TY  - JOUR
AU  - Jin, Wentao
AU  - Qureshi, N.
AU  - Bukowski, Z.
AU  - Xiao, Y.
AU  - Nandi, S.
AU  - Babij, M.
AU  - Fu, Z.
AU  - Su, Y.
AU  - Brückel, Th.
TI  - Spiral magnetic ordering of the Eu moments in EuNi$_2$As$_2$
JO  - Physical review / B
VL  - 99
IS  - 1
SN  - 2469-9950
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2019-00744
SP  - 014425
PY  - 2019
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000456299700008
DO  - DOI:10.1103/PhysRevB.99.014425
UR  - https://juser.fz-juelich.de/record/859932
ER  -