Journal Article

FZJ-2021-05252

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Single-crystal investigations on the multiferroic material LiFe(WO$_4$)$_2$

Biesenkamp, S. (Corresponding author) ; Gorkov, D. ; Brüning, D. ; Bertin, A. ; Fröhlich, T. ; Fabrèges, X. ; Gukasov, A. ; Meven, M.FZJ*RWTH* ; Becker, P. ; Bohatý, L. ; Lorenz, T. ; Braden, M.

2021
Inst. Woodbury, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/29577  doi:10.1103/PhysRevB.103.134412

Abstract: 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.

Keyword(s): Magnetic Materials (1st) ; Condensed Matter Physics (2nd) ; Magnetism (2nd) ; Crystallography (2nd)

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Contributing Institute(s):

1. JCNS-FRM-II (JCNS-FRM-II)
2. JARA-FIT (JARA-FIT)
3. Heinz Maier-Leibnitz Zentrum (MLZ)
4. Streumethoden (JCNS-2)
5. Energiesystem: Integration (PTJ-ESI)

Research Program(s):

1. 6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4) (POF4-6G4)

Experiment(s):

1. HEiDi: Single crystal diffractometer on hot source (SR9b)
2. KOMPASS: Cold three axes spectrometer with polarization analysis (NL1)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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