Pressure-induced long-range magnetic ordering in cobalt oxide

被引：19

作者：

Ding, Yang

Ren, Yang

Chow, Paul

Zhang, Jianzhong

Vogel, Sven C.

Winkler, Bjoern

Xu, Jian

Zhao, Yusheng

Mao, Ho-Kwang

机构：

[1] Argonne Natl Lab, HPCAT, Adv Photon Source, Argonne, IL 60439 USA

[2] Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA

[3] Argonne Natl Lab, Expt Facil Div, Argonne, IL 60439 USA

[4] Los Alamos Natl Lab, LANSCE, Los Alamos, NM 87545 USA

[5] Goethe Univ Frankfurt, Inst Mineral, Abt Kristallog, D-60054 Frankfurt, Germany

来源：

PHYSICAL REVIEW B | 2006年 / 74卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.74.144101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A long-range magnetic ordering transition in cobalt oxide (CoO) was observed around 2.2 GPa at room temperature using neutron diffraction. The magnetic structure was type-II antiferromagnetic. High-resolution synchrotron x-ray diffraction showed no evidence of a tetragonal lattice distortion in CoO in the magnetically ordered phase. This result indicates that the tetragonal lattice distortion occurring with magnetic ordering in the low-temperature structure of CoO could be associated with cooperative Jahn-Teller effects (orbital ordering), which, however, are decoupled from magnetic ordering under high pressure.

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页数：4

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