Coupled Magnetic Cycloids in Multiferroic ${\mathrm{TbMnO}}_{3}$ and ${\mathrm{Eu}}_{3/4}{\mathrm{Y}}_{1/4}{\mathrm{MnO}}_{3}$

Coupled Magnetic Cycloids in Multiferroic ${TbMnO}_{3}$ and ${Eu}_{3 / 4} Y_{1 / 4} {MnO}_{3}$

Hoyoung Jang, J.-S. Lee, K.-T. Ko, W.-S. Noh, T. Y. Koo, J.-Y. Kim, K.-B. Lee, J.-H. Park, C. L. Zhang, Sung Baek Kim, and S.-W. Cheong

Phys. Rev. Lett. 106, 047203 – Published 25 January 2011

Abstract

Based on the detailed Mn $L_{2, 3}$ -edge x-ray resonant scattering results, we report a new complexity in the magnetic order of multiferroic orthomangnites, which has been considered as the simple $A$ -type cycloid order inducing ferroelectricity. The Dzyaloshinskii-Moriya interaction involved in the orthorhombic distortion brings on $F$ -type canting from the $A$ type, and the ordering type becomes the off-phase synchronized $b c$ cycloid in ${TbMnO}_{3}$ or the tilted antiphase $a b$ cycloid in ${Eu}_{3 / 4} Y_{1 / 4} {MnO}_{3}$ . The $F$ -type canting is responsible for the magnetic field-driven multiferroicity to weak ferromagnetism transition.

Received 12 August 2010

DOI:https://doi.org/10.1103/PhysRevLett.106.047203

Authors & Affiliations

Hoyoung Jang¹, J.-S. Lee^1,2, K.-T. Ko¹, W.-S. Noh¹, T. Y. Koo³, J.-Y. Kim³, K.-B. Lee^1,3, J.-H. Park^1,3,4,*, C. L. Zhang⁵, Sung Baek Kim^6,7, and S.-W. Cheong^5,6

¹Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
²NSLS Brookhaven National Laboratory, Upton, NY 11973, USA
³Pohang Acceleration Laboratory, Pohang University of Science and Technology, Pohang 790-784, Korea
⁴Division of Advanced Materials Science, Pohang University of Science and Technology, Pohang 790-784, Korea
⁵R-CEM & Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
⁶l_PEM & Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
⁷Advancement for College Education Center, Konyang University, Chungnam 320-711, Korea.