Realization of Giant Magnetoelectricity in Helimagnets

被引：160

作者：

Chun, Sae Hwan ^{[1
]}

Chai, Yi Sheng ^{[1
]}

Oh, Yoon Seok ^{[1
]}

Jaiswal-Nagar, Deepshikha ^{[1
]}

Haam, So Young ^{[1
]}

Kim, Ingyu ^{[1
]}

Lee, Bumsung ^{[1
]}

Nam, Dong Hak ^{[1
]}

Ko, Kyung-Tae ^{[3
,4
]}

Park, Jae-Hoon ^{[3
,4
]}

Chung, Jae-Ho ^{[2
]}

Kim, Kee Hoon ^{[1
]}

机构：

[1] Seoul Natl Univ, Dept Phys & Astron, FPRD, Seoul 151747, South Korea

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

[3] POSTECH, Dept Phys, Pohang 790784, South Korea

[4] POSTECH, Div Adv Mat Sci, Pohang 790784, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 03期

关键词：

POLARIZATION; MULTIFERROICS;

D O I：

10.1103/PhysRevLett.104.037204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that low field magnetoelectric (ME) properties of helimagnets Ba0.5Sr1.5Zn2(Fe1-xAlx)(12)O-22 can be efficiently tailored by the Al-substitution level. As x increases, the critical magnetic field for switching electric polarization is systematically reduced from similar to 1 T down to similar to 1 mT, and the ME susceptibility is greatly enhanced to reach a giant value of 2.0 x 10(4) ps/m at an optimum x = 0.08. We find that control of the nontrivial orbital moment in the octahedral Fe sites through the Al substitution is crucial for fine-tuning the magnetic anisotropy and obtaining the conspicuously improved ME characteristics.

引用

页数：4

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