Magnetic-field-induced phase transition in BiFeO3 observed by high-field electron spin resonance:: Cycloidal to homogeneous spin order -: art. no. 064114

被引:378
作者
Ruette, B [1 ]
Zvyagin, S
Pyatakov, AP
Bush, A
Li, JF
Belotelov, VI
Zvezdin, AK
Viehland, D
机构
[1] Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA
[2] Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
[3] Russian Acad Sci, Inst Gen Phys, Moscow 119991, Russia
[4] Tech Univ, Moscow State Inst Radio Engn Elect & Automat, Moscow 117454, Russia
关键词
D O I
10.1103/PhysRevB.69.064114
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Bismuth ferrite is a magnetoelectric material, which simultaneously has polarization and spin orders. We have used electron spin resonance (ESR) as a local probe of the magnetic order in the magnetic-field range of 0-25 T, in the frequency domain of 115-360 GHz, and at a temperature of 4.2 K. The data reveal significant changes in the ESR spectra with increasing field, which have been analyzed by taking into account the magnetic anisotropy of the crystal and a magnetoelectric Dzyaloshinsky-Moria-like interaction. The results demonstrate an induced phase transition from an incommensurately cycloidal modulated state to one with homogeneous spin order.
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页数:7
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