Pressure-Induced Magnetic Transition in Manganite (La0.75Ca0.25MnO3)

被引：62

作者：

Ding, Yang ^{[1
]}

Haskel, Daniel ^{[2
]}

Tseng, Yuan-Chieh ^{[2
,3
]}

Kaneshita, Eiji ^{[2
]}

van Veenendaal, Michel ^{[2
,4
]}

Mitchell, J. F. ^{[5
]}

Sinogeikin, Stanislav V. ^{[6
]}

Prakapenka, Vitali ^{[7
]}

Mao, Ho-kwang ^{[1
,6
,8
]}

机构：

[1] Carnegie Inst Sci, HPSynC, Argonne, IL 60439 USA

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

[3] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60201 USA

[4] No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA

[5] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[6] Carnegie Inst Sci, HPCAT, Argonne, IL 60439 USA

[7] Univ Chicago, Adv Photon Source, GSECARS, Argonne, IL 60439 USA

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

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 23期

关键词：

X-RAY DICHROISM; K-EDGE; CIRCULAR-DICHROISM; DOUBLE EXCHANGE; PHASE-DIAGRAM; ABSORPTION; RESISTIVITY;

D O I：

10.1103/PhysRevLett.102.237201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Low temperature Mn K-edge x-ray magnetic circular dichroism and x-ray diffraction measurements were carried out to investigate the stability of the ferromagnetic ground state in manganite La0.75Ca0.25MnO3 under nearly uniform compression using diamond anvil cells. The magnetic dichroism signal gradually decreases with pressure and disappears at 23 GPa, and meanwhile a uniaxial compression of MnO6 octahedra along the b axis is observed to continuously increase with pressure and become anomalously large at 23.5 GPa. These changes are attributed to a ferromagnetic-antiferromagnetic transition that is associated with orbital ordering at high pressure.

引用

页数：4

共 40 条

[1] CONSIDERATIONS ON DOUBLE EXCHANGE [J].