Magnetic-field-induced color change in α-Fe2O3 single crystals

被引：25

作者：

Chen, P. ^{[1
]}

Lee, N. ^{[2
,3
]}

McGill, S. ^{[4
]}

Cheong, S. -W. ^{[2
,3
]}

Musfeldt, J. L. ^{[1
]}

机构：

[1] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA

[2] Rutgers State Univ, Rutgers Ctr Emergent Mat, Piscataway, NJ 08854 USA

[3] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[4] Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 17期

基金：

美国国家科学基金会;

关键词：

OPTICAL-ABSORPTION SPECTRUM; WEAK FERROMAGNETISM; LIGHT-ABSORPTION; SPIN WAVES; TRANSITIONS; HEMATITE; ANTIFERROMAGNETS; INSULATOR; CORUNDUM; CR2O3;

D O I：

10.1103/PhysRevB.85.174413

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigated the magneto-optical properties of alpha-Fe2O3 in order to understand the interplay between charge and magnetism in a model transition metal oxide. We discovered that hematite appears more red in applied magnetic field than in zero-field conditions, an effect that is amplified by the presence of the spin-flop transition. Analysis of the exciton pattern on the edge of the d-d color band reveals C2 monoclinic symmetry in the high-field phase. These findings advance our understanding of magnetoelectric coupling away from the static limit and motivate spectroscopic work on other iron-based materials under extreme conditions.

引用

页数：5

共 40 条

[1] MAGNETIC DAVYDOV SPLITTINGS IN OPTICAL ABSORPTION SPECTRUM OF CR2O3 [J].