Bound magnetic polarons inp-typeCu2Mn0.9

Magnetic properties of co-doped SnO2 diluted magnetic semiconductors

“…The value of m eff and N are found to be in the order of 10 -20 J/T and 10 21 per m 3 respectively and they are comparable to those reported by Quintero et al [22], in Cu 2 FeGeTe 4 DMS. However, the present m eff value is found to be one order of magnitude larger than that reported in Cu 2 Mn 0.9 Zn 0.1 SnS 4 and Y 0.9 Ce 0.1 MnO 3 [19,23]. The solid lines represent the polaron model fit.…”

“…As the temperature is reduced, there is a considerable increase in hysteresis loss due to possible enhancement in magnetic anisotropy or other competing magnetic interaction. In order to further understand the magnetic properties, we have fitted the measured initial M-H curve in terms of bound magnetic polaron (BMP) model by following refs [19][20][21] where .…”

Lattice parameters values and phase diagram for the Cu2Zn1−zFezGeSe4 alloy system

“…Regarding to the magneto-optical properties of MSM, it has been suggested [5,6] that another set of magnetic compounds and alloys, which could show larger magneto-optical effect than the II-VI derived alloys, can be obtained from the tetrahedral bonded I 2 -II-IV-VI 4 compounds by replacing the II cations with Mn, Fe, Co and/or Ni ions. The crystal structure of various I 2 -II-IV-VI 4 compounds has been investigated by several authors [1,[4][5][6]. In recent work, lattice parameter values, phase transitions, annealing temperature and cooling rates for the Cu 2 Cd 1−z Mn z GeSe 4 and Cu 2 Cd 1−z Fe z GeSe 4 alloy systems have been studied [7].…”

Ferromagnetism in Mechanically Milled Sn1−x Co x O2 (x=0 to 0.10) Compounds

“…At relatively high temperature, the interaction between BMPs can be ignored and m s = m eff can be taken [35]. χ m is the susceptibility of the matrix.…”

“…The intrinsic saturation magnetization, M si was determined from the above plots and are found to be 2.9 emu/g, 2.6 emu/g, 2.2 emu/g for x = 0.02, 0.07, and 0.10 samples, respectively, at 290 K. Their corresponding values at 20 K are found to be 5.9 emu/g, 4.9 emu/g, and 3.3 emu/g. The data were analyzed in terms of bound magnetic polaron model (BMP) [35][36][37], i.e., by fitting to the following equation…”