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Low-Dimensional Magnetism in Namibite Cu(BiO)2VO4OH
- Authors: Shvanskaya L.V1,2, Bushneva T.D1, Ivanova A.G3, Pchelkina Z.V4,5, Vasil'chikova T.M1,2, Volkova O.S1,2, Vasil'ev A.N1,2
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Affiliations:
- Moscow State University
- National Research Technological University MISIS
- Federal Research Center “Crystallography and Photonics,” Russian Academy of Sciences
- Ural Federal University
- Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
- Issue: Vol 164, No 4 (2023)
- Pages: 599-606
- Section: Articles
- URL: https://filvestnik.nvsu.ru/0044-4510/article/view/653639
- DOI: https://doi.org/10.31857/S0044451023100127
- EDN: https://elibrary.ru/XRAJQZ
- ID: 653639
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Abstract
A synthetic analog of rare secondary mineral namibite Cu(BiO)2VO4OH has been obtained by the hydrothermal method. The crystal structure of this compound contains isolated uniform chains of vertex-connected copper–oxygen octahedra. Magnetic susceptibility (χ) and magnetization (M) measurements have not indicated the long-range order in the temperature interval 2–300 K. Specific heat (Cp) measurements suggest the formation of a spin-liquid state at low temperatures. X-band electron paramagnetic resonance data recorded at low temperatures have demonstrated only a signal from impurities. First-principles calculations have estimated the exchange interaction in the chains as J = 555 K, whereas exchange interactions between the chains turn out to be one to two orders of magnitude smaller. Thus, namibite represents a rare example of an unordered half-integer spin chain.
About the authors
L. V Shvanskaya
Moscow State University; National Research Technological University MISIS
Email: lshvanskaya@mail.ru
119991, Moscow, Russia; 119049, Moscow, Russia
T. D Bushneva
Moscow State University
Email: lshvanskaya@mail.ru
119991, Moscow, Russia
A. G Ivanova
Federal Research Center “Crystallography and Photonics,” Russian Academy of Sciences
Email: lshvanskaya@mail.ru
119333, Moscow, Russia
Z. V Pchelkina
Ural Federal University; Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: lshvanskaya@mail.ru
620002, Yekaterinburg, Russia; 620900, Yekaterinburg, Russia
T. M Vasil'chikova
Moscow State University; National Research Technological University MISIS
Email: lshvanskaya@mail.ru
119991, Moscow, Russia; 620002, Yekaterinburg, Russia
O. S Volkova
Moscow State University; National Research Technological University MISIS
Email: lshvanskaya@mail.ru
119991, Moscow, Russia; 119049, Moscow, Russia
A. N Vasil'ev
Moscow State University; National Research Technological University MISIS
Author for correspondence.
Email: anvas2000@yahoo.com
119991, Moscow, Russia; 119049, Moscow, Russia
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