|
Electronic properties of semiconductors
Magnetic properties of Pb$_{1-y}$Sс$_{y}$Te alloys
E. P. Skipetrova, E. V. Bogdanova, L. A. Skipetrovaa, A. A. Solov'eva, A. V. Knotkobc, V. E. Slynkod a Faculty of Physics, Lomonosov Moscow State University
b Lomonosov Moscow State University, Faculty of Materials Science
c Lomonosov Moscow State University, Faculty of Chemistry
d Frantsevich Institute of Materials Science Problems, National Academy of Sciences of Ukraine, Kiev
Abstract:
The magnetic field dependences of the magnetization ($B<$ 9 Т, $T$ = 2.0–70 K) of the samples from a single crystal Pb$_{1-y}$Sс$_{y}$Te ($y$ = 0.01) ingot, synthesized by the Bridgman method, are studied. It is established that, in accordance with the generally accepted model of the rearrangement of the electronic structure of alloys during doping, there is no paramagnetic contribution of single scandium ions located in the nodes of the metal sublattice in the studied samples. The magnetization of the samples contains several contributions: superparamagnetism of scandium clusters, linear in field diamagnetism of the crystal lattice and the paramagnetism of free electrons, as well as the oscillating contribution of the de Haas–van Alphen effect. The field dependences of the main contribution of scandium clusters are successfully approximated using the Langevin function. The average concentration, magnetic moment and the total magnetic moment of the clusters per unit volume of the sample were determined with an increase in the impurity concentration along the ingot.
Keywords:
PbTe-based alloys, 3$d$-transition metal impurities, rearrangement of electronic structure, field dependences of magnetization, superparamagnetism of scandium clusters.
Received: 26.07.2021 Revised: 02.08.2021 Accepted: 02.08.2021
Citation:
E. P. Skipetrov, E. V. Bogdanov, L. A. Skipetrova, A. A. Solov'ev, A. V. Knotko, V. E. Slynko, “Magnetic properties of Pb$_{1-y}$Sс$_{y}$Te alloys”, Fizika i Tekhnika Poluprovodnikov, 55:12 (2021), 1167–1175
Linking options:
https://www.mathnet.ru/eng/phts4912 https://www.mathnet.ru/eng/phts/v55/i12/p1167
|
Statistics & downloads: |
Abstract page: | 81 | Full-text PDF : | 28 |
|