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  High-field spin-flop state in green dioptase

Prokhnenko, O., Marmorini, G., Nikitin, S. E., Yamamoto, D., Gazizulina, A., Bartkowiak, M., et al. (2021). High-field spin-flop state in green dioptase. Physical Review B, 103(1): 014427, pp. 1-12. doi:10.1103/PhysRevB.103.014427.

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 Creators:
Prokhnenko, O.1, Author
Marmorini, G.1, Author
Nikitin, S. E.2, Author              
Yamamoto, D.1, Author
Gazizulina, A.1, Author
Bartkowiak, M.1, Author
Ponomaryov, A.N.1, Author
Zvyagin, S. A.1, Author
Nojiri, H.1, Author
Diáz-Ortega, I. F.1, Author
Anovitz, L. M.1, Author
Kolesnikov, A. I.1, Author
Podlesnyak, A.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              

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 Abstract: The high-field magnetic properties and magnetic order of the gem mineral green dioptase Cu6[Si6O18]·6H2O have been studied by means of single-crystal neutron diffraction in magnetic fields up to 21 T and magnetization measurements up to 30 T. In zero field, the Cu2+ moments in the antiferromagnetic chains are oriented along the c axis with a small off-axis tilt. For a field applied parallel to the c axis, the magnetization shows a spin-flop-like transition at B∗=12.2 T at 1.5 K. Neutron diffraction experiments show a smooth behavior in the intensities of the magnetic reflections without any change in the periodicity of the magnetic structure. Bulk and microscopic observations are well described by a model of ferromagnetically coupled antiferromagnetic XXZ spin-12 chains, taking into account a change of the local easy-axis direction. We demonstrate that the magnetic structure evolves smoothly from a deformed Néel state at low fields to a deformed spin-flop state in a high field via a strong crossover around B∗. The results are generalized for different values of interchain coupling and spin anisotropy. © 2021 American Physical Society.

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Language(s): eng - English
 Dates: 2021-01-192021-01-19
 Publication Status: Published in print
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 Identifiers: DOI: 10.1103/PhysRevB.103.014427
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 103 (1) Sequence Number: 014427 Start / End Page: 1 - 12 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008