六方-DyMnO3 的磁性和微拉曼研究。
Magnetic and micro-Raman studies of hexagonal-DyMnO3.
机构信息
Département de Physique, Université de Sherbrooke, Sherbrooke, Canada.
出版信息
J Phys Condens Matter. 2013 Feb 13;25(6):066003. doi: 10.1088/0953-8984/25/6/066003. Epub 2013 Jan 10.
Abstract
Dc-susceptibility measurements and Raman active phonon frequencies of hexagonal DyMnO(3) retrace the Mn(3+) ions antiferromagnetic transition at T(N) ~ 70 K and their spin reorientation at T(SR) ~ 48 K. The temperature evolution of Raman active mode frequencies and their over-hardening are associated with Dy(3+) and Mn(3+) ion displacements below T(N) and with a spin-phonon coupling that involves apical oxygen.
摘要
六方 DyMnO(3) 的直流磁化率测量和拉曼活性声子频率再现了 Mn(3+) 离子在 T(N)70K 处的反铁磁转变，以及它们在 T(SR)48K 处的自旋重取向。拉曼活性模频率及其过硬化的温度演化与 T(N)以下的 Dy(3+)和 Mn(3+)离子位移以及涉及顶氧的自旋-声子耦合有关。
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