Paramagnetic susceptibility of Bi-Mn alloys in the liquid state

• Published in: Journal of experimental and theoretical physics 2009-08, Vol.109 (2), p.269-273
• Main Authors: Uporov, S. A., Uporova, N. S., Sidorov, V. E., Mikula, A., Terzieff, P.
• Format: Article
• Language: English
• Subjects: Classical and Quantum Gravitation; Electronic Properties of Solid; Elementary Particles; Particle and Nuclear Physics; Physics; Physics and Astronomy; Quantum Field Theory; Relativity Theory; Solid State Physics
• ISSN: 1063-7761; 1090-6509
• DOI: 10.1134/S1063776109080111

The magnetic susceptibility of Bi 100 − x Mn x ( x = 5, 7.5, 10, 12.5, 15, 17.5, 20, 25) alloys is experimentally studied by the Faraday method in the temperature range T = 300−1200°C and the magnetic-field range B = 0.6−1.3 T. To calculate the electronic characteristics of the Bi-Mn alloys, the experimental results are approximated by the generalized Curie-Weiss law. The calculated parameters of the electronic structure of the alloys demonstrate that manganese is present in the melt in an ionic state with an effective magnetic moment μ eff ≈ 5μ B , all Bi-Mn alloys have negative paramagnetic temperatures (which indicate the antiferromagnetic character of the exchange between transition 3 d element atoms), and the density of states near the Fermi level n ( E F ) is low. Therefore, the Fermi level is outside the d band of manganese and its position is controlled by the sp band of bismuth.