Heliconical magnetic order and field-induced multiferroicity of the Co2Y-type hexaferrite Ba0.3Sr1.7Co2Fe12O22

被引：48

作者：

Lee, Hak Bong ^{[1
]}

Chun, Sae Hwan ^{[2
]}

Shin, Kwang Woo ^{[2
]}

Jeon, Byung-Gu ^{[2
]}

Chai, Yi Sheng ^{[2
]}

Kim, Kee Hoon ^{[2
]}

Schefer, Juerg ^{[3
]}

Chang, Hun ^{[1
]}

Yun, Sae-Na ^{[1
]}

Joung, Tae-Young ^{[1
]}

Chung, Jae-Ho ^{[1
]}

机构：

[1] Korea Univ, Dept Phys, Seoul 136713, South Korea

[2] Seoul Natl Univ, Dept Phys & Astron, CeNSCMR, Seoul 151747, South Korea

[3] Paul Scherrer Inst, Neutron Scattering Lab, CH-5232 Villigen, Switzerland

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 09期

基金：

新加坡国家研究基金会;

关键词：

NEUTRON-DIFFRACTION; POLARIZATION; FERROELECTRICITY; HELIMAGNET; REVERSAL; SYSTEM; SINQ;

D O I：

10.1103/PhysRevB.86.094435

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using magnetoelectric measurements and neutron diffraction, we investigated multiferroic properties of Co2Y hexaferrite Ba0.3Sr1.7Co2Fe12O22 in zero and finite magnetic field (H perpendicular to c). Upon zero-field cooling, a longitudinal heliconical magnetic structure was observed below 280 K, which involves incommensurate planar helical ordering. When the magnetic field was applied perpendicular to its c axis, electric polarization was observed and the incommensurate ordering was replaced by a commensurate one as commonly observed in other hexaferrites. Electric polarization remained at its maximum during field reversal at 10 K, which indicates that magnetic anisotropy within the basal planes stabilizes the field-induced electric polarization.

引用

页数：6

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