Inclusions of metastable superconducting phase of gallium in SmGa2
https://doi.org/10.17586/2220-8054-2025-16-5-593-596
Abstract
The magnetization M of the SmGa2 compound has a paramagnetic character in a wide temperature range, and when the temperature decreases below 30 K, a significant increase in magnetization is observed, which indicates the formation of a magnetically ordered state. At temperatures below 5 K, a sharp feature is observed on the M(H) dependences, which is the contribution from the magnetization of superconducting submicron gallium inclusions. Analysis of the M(H) dependences measured at different temperatures below 5 K allowed us to assume the presence of two superconducting gallium phases. The critical temperature TC = 5.9 K and the critical field HC (0) = 560 Oe correspond to the formation of a metastable β-phase of gallium, and the critical temperature TC = 8.4 K and the critical field HC (0) = 1100 Oe can be associated with the formation of a thin layer of amorphous gallium on the surface of the β-phase inclusions.
About the Authors
A. E. Shitov
Ioffe Institute
Russian Federation
Russian Federation
Alexander E. Shitov
26 Politekhnicheskaya st., Saint Petersburg, 194021
M. P. Volkov
Ioffe Institute
Russian Federation
Russian Federation
Mikhail P. Volkov
26 Politekhnicheskaya st., Saint Petersburg, 194021
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For citations:
Shitov A.E., Volkov M.P. Inclusions of metastable superconducting phase of gallium in SmGa2. Nanosystems: Physics, Chemistry, Mathematics. 2025;16(5):593-596. https://doi.org/10.17586/2220-8054-2025-16-5-593-596
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