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오윤석

Oh, Yoon Seok
Laboratory for Strong Correlation in Quantum Materials
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Giant magnetoelastic spin-flop with magnetocrystalline instability in La1.4Sr1.6Mn2O7

Author(s)
Ko, K.-T.Jang, H.Kim, D.-H.Park, B.-G.Kim, J.-Y.Kim, S. B.Oh, Yoon SeokCheong, S.-W.Park, J.-H.
Issued Date
2018-01
DOI
10.1103/PhysRevMaterials.2.014408
URI
https://scholarworks.unist.ac.kr/handle/201301/23235
Fulltext
https://journals.aps.org/prmaterials/abstract/10.1103/PhysRevMaterials.2.014408
Citation
PHYSICAL REVIEW MATERIALS, v.2, pp.014408
Abstract
We studied a low-field giant magnetostrictive spin-flop transition in a colossal magnetoresistance manganite La1.4Sr1.6Mn2O7 using resonant soft x-ray diffraction and soft x-ray absorption spectroscopy at the Mn L2,3 edge. The spin-flop transition is induced by an instability of magnetocrystalline anisotropy near a critical eg orbital configuration with a balanced occupation in dx2−y2 and d3z2−r2
states, which contribute in-plane and out-of-plane orbital angular momenta, respectively. The magnetic field drives a certain change in the orbital occupation with lattice distortion to switch the magnetic anisotropy, resulting in the spin-flop transition. These results provide a comprehensive mechanism of interplay between spin, orbital, and lattice degrees of freedom to realize a low-field giant magnetoelasticity.
Publisher
AMER PHYSICAL SOC
ISSN
2475-9953

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