%0 Journal Article
%A Jin, Wentao
%A Qureshi, N.
%A Bukowski, Z.
%A Xiao, Y.
%A Nandi, S.
%A Babij, M.
%A Fu, Z.
%A Su, Y.
%A Brückel, Th.
%T Spiral magnetic ordering of the Eu moments in EuNi$_2$As$_2$
%J Physical review / B
%V 99
%N 1
%@ 2469-9950
%C Woodbury, NY
%I Inst.
%M FZJ-2019-00744
%P 014425
%D 2019
%X The ground-state magnetic structure of EuNi2As2 was investigated by single-crystal neutron diffraction. At base temperature, the Eu2+ moments are found to form an incommensurate antiferromagnetic spiral-like structure with a magnetic propagation vector of k=(0,0,0.92). They align ferromagnetically in the ab plane with the moment size of 6.75(6) μB, but rotate spirally by 165.6(1)∘ around the c axis from layer to layer. The magnetic order parameter in the critical region close to the ordering temperature TN=15 K shows critical behavior with a critical exponent of βEu=0.35(2), consistent with the three-dimensional Heisenberg model. Moreover, within the experimental uncertainty, our neutron data are consistent with a model in which the Ni sublattice is not magnetically ordered.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000456299700008
%R 10.1103/PhysRevB.99.014425
%U https://juser.fz-juelich.de/record/859932