scholarly journals Magnetic properties of Pb1-x-ySnxVyTe alloys

2018 ◽  
Vol 185 ◽  
pp. 06010
Author(s):  
Evgeny Skipetrov ◽  
Nikita Konstantinov ◽  
Liudmila Skipetrova ◽  
Alexander Knotko ◽  
Vasily Slynko
Keyword(s):  
Magnetic Properties ◽  
Electronic Structure ◽  
Theoretical Model ◽  
Single Crystal ◽  
Crystal Lattice ◽  
Impurity Concentration ◽  
Bridgman Method ◽  
Structure Rearrangement ◽  
Temperature Dependences ◽  
Vanadium Ions

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 Pb1-x-ySnxVyTe (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 Pb1-x-ySnxVyTe 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.

scholarly journals Кинетика изменения концентраций магнитных ионов примеси в сплавах Pb-=SUB=-1-x-y-=/SUB=-Sn-=SUB=-x-=/SUB=-V-=SUB=-y-=/SUB=-Te при легировании

2018 ◽  
Vol 52 (7) ◽  
pp. 686
Author(s):  
Е.П. Скипетров ◽  
Н.С. Константинов ◽  
Л.А. Скипетрова ◽  
А.В. Кнотько ◽  
В.Е. Слынько
Keyword(s):  
Electronic Structure ◽  
Crystal Lattice ◽  
X Ray ◽  
Structure Rearrangement ◽  
Galvanomagnetic Properties ◽  
Temperature Dependences ◽  
Stockbarger Method ◽  
Diamagnetic Contribution ◽  
Magnetic States ◽  
Vanadium Ions

AbstractThe field and temperature dependences of the magnetization (magnetic fields B ≤ 7.5 T, temperatures T = 2.0–75 K) of samples from a Pb_1– x – y Sn_ x V_ y Te ( x = 0.08, y = 0.01) single-crystal ingot synthesized by the Bridgman–Stockbarger method. It is established that the sample magnetization contains two main contributions, notably, the paramagnetism of vanadium ions and diamagnetism of the crystal lattice. The field and temperature dependences of the magnetization are approximated by the sum of modified Brillouin functions corresponding to the paramagnetic contributions of vanadium in two different charge states and the diamagnetic contribution linear in terms of field. The concentrations of vanadium ions in two different magnetic states and the character of their variation along the ingot are determined within the scope of the alloy’s electronic-structure rearrangement because of doping. The results are compared with the data of X-ray fluorescence microanalysis and the results of studying the galvanomagnetic properties of the samples.

TEMPERATURE-DEPENDENT ELECTRONIC STRUCTURE AND MAGNETIC BEHAVIOUR OF MOTT INSULATORS

1993 ◽  
Vol 07 (01n03) ◽  
pp. 333-336
Author(s):  
W. NOLTING ◽  
L. HAUNERT ◽  
G. BORSTEL
Keyword(s):  
Magnetic Properties ◽  
Electronic Structure ◽  
Theoretical Model ◽  
Transition Metal ◽  
Magnetic Behaviour ◽  
Mott Insulators ◽  
Temperature Dependent ◽  
Electronic And Magnetic Properties ◽  
Coulomb Correlations

The temperature-dependent electronic and magnetic properties of transition metal monoxides are calculated by use of a theoretical model which takes into account strong 3d Coulomb correlations and 2p-3d hybridization.

scholarly journals Магнитные свойства сплавов Pb-=SUB=-1-y-=/SUB=-Sс-=SUB=-y-=/SUB=-Te

2021 ◽  
Vol 55 (12) ◽  
pp. 1167
Author(s):  
Е.П. Скипетров ◽  
Е.В. Богданов ◽  
Л.А. Скипетрова ◽  
А.А. Соловьев ◽  
А.В. Кнотько ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electronic Structure ◽  
Crystal Lattice ◽  
Magnetic Moment ◽  
Impurity Concentration ◽  
Unit Volume ◽  
Average Concentration ◽  
Free Electrons ◽  
Metal Sublattice ◽  
The Magnetic Field

The magnetic field dependences of the magnetization (B < 9 Т, T = 2.0 - 70 K) of the samples from a single crystal Pb1-yScyTe (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.

Electronic Structure and Magnetic Properties of a HoPdAl Single Crystal.

ChemInform ◽  
2003 ◽  
Vol 34 (48) ◽  
Author(s):  
E. Talik ◽  
M. Skutecka ◽  
J. Kusz ◽  
H. Boehm ◽  
T. Mydlarz
Keyword(s):  
Magnetic Properties ◽  
Electronic Structure ◽  
Single Crystal

Galvanomagnetic and Magnetic Properties of Pb1-yScyTe

2015 ◽  
Vol 233-234 ◽  
pp. 97-100 ◽  
Author(s):  
E.P. Skipetrov ◽  
M.M. Markina ◽  
K.V. Zakharov ◽  
L.A. Skipetrova ◽  
A.A. Solovev ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Electronic Structure ◽  
Impurity Content ◽  
Free Electron Concentration ◽  
Resonant Level ◽  
Structure Rearrangement ◽  
Galvanomagnetic Properties ◽  
Weak Magnetic Fields ◽  
Heavily Doped

The galvanomagnetic properties in weak magnetic fields (4.2≤T≤300 K, B≤0.07 T) as well as magnetic properties (2≤T≤300 K, B≤9 T) of the single-crystal Pb1-yScyTe (y≤0.02) alloys have been investigated. We find that an increase of Sc impurity content leads to a monotonous growth of the free electron concentration (from 1016 cm-3 to 1020 cm-3). In heavily doped alloys (y>0.01), it tends to saturation, indicating the pinning of the Fermi energy by the scandium resonant level located inside the conduction band. The energy of the level is estimated (ESc≈Ec+280 meV) and the model of electronic structure rearrangement of Pb1-yScyTe alloys with doping is proposed. In the frame of this model, using experimental temperature and magnetic field dependences of magnetization, the concentrations of magnetically active scandium ions are determined and connection of the electronic structure with the magnetic properties of the alloys are discussed.

scholarly journals Термический коэффициент движения резонансного уровня железа в сплавах Pb-=SUB=-1-x-y-=/SUB=-Sn-=SUB=-x-=/SUB=-Fe-=SUB=-y-=/SUB=-Te

2019 ◽  
Vol 53 (11) ◽  
pp. 1459
Author(s):  
Е.П. Скипетров ◽  
Б.Б. Ковалев ◽  
Л.А. Скипетрова ◽  
А.В. Кнотько ◽  
В.Е. Слынько
Keyword(s):  
Electronic Structure ◽  
Valence Band ◽  
Hall Coefficient ◽  
Iron Level ◽  
Anomalous Temperature ◽  
Resonant Level ◽  
Structure Rearrangement ◽  
Temperature Dependences ◽  
Normal Spectrum ◽  
Increasing Temperature

The phase composition, the elemental composition and temperature dependences of the resistivity and of the Hall coefficient (temperature interval 4.2≤T≤300K, magnetic fields B≤0.07 T) in Pb1−x−ySnxFeyTe alloys are studied at variation of the tin and iron concentrations along the single-crystal ingots synthesized by the Bridgman−Stockbarger technique. The distributions of tin and iron along the ingots are obtained and anomalous temperature dependences of the Hall coefficient, associated with the pinning of the Fermi level by the resonant level of iron, located in the valence band, are found. The analysis of the experimental results is carried out in the framework of the model of the electronic structure rearrangement, involving the movement of the iron level relative to the top of the valence band with increasing tin concentration and temperature. The temperature coefficient of the movement of the level of iron with respect to the middle of the gap is determined and the possible diagrams for the rearrangement of the electronic structure with increasing temperature in the alloys with normal spectrum (0.06≤x≤0.35) are proposed.

Electronic structure and magnetic properties of a HoPdAl single crystal

2003 ◽  
Vol 359 (1-2) ◽  
pp. 103-108 ◽  
Author(s):  
E Talik ◽  
M Skutecka ◽  
J Kusz ◽  
H Böhm ◽  
T Mydlarz
Keyword(s):  
Magnetic Properties ◽  
Electronic Structure ◽  
Single Crystal
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