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Strong spin-lattice coupling in multiferroic HoMnO$_{3}$: Thermal expansion anomalies and pressure effect by Cruz, C. dela; Yen, F.; Lorenz, B.; Wang, Y. Q.; Sun, Y. Y.; Gospodinov, M. M.; Chu, C. W. is a scholarly article available to read on EtoBox.

What is Strong spin-lattice coupling in multiferroic HoMnO$_{3}$: Thermal expansion anomalies and pressure effect about?

Evidence for a strong spin-lattice coupling in multiferroic HoMnO_3 is derived from thermal expansion measurements along a- and c-axis. The magnetoelastic effect results in sizable anomalies of the thermal expansivities at the antiferromagnetic (T_N) and the spin rotation (T_{SR}) transition temperatures as well as in a negative c-axis expansivity below room temperature. The coupling between magnetic orders and dielectric properties below T_N is explained by the lattice strain induced by the magnetoelastic effect. At T_{SR} various physical quantities show discontinuities that are thermodynamically consistent with a first order phase transition.

Author

Cruz, C. dela; Yen, F.; Lorenz, B.; Wang, Y. Q.; Sun, Y. Y.; Gospodinov, M. M.; Chu, C. W.

Published

2005

Language

EN