THERMAL AND MAGNETIC PROPERTIES OF THE Ag8Ge1-xMnxTe6 SOLID SOLUTION
1R.N. Rahimov, 1A.S. Kahramanova, 1D.G. Arasly, 1A.A. Khalilova, 1I.Kh. Mamedov, 3A.M. Jivulko, 3V.I. Mityuk
2024   04   az   p.36-42

ABSTRACT

Ag8Ge1-xMnxTe6 (x=0, 0.05, 0.1, 0.2) solid solutions were obtained by alloying at a temperature of 1250 K and then ground into powder. Parallelepiped-shaped samples were obtained by pressing them in a 2x4x15 cm3 mold under a pressure of 0.6 GPa. The obtained samples were aged by keeping them at a temperature of 900 K for 50 hours. X-ray diffraction and calorimetric analyses of the samples were performed. The thermal diffusivity of the samples was measured by light pulse and the thermal conductivity was calculated based on the obtained values. Since the phonon mean free path in crystals is 2-3 times less than the lattice constant (11.58 Å), heat is mainly transferred through energy exchange between neighboring atoms, and the observed increase in thermal conductivity depending on temperature is due to the contribution of the charge carrier. In the Ag8Ge0.8Mn0.2Te6 crystal the specific magnetization in the temperature range of 80–750 K, as well as at temperatures of 5, 40, 80 and 300 K, the dependence of the specific magnetization on the magnetic field (σm=f(M) have been studied. The temperature of the phase transition "Magnetic order – magnetic disorder" was determined.

Keywords: X-ray analysis, thermal conductivity, specific magnetization, magnetic susceptibility, coercive force
DOI:10.70784/azip.2.2024436

Received: 20.12.2024
Internet publishing: 25.12.2024

AUTHORS & AFFILIATIONS

1. Institute of Physics Ministry of Science and Education Republic of Azerbaijan, 131 H.Javid ave, Baku, AZ-1073, Azerbaijan
2. Azerbaijan National Aviation Academy, 25 Bina st., Baku, AZ 1045
3. ”Scientific and Practical Center of the National Academy of Sciences of Belarus for Materials Science”, Minsk, 220072, Belarus
E-mail:

Graphics and Images

                             

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