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

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

157 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 language	English
Article number	037204
Journal	Physical review letters
Volume	104
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevLett.104.037204
Publication status	Published - 2010 Jan 21

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.104.037204

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title = "Realization of giant magnetoelectricity in helimagnets",

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.",

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

note = "Funding Information: The following funding is acknowledged: Knut och Alice Wallenbergs Stiftelse (grant No. 2014.075); Vetenskapsr{\aa}det (grant No. 2014-4732); Stiftelsen Olle Engkvist Byggm{\"a}stare (award No. 1041513); H2020 Marie Sk{\l}odowska-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).",

year = "2010",

month = jan,

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doi = "10.1103/PhysRevLett.104.037204",

language = "English",

volume = "104",

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T1 - Realization of giant magnetoelectricity in helimagnets

AU - Chun, Sae Hwan

AU - Chai, Yi Sheng

AU - Oh, Yoon Seok

AU - Jaiswal-Nagar, Deepshikha

AU - Haam, So Young

AU - Kim, Ingyu

AU - Lee, Bumsung

AU - Nam, Dong Hak

AU - Ko, Kyung Tae

AU - Park, Jae Hoon

AU - Chung, Jae Ho

AU - Kim, Kee Hoon

N1 - 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).

PY - 2010/1/21

Y1 - 2010/1/21

N2 - 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.

AB - 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.

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Realization of giant magnetoelectricity in helimagnets

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