Abstract
The structure and electrical resistance of the alloy Ni45Mn46In9 were studied. At room temperature, Ni45Mn46In9 is ordered into the cubic structure L21, characteristic of Heusler alloys. Throughout the entire temperature range from 77 to 1100 K, a large specific resistance and negative temperature coefficient of resistance are observed. Conductivity obeys Mott’s law T–1/4 with the addition of a metal contribution. The specific features observed in the temperature dependence of the electrical resistance curve suggest that in this alloy the phase transition between the cubic austenitic phase and martensitic phase with lower symmetry, characteristic of ferromagnetic nonstoichiometric Heusler alloys, occurs at an unusually high temperature.
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ACKNOWLEDGMENTS
The authors thank V.V. Marchenkov for providing samples, V.S. Gaviko for X-ray diffraction studies, and A.F. Prekul for help with sample annealing and useful discussions.
Funding
The study was carried out within the state task of the Ministry of Science and Higher Education of the Russian Federation (topic “Spin” no. 122021000036-3).
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Volkova, N.V., Chistyakov, V.V., Patrakov, E.I. et al. Electrical Resistivity of the Ni45Mn46In9 Alloy. High Temp 61, 173–177 (2023). https://doi.org/10.1134/S0018151X23020207
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DOI: https://doi.org/10.1134/S0018151X23020207