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

Research output: Contribution to journalArticlepeer-review

167 Citations (Scopus)

Abstract

We show that low field magnetoelectric (ME) properties of helimagnets Ba0.5Sr1.5Zn2(Fe1-xAlx)12O22 can be efficiently tailored by the Al-substitution level. As x increases, the critical magnetic field for switching electric polarization is systematically reduced from ∼1T down to ∼1mT, and the ME susceptibility is greatly enhanced to reach a giant value of 2.0×104ps/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.

Original languageEnglish
Article number037204
JournalPhysical review letters
Volume104
Issue number3
DOIs
Publication statusPublished - 2010 Jan 21

Bibliographical note

Funding Information:
The following funding is acknowledged: Knut och Alice Wallenbergs Stiftelse (grant No. 2014.075); Vetenskapsrådet (grant No. 2014-4732); Stiftelsen Olle Engkvist Byggmästare (award No. 1041513); H2020 Marie Skłodowska-Curie Actions (grant No. 637295). The FemtoMAX beamline was funded by the Knut och Alice Wallenbergs Stiftelse and 12 Swedish research universities (grant No. 2010.0098).

ASJC Scopus subject areas

  • General Physics and Astronomy

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