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@ARTICLE{Altynbaev:824265,
author = {Altynbaev, E. and Siegfried, S.-A. and Moskvin, E. and
Menzel, D. and Dewhurst, C. and Heinemann, A. and
Feoktystov, A. and Fomicheva, L. and Tsvyashchenko, A. and
Grigoriev, S.},
title = {{H}idden quantum phase transition in {M}n$_{1−x}$
{F}e$_{x}$ {G}e evidenced by small-angle neutron scattering},
journal = {Physical review / B},
volume = {94},
number = {17},
issn = {2469-9950},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {FZJ-2016-06884},
pages = {174403},
year = {2016},
abstract = {The magnetic system of the Mn1−xFexGe solid solution is
ordered in a spiral spin structure in the whole
concentration range of x∈[0÷1]. The close inspection of
the small-angle neutron-scattering data reveals the quantum
phase transition from the long-range ordered to short-range
ordered helical structure upon increase of Fe concentration
at x∈[0.25÷0.4]. The short-range order (SRO) of the
helical structure is identified as a Lorentzian
contribution, while long-range order is associated with the
Gaussian contribution into the scattering profile function.
The scenario of the quantum phase transition with x as a
driving parameter is similar to the thermal phase transition
in pure MnGe. The quantum nature of the SRO is proved by the
temperature-independent correlation length of the helical
structure at low- and intermediate-temperature ranges with
remarkable decrease above certain temperature TQ. We suggest
the x-dependent modification of the effective
Ruderman-Kittel-Kasuya-Yosida exchange interaction within
the Heisenberg model of magnetism to explain the quantum
critical regime in Mn1−xFexGe.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / JCNS-2 / PGI-4},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106},
pnm = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
Neutron Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)KWS1-20140101 / EXP:(DE-MLZ)SANS-1-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000386656100003},
doi = {10.1103/PhysRevB.94.174403},
url = {https://juser.fz-juelich.de/record/824265},
}