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

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Successive Magnetic-Field-Induced Transitions and Colossal Magnetoelectric Effect in Ni3TeO6

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Title
Successive Magnetic-Field-Induced Transitions and Colossal Magnetoelectric Effect in Ni3TeO6
Author
Kim, Jae WookArtyukhin, SMun, EDJaime, MHarrison, NHansen, AYang, JJOh, Yoon SeokVanderbilt, DZapf, VSCheong, SW
Keywords
Digital storage; Magnetoelectric effects; Polarization
Issue Date
2015-09
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.115, no.13, pp.137201 -
Abstract
We report the discovery of a metamagnetic phase transition in a polar antiferromagnet Ni3TeO6 that occurs at 52 T. The new phase transition accompanies a colossal magnetoelectric effect, with a magnetic-field-induced polarization change of 0.3  μC/cm2, a value that is 4 times larger than for the spin-flop transition at 9 T in the same material, and also comparable to the largest magnetically induced polarization changes observed to date. Via density-functional calculations we construct a full microscopic model that describes the data. We model the spin structures in all fields and clarify the physics behind the 52 T transition. The high-field transition involves a competition between multiple different exchange interactions which drives the polarization change through the exchange-striction mechanism. The resultant spin structure is rather counterintuitive and complex, thus providing new insights on design principles for materials with strong magnetoelectric coupling.
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DOI
10.1103/PhysRevLett.115.137201
ISSN
0031-9007
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PHY_Journal Papers
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