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Oh, Yoon Seok
Laboratory for Strong Correlation in Quantum Materials
Research Interests
  • Multiferroic
  • Ferroelectric
  • Quantum Magnetism

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Realization of giant magnetoelectricity in helimagnets

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Title
Realization of giant magnetoelectricity in helimagnets
Author
Chun, Sae HwanChai, Yi ShengOh, Yoon SeokJaiswal-Nagar, DeepshikhaHaam, So YoungKim, IngyuLee, BumsungNam, Dong HakKo, Kyung-TaePark, Jae-HoonChung, Jae-HoKim, Kee Hoon
Keywords
POLARIZATION; MULTIFERROICS
Issue Date
2010-01
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.104, no.3, pp.037204 -
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. © 2010 The American Physical Society.
URI
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DOI
10.1103/PhysRevLett.104.037204
ISSN
0031-9007
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PHY_Journal Papers
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