Pressure-induced transition in the multiferroic CoCr2O4 spinel

被引：37

作者：

Efthimiopoulos, I. ^{[1
]}

Liu, Z. T. Y. ^{[2
]}

Khare, S. V. ^{[2
]}

Sarin, P. ^{[3
]}

Lochbiler, T. ^{[1
]}

Tsurkan, V. ^{[4
,5
]}

Loidl, A. ^{[4
]}

Popov, D. ^{[6
]}

Wang, Y. ^{[1
]}

机构：

[1] Oakland Univ, Dept Phys, Rochester, MI 48309 USA

[2] Univ Toledo, Dept Phys, Toledo, OH 43606 USA

[3] Oklahoma State Univ, Sch Mat Sci & Engn, Tulsa, OK 74106 USA

[4] Univ Augsburg, Expt Phys 5, Ctr Elect Correlat & Magnetism, Inst Phys, D-86159 Augsburg, Germany

[5] Moldavian Acad Sci, Inst Appl Phys, MD-2028 Kishinev, Moldova

[6] Carnegie Inst Sci, Geophys Lab, High Pressure Collaborat Access Team, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW B | 2015年 / 92卷 / 06期

基金：

美国国家科学基金会;

关键词：

INITIO MOLECULAR-DYNAMICS; TOTAL-ENERGY CALCULATIONS; AVERAGE PROPERTIES; CURIE-TEMPERATURE; ATOMS; DECOMPOSITION; ALGORITHM; CHROMITE; PHONON; STATE;

D O I：

10.1103/PhysRevB.92.064108

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have explored the high-pressure structural, vibrational, electronic, and magnetic behavior of the multiferroic CoCr2O4 spinel up to 30 GPa by means of x-ray diffraction, Raman spectroscopy, and density functional theory calculations. Our investigations revealed a reversible tetragonal distortion of the starting cubic structure above 16 GPa. We suggest that the structural modification is mainly driven by magnetic effects induced under pressure. The results obtained are compared with the high-pressure behavior of related spinels.

引用

页数：9

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