Enviar artigo por via de e-mail Nizkorazmernyy magnetizm v namibite Cu(BiO)2VO4OH
- Autores: Shvanskaya L.1,2, Bushneva T.1, Ivanova A.3, Pchelkina Z.4,5, Vasil'chikova T.1,2, Volkova O.1,2, Vasil'ev A.1,2
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Afiliações:
- 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
- Edição: Volume 164, Nº 4 (2023)
- Páginas: 599-606
- Seção: Articles
- URL: https://journals.rcsi.science/0044-4510/article/view/247331
- DOI: https://doi.org/10.31857/S0044451023100127
- EDN: https://elibrary.ru/XRAJQZ
- ID: 247331
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Resumo
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.
Sobre autores
L. Shvanskaya
Moscow State University; National Research Technological University MISIS
Email: lshvanskaya@mail.ru
119991, Moscow, Russia; 119049, Moscow, Russia
T. Bushneva
Moscow State University
Email: lshvanskaya@mail.ru
119991, Moscow, Russia
A. Ivanova
Federal Research Center “Crystallography and Photonics,” Russian Academy of Sciences
Email: lshvanskaya@mail.ru
119333, Moscow, Russia
Z. 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. Vasil'chikova
Moscow State University; National Research Technological University MISIS
Email: lshvanskaya@mail.ru
119991, Moscow, Russia; 620002, Yekaterinburg, Russia
O. Volkova
Moscow State University; National Research Technological University MISIS
Email: lshvanskaya@mail.ru
119991, Moscow, Russia; 119049, Moscow, Russia
A. Vasil'ev
Moscow State University; National Research Technological University MISIS
Autor responsável pela correspondência
Email: anvas2000@yahoo.com
119991, Moscow, Russia; 119049, Moscow, Russia
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