TY  - JOUR
AU  - Biesenkamp, S.
AU  - Gorkov, D.
AU  - Brüning, D.
AU  - Bertin, A.
AU  - Fröhlich, T.
AU  - Fabrèges, X.
AU  - Gukasov, A.
AU  - Meven, M.
AU  - Becker, P.
AU  - Bohatý, L.
AU  - Lorenz, T.
AU  - Braden, M.
TI  - Single-crystal investigations on the multiferroic material LiFe(WO$_4$)$_2$
JO  - Physical review / B
VL  - 103
IS  - 13
SN  - 1098-0121
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2021-05252
SP  - 134412
PY  - 2021
AB  - The crystal and magnetic structure of multiferroic LiFe(WO4)2 were investigated by temperature and magnetic-field dependent specific heat, susceptibility and neutron diffraction experiments on single crystals. Considering only the two nearest-neighbour magnetic interactions, the system forms a J1, J2 magnetic chain but more extended interactions are sizeable. Two different magnetic phases exhibiting long-range incommensurate order evolve at TN1 $\sim$ 22.2K and TN2 $\sim$19 K. First, a spin-density wave develops with moments lying in the ac plane. In its multiferroic phase below TN2, LiFe(WO4)2 exhibits a spiral arrangement with an additional spin-component along b. Therefore, the inverse Dzyaloshinskii-Moriya mechanism fully explains the multiferroic behavior in this material. A partially unbalanced multiferroic domain distribution was observed even in the absence of an applied electric field. For both phases only a slight temperature dependence of the incommensurability was observed and there is no commensurate phase emerging at low temperature or at finite magnetic fields up to 6 T. LiFe(WO4)2 thus exhibits a simple phase diagram with the typical sequence of transitions for a type-II multiferroic material.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000646301700005
DO  - DOI:10.1103/PhysRevB.103.134412
UR  - https://juser.fz-juelich.de/record/903598
ER  -