%0 Journal Article
%A Biesenkamp, S.
%A Gorkov, D.
%A Brüning, D.
%A Bertin, A.
%A Fröhlich, T.
%A Fabrèges, X.
%A Gukasov, A.
%A Meven, M.
%A Becker, P.
%A Bohatý, L.
%A Lorenz, T.
%A Braden, M.
%T Single-crystal investigations on the multiferroic material LiFe(WO$_4$)$_2$
%J Physical review / B
%V 103
%N 13
%@ 1098-0121
%C Woodbury, NY
%I Inst.
%M FZJ-2021-05252
%P 134412
%D 2021
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000646301700005
%R 10.1103/PhysRevB.103.134412
%U https://juser.fz-juelich.de/record/903598