature-dependent incommensurate magnetic reflection below 45 K and a commensurate lattice-distortion reflection below 35 K. These results demonstrate that the ground state is composed of coexisting E-type and cycloidal states. Their different ordering temperatures clarify the origin of the large polarization to be caused by the E-type antiferromagnetic states in the orthorhombic YMnO3 thin film.

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Origin of the large polarization in multiferroic YMnO₃ thin films revealed by soft and hard x-ray diffraction

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