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@ARTICLE{Staunton:153871,
author = {Staunton, J. B. and Banerjee, R. and dos Santos Dias,
Manuel and Deak, A. and Szunyogh, L.},
title = {{F}luctuating local moments, itinerant electrons, and the
magnetocaloric effect: {C}ompositional hypersensitivity of
{F}e{R}h},
journal = {Physical review / B},
volume = {89},
number = {5},
issn = {1098-0121},
address = {College Park, Md.},
publisher = {APS},
reportid = {FZJ-2014-03350},
pages = {054427},
year = {2014},
abstract = {We describe an ab initio disordered local moment theory for
materials with quenched static compositional disorder
traversing first-order magnetic phase transitions. It
accounts quantitatively for metamagnetic changes and the
magnetocaloric effect. For perfect stoichiometric B2-ordered
FeRh, we calculate the transition temperature of the
ferromagnetic-antiferromagnetic transition to be Tt= 495 K
and a maximum isothermal entropy change in 2 T of |ΔS|=21.1
J K−1 kg−1. A large $(40\%)$ component of |ΔS| is
electronic. The transition results from a fine balance of
competing electronic effects which is disturbed by small
compositional changes; e.g., swapping just $2\%$ Fe of
“defects” onto the Rh sublattice makes Tt drop by 290 K.
This hypersensitivity explains the narrow compositional
range of the transition and impurity doping effects.},
cin = {PGI-1 / IAS-1},
ddc = {530},
cid = {I:(DE-Juel1)PGI-1-20110106 / I:(DE-Juel1)IAS-1-20090406},
pnm = {422 - Spin-based and quantum information (POF2-422)},
pid = {G:(DE-HGF)POF2-422},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000332409800002},
doi = {10.1103/PhysRevB.89.054427},
url = {https://juser.fz-juelich.de/record/153871},
}