Spin ice and soft spin ice ground state under high pressure: comparative study by neutron scattering

被引：2
|
作者：
Mirebeau, I. [1 ]
Goncharenko, I. [1 ]
Cao, H. [1 ]
机构：
[1] CEA, CNRS, CE Saclay, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France
来源：
HIGH PRESSURE RESEARCH | 2010年 / 30卷 / 01期
关键词：
geometrical frustration; spin ice; high pressure; neutron diffraction; UNIGA;
D O I：
10.1080/08957950903385005
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We performed high pressure neutron diffraction experiments in two geometrically frustrated pyrochlore magnets. The soft spin ice Tb2Sn2O7 was studied up to 4.6GPa and down to 60mK. Its ordered spin ice structure with k0=0 propagation vector partly transforms under pressure into a magnetic structure with k1=(0 0 1). The reduction of the total ordered Tb moment with respect to ambient pressure suggests that spin liquid fluctuations are also enhanced by pressure. The pressure-induced state is discussed by considering the influence of both isotropic pressure and stress. In contrast, in the true spin ice Ho2Ti2O7, no effect of pressure is observed up to 6GPa and down to 1.4K.
引用
收藏
页码：3 / 11
页数：3
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