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, Kee Hoon Kim
2011 Physical Review B  
Comparative studies of magnetoelectric susceptibility (α), magnetization (M), and magnetostriction (u) in TbMn_2O_5 reveal that the increment of M owing to the field-induced Tb^3+ spin alignment coins a field-asymmetric line shape in the α(H) curve, being conspicuous in a low temperature incommensurate phase but persistently subsisting in the entire ferroelectric phase. Correlations among electric polarization, u, and M^2 variation represent linear relationships, unambiguously showing the
more » ... icant role of Tb magnetoelastic effects on the low field magnetoelectric phenomena of TbMn_2O_5. An effective free energy capturing the observed experimental features is also suggested.
doi:10.1103/physrevb.83.060405 fatcat:5ibnr7usezf5xghg7x6pyyhpam