EPJ Web of Conferences 185, 06010 (2018)
https://doi.org/10.1051/epjconf/201818506010

Magnetic properties of Pb₁-_x-_ySn_xV_yTe alloys

¹ M.V. Lomonosov Moscow State University, Faculty of Physics, 119991 Moscow, Russia
² M.V. Lomonosov Moscow State University, Faculty of Chemistry, 119991 Moscow, Russia
³ I.M. Frantsevich Institute of Materials Science Problems, NAS of Ukraine, 58001 Chernivtsi, Ukraine

^* Corresponding author : skip@mig.phys.msu.ru

Published online: 4 July 2018

Abstract

We study the field and temperature dependences of the magnetization (B≤7.5 T, T=2.0-75 K) of samples from a single crystal Pb_1-x-ySn_xV_yTe (x=0.08, y=0.01) ingot synthesized by the Bridgman method. It is established that the magnetization of the samples contains two main contributions: the Brillouin-type paramagnetism of vanadium ions and the diamagnetism of the crystal lattice. Experimental field and temperature dependences of the magnetization are discussed in the framework of a theoretical model of electronic structure rearrangement in Pb_1-x-ySn_xV_yTe with doping and approximated as the sums of two terms based on the modified Brillouin functions for vanadium ions in the V₃₊ and V₂₊ states. The concentrations of magnetically active vanadium ions in two different charge states with increasing impurity concentration along the ingot are determined.