Realization of giant magnetoelectricity in helimagnets

Sae Hwan Chun; Yi Sheng Chai; Yoon Seok Oh; Deepshikha Jaiswal-Nagar; So Young Haam; Ingyu Kim; Bumsung Lee; Dong Hak Nam; Kyung-Tae Ko; Jae-Hoon Park; Jae-Ho Chung; Kee Hoon Kim

doi:10.1103/PhysRevLett.104.037204

Realization of giant magnetoelectricity in helimagnets

Materials Science 2010-01-21 v2 Strongly Correlated Electrons

Authors: Sae Hwan Chun , Yi Sheng Chai , Yoon Seok Oh , Deepshikha Jaiswal-Nagar , So Young Haam , Ingyu Kim , Bumsung Lee , Dong Hak Nam , Kyung-Tae Ko , Jae-Hoon Park , Jae-Ho Chung , Kee Hoon Kim

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Abstract

We show that low field magnetoelectric (ME) properties of helimagnets Ba0.5Sr1.5Zn2(Fe1-xAlx)12O22 can be efficiently tailored by Al-substitution level. As x increases, the critical magnetic field for switching electric polarization is systematically reduced from ~1 T down 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 nontrivial orbital moment in the octahedral Fe sites through the Al-substitution is crucial for fine tuning of magnetic anisotropy and obtaining the conspicuously improved ME characteristics.

Keywords

magnetoelectric effect helimagnets Al-substitution critical magnetic field magnetic anisotropy orbital moment giant magnetoelectricity

Cite

@article{arxiv.1001.1226,
  title  = {Realization of giant magnetoelectricity in helimagnets},
  author = {Sae Hwan Chun and Yi Sheng Chai and Yoon Seok Oh and Deepshikha Jaiswal-Nagar and So Young Haam and Ingyu Kim and Bumsung Lee and Dong Hak Nam and Kyung-Tae Ko and Jae-Hoon Park and Jae-Ho Chung and Kee Hoon Kim},
  journal= {arXiv preprint arXiv:1001.1226},
  year   = {2010}
}

Realization of giant magnetoelectricity in helimagnets

Abstract

Keywords

Cite

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