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Strong magnetoelastic effect on the magnetoelectric phenomena of TbMn2O5

Yoon Seok Oh, Byung-Gu Jeon, S. Y. Haam, S. Park, V. F. Correa, A. H. Lacerda, S.-W. Cheong, Gun Sang Jeon, and Kee Hoon Kim
Phys. Rev. B 83, 060405(R) – Published 17 February 2011

Abstract

Comparative studies of magnetoelectric susceptibility (α), magnetization (M), and magnetostriction (u) in TbMn2O5 reveal that the increment of M owing to the field-induced Tb3+ spin alignment produces a field-asymmetric line shape in the α(H) curve, which is conspicuous in a low-temperature incommensurate phase but persistently subsists in the entire ferroelectric phase. Correlations among electric polarization, u, and M2 variation represent linear relationships, unambiguously showing the significant role of Tb magnetoelastic effects on the low-field magnetoelectric phenomena of TbMn2O5. An effective free energy capturing the observed experimental features is also suggested.

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  • Received 1 November 2010

DOI:https://doi.org/10.1103/PhysRevB.83.060405

©2011 American Physical Society

Authors & Affiliations

Yoon Seok Oh1, Byung-Gu Jeon1, S. Y. Haam1, S. Park2, V. F. Correa3, A. H. Lacerda4, S.-W. Cheong2, Gun Sang Jeon1, and Kee Hoon Kim1,*

  • 1CeNSCMR, Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Republic of Korea
  • 2Rutgers Center for Emergent Materials and Department of Physics & Astronomy, Piscataway, NJ 08854, USA
  • 3Comisión Nacional de Energía Atómica, Centro Atómico Bariloche, 8400 S. C. de Bariloche, Argentina
  • 4LANSCE, Los Alamos National Laboratory, Los Alamos, NM 87545, USA

  • *khkim@phya.snu.ac.kr

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Issue

Vol. 83, Iss. 6 — 1 February 2011

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