RT Journal Article
ID 5b58bee52735b9b3
A1 Bekirov, B.E.
A1 Ivanchenko, I. V.
A1 Popenko, N. A.
A1 Bludov, A. V.
A1 Pashchenko, V.
T1 THE FEATURES OF QUANTUM OSCILLATIONS OF THE MAGNETIZATION OF HgSe: Fe CRYSTALS
JF Telecommunications and Radio Engineering
JO TRE
YR 2014
FD 2014-12-05
VO 73
IS 16
SP 1433
OP 1442
K1 diluted magnetic semiconductor
K1 magnetization
K1 spin splitting
K1 hybridized states
AB In this paper, the experimental studies of magnetic-field and temperature dependences of the magnetization of HgSe:Fe crystals with the iron concentrations 2×1018 cm−3≤NFe≤3×1019 cm−3 are carried out. It has been found that at helium temperatures the quantum oscillations of the magnetization are observed for all samples in the magnetic fields H ≥ 15 kOe, whose amplitude decreases monotonically with increasing the temperature up to T = 25 K due to the thermal smearing of the Fermi level. The effective area of extreme sections of the Fermi surface is defined and the concentration of collectivized electrons under conditions of the Fermi level stabilization at the resonant donor level of the iron is estimated. For the first time, the spin splitting of the Landau levels in the quantum oscillations of the de Haas - van Alphen has been revealed at the concentration of the iron impurity within the limits of 7×1018cm−3<NFe<2×1019cm−3. The critical impurity concentration has been determined at which there is a sharp increase in the Curie-Weiss temperature, indicating the occurrence of spontaneous spin polarization of the hybridized electron states in the mercury selenide doped with an iron.
PB Begell House
LK https://www.dl.begellhouse.com/journals/0632a9d54950b268,50ecbf056e787661,5b58bee52735b9b3.html