Interplay among spin, orbital, and lattice degrees of freedom in a frustrated spinel Mn3O4

被引：27

作者：

Nii, Y. ^{[1
,2
]}

Sagayama, H. ^{[2
]}

Umetsu, H. ^{[1
]}

Abe, N. ^{[2
]}

Taniguchi, K. ^{[3
]}

Arima, T. ^{[2
]}

机构：

[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

[2] Univ Tokyo, Dept Adv Mat Sci, Kashiwa, Chiba 2778561, Japan

[3] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 19期

基金：

日本学术振兴会;

关键词：

HAUSMANNITE;

D O I：

10.1103/PhysRevB.87.195115

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated magnetic-field (H parallel to[100]) effect on a spin-frustrated tetragonally distorted spinelMn3O4 by measurements of magnetization, dielectric constant, and strain as well as synchrotron x-ray and neutron diffraction. In two low-temperature phases below 40 K, long-wavelength lattice modulations coupled with magnetic order have been confirmed, revealing spin-lattice coupling caused by the exchange striction in the geometrically frustrated Mn3+ spin moments on the distorted pyrochlore lattice. A magnetic-field-induced phase transition has been found at low temperatures, which involves an abrupt change in both structural and magnetic configurations. The magnetostructural phase transition by the application of a magnetic field H parallel to[100] is discussed in terms of interplay among spin, orbital, and lattice degrees of freedom.

引用

页数：7

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