Journal of the Korean Physical Society

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J. Korean Phys. Soc. 2020; 76(10): 904-910

Published online May 29, 2020     https://doi.org/10.3938/jkps.76.904

Copyright © The Korean Physical Society.

Direct Evidence of Simultaneous Reversal of Ferrimagnetically Coupled Sm 4f and Mn 3d Angular Momenta in SmMnO3

J.-S. Jung1, T. Nakamura2, Y. Wakabayashi3, T. Kimura4

1MLCC Materials Development Group, Samsung Electro-Mechanics, Suwon 16674, Korea
2Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo, Hyogo 679-5198, Japan
3Department of Physics, Tohoku University, Sendai, Miyagi 980-8578, Japan
4Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan

Correspondence to:T. Kimura

Abstract

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A Néel N-type ferrimagnet, SmMnO3, exhibits a striking magnetocapacitive effect around the compensation temperature. To clarify the origin of the magnetocapacitive effect, the magnetic states of the Sm 4f and the Mn 3d moments in SmMnO3 were investigated by means of X-ray magnetic circular dichroism (XMCD). The information on the Sm 4f and the Mn 3d magnetic states were obtained by using soft X-rays for the Sm M4,5 and the Mn L2,3 edges, respectively. Our soft XMCD data directly demonstrate that the magnetocapacitive effect of SmMnO3 is induced by simultaneous reversals of Sm 4f and Mn 3d angular momenta.

Keywords: X-ray magnetic circular dichroism, Rare-earth manganite, Magnetization reversal

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