The irreversible structural change in Mn1.1Fe0.9P0.8Ge0.2: Evidence for a magnetic driver | Zendy

Xubo Liu | Zendy; D. H. Ryan | Zendy; L. M. D. Cranswick | Zendy; Danmin Liu | Zendy; Hongguo Zhang | Zendy; Ming Yue | Zendy; Z. Altounian | Zendy

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The irreversible structural change in Mn1.1Fe0.9P0.8Ge0.2: Evidence for a magnetic driver

Author(s) -

Xubo Liu,

D. H. Ryan,

L. M. D. Cranswick,

Danmin Liu,

Hongguo Zhang,

Ming Yue,

Z. Altounian

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4973287

Subject(s) - magnetic refrigeration , antiferromagnetism , neutron diffraction , density functional theory , condensed matter physics , materials science , diffraction , chemistry , thermodynamics , crystallography , magnetization , computational chemistry , physics , magnetic field , crystal structure , optics , quantum mechanics

Neutron powder diffraction measurements complemented by first-principles density functional theory (DFT) calculations have been used to study the irreversible change that accompanies the reversible magnetocaloric transition (MCT) in Mn1.1Fe0.9P0.8Ge0.2. We observe the growth and loss of long-period antiferromagnetism as we pass through the MCT for the first time and the development of significant strain in the cycled material. We attribute both the reversible and irreversible changes to the distance dependence of the Mn-Mn exchange in the Mn-P(Ge) ab–plane layers

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