Strong magnetoelastic effect on the magnetoelectric phenomena of TbMn 2O5

Yoon Seok Oh, Byung Gu Jeon, S. Y. Haam, S. Park, V. F. Correa, A. H. Lacerda, S. W. Cheong, Gun Sang Jeon, Kee Hoon Kim

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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.

Original languageEnglish
Article number060405
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number6
StatePublished - 11 Feb 2011


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