Open AccessMagnetization and susceptibility of diluted magnetic semiconductor Hg0.89Mn0.11Te
Author(s) -
Zewen Wang,
Jie Wang
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.1141
Subject(s) - condensed matter physics , magnetization , curie–weiss law , magnetometer , antiferromagnetism , paramagnetism , squid , materials science , magnetic susceptibility , brillouin and langevin functions , curie's law , superconductivity , curie temperature , magnetic field , magnetic semiconductor , physics , ferromagnetism , ecology , quantum mechanics , biology
The magnetization measurements of Hg0.89Mn0.11Te sample grown by vertical Bridgman method have been carried out at 5 K under external field from -5200 to 5200 kA/m, and at 800 kA/m from 5 to 300 K with zero-field-cooling and field-cooling respectively using the superconducting quantum interference device (SQUID) magnetometer. Based on the mean field theory, a modified Brillouin function is well fitted with the data of magnetization vs magnetic field over the entire magnetic field range. The analysis indicates that there is an antiferromagnetic exchange coupling between Mn ions. The results of reciprocal susceptibility vs temperature show Curie-Weiss behaviors at temperatures above 40 K and a deviation from the Curie-Weiss law at temperatures from 5 to 40 K, which shows that the antiferromagnetic exchange coupling between Mn ions increases with decreasing temperature. The result was explained by extending higher-order terms in the calculation of susceptibility. Hg0.89Mn0.11Te is a paramagnetic material in temperature range from 5 to 300 K.