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@ARTICLE{Jin:824352,
author = {Jin, Wentao and Xiao, Yinguo and Bukowski, Z. and Su, Y.
and Nandi, S. and Sazonov, A. P. and Meven, M. and Zaharko,
O. and Demirdis, S. and Nemkovskiy, Kirill and Schmalzl, K.
and Tran, Lan Maria and Guguchia, Z. and Feng, E. and Fu, Z.
and Brückel, Th.},
title = {{P}hase diagram of {E}u magnetic ordering in
{S}n-flux-grown {E}u ( {F}e 1 − x {C}o x ) 2 {A}s 2 single
crystals},
journal = {Physical review / B},
volume = {94},
number = {18},
issn = {2469-9950},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {FZJ-2016-06960},
pages = {184513},
year = {2016},
abstract = {The magnetic ground state of the Eu2+ moments in a series
of Eu(Fe1−xCox)2As2 single crystals grown from the Sn flux
has been investigated in detail by neutron diffraction
measurements. Combined with the results from the macroscopic
properties (resistivity, magnetic susceptibility and
specific heat) measurements, a phase diagram describing how
the Eu magnetic order evolves with Co doping in
Eu(Fe1−xCox)2As2 is established. The ground-state magnetic
structure of the Eu2+ spins is found to develop from the
A-type antiferromagnetic (AFM) order in the parent compound,
via the A-type canted AFM structure with some net
ferromagnetic (FM) moment component along the
crystallographic c direction at intermediate Co doping
levels, finally to the pure FM order at relatively high Co
doping levels. The ordering temperature of Eu declines
linearly at first, reaches the minimum value of 16.5(2) K
around x=0.100(4), and then reverses upwards with further Co
doping. The doping-induced modification of the indirect
Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between the
Eu2+ moments, which is mediated by the conduction d
electrons on the (Fe,Co)As layers, as well as the change of
the strength of the direct interaction between the Eu2+ and
Fe2+ moments, might be responsible for the change of the
magnetic ground state and the ordering temperature of the Eu
sublattice. In addition, for Eu(Fe1−xCox)2As2 single
crystals with 0.10≤x≤0.18, strong ferromagnetism from
the Eu sublattice is well developed in the superconducting
state, where a spontaneous vortex state is expected to
account for the compromise between the two competing
phenomena.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / JCNS-2 / PGI-4 / JARA-FIT},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
$I:(DE-82)080009_20140620$},
pnm = {524 - Controlling Collective States (POF3-524) / 6212 -
Quantum Condensed Matter: Magnetism, Superconductivity
(POF3-621) / 6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich
Centre for Neutron Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-524 / G:(DE-HGF)POF3-6212 /
G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)HEIDI-20140101 / EXP:(DE-MLZ)DNS-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000388816200012},
doi = {10.1103/PhysRevB.94.184513},
url = {https://juser.fz-juelich.de/record/824352},
}