Biesenkamp, S., Qureshi, N., Sidis, Y., Becker, P., Bohaty, L. and Braden, M. (2020). Structural dimerization in the commensurate magnetic phases of NaFe(WO4)(2) and MnWO4. Phys. Rev. B, 102 (14). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

The structural distortion and magnetoelastic coupling induced through commensurate magnetism has been investigated by neutron diffraction in structurally related MnWO4 and NaFe(WO4)(2). Both systems exhibit a competition of incommensurate spiral and commensurate spin up-up-down-down ordering along the magnetic chains. In the latter commensurate phases, the alternatingly parallel and antiparallel arrangement of Fe3+ or Mn2+ moments leads to sizable bond-angle modulation and thus to magnetic dimerization. For NaFe(WO4)(2) this structural distortion has been determined to be strongest for the low-field up-up-down-down arrangement, and the structural refinement yields a bond-angle modulation of +/- 1.15(16) degrees. In the commensurate phase of MnWO4, superstructure reflections signal a comparable structural dimerization and thus strong magneto-elastic coupling different to that driving the multiferroic order. Pronounced anharmonic second- and third-order reflections in the incommensurate and multiferroic phase of MnWO4 result from tiny commensurate fractions that can depin multiferroic domains.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Biesenkamp, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Qureshi, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sidis, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Becker, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bohaty, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Braden, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-314623
DOI: 10.1103/PhysRevB.102.144429
Journal or Publication Title: Phys. Rev. B
Volume: 102
Number: 14
Date: 2020
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9969
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed MatterMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/31462

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