摘要
Evidence for a strong spin-lattice coupling in multiferroic HoMnO 3 is derived from thermal expansion measurements along the a and c axes. 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.
原文 | English |
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文章編號 | 060407 |
期刊 | Physical Review B - Condensed Matter and Materials Physics |
卷 | 71 |
發行號 | 6 |
DOIs | |
出版狀態 | Published - 2005 2月 |
All Science Journal Classification (ASJC) codes
- 電子、光磁材料
- 凝聚態物理學