Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

High-field spin-flop state in green dioptase


Nikitin,  S. E.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

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.

Cite as: https://hdl.handle.net/21.11116/0000-0008-032C-4
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.