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

J.-S. Jung

doi:10.3938/jkps.76.904

pISSN 0374-4884 eISSN 1976-8524

Article

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

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

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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Abstract

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 M_4,5 and the Mn L_2,3 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.