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원자제어 저차원 전자계 연구단
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Giant magnetoelastic spin-flop with magnetocrystalline instability in La1.4Sr1.6Mn2O7

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Title
Giant magnetoelastic spin-flop with magnetocrystalline instability in La1.4Sr1.6Mn2O7
Author(s)
Ko, KT; Jang, H; Kim, DH; Park, BG; J.-Y. Kim; Kim, SB; Oh, YS; Cheong, SW; Park, JH
Publication Date
2018-01
Journal
Physical Review Materials, v.2, no.1, 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 L-2,L-3 edge. The spin-flop transition is induced by an instability of magnetocrystalline anisotropy near a critical e(g) orbital configuration with a balanced occupation in d(x)(-y)(2)(2) and d(3z)(-r)(2)(2) 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 ©2018 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/4453
ISSN
2475-9953
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
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