Phase Transition and Anharmonic Properties of Semimagnetic Semiconductors

Abstract

The phase transition and anharmonic properties are investigated of semimagnetic semiconductors Cdl-&,Te and Cdl-,Zn,Te using a three-body force potential. The calculated values of third order elastic constants follow a systematic trend of variation with molar concentration. The values of the phase transition pressures and the pressure derivatives of second order elastic constants show reasonably good agreement with their experimental data. The possible ways of improvements are also discussed.Der Phasenubergang und die anharmonischen Eigenschaften der semmagnetischen Halbleiter Cdl-,Mn,Te und Cdl -,Zn,Te werden mit einem Dreikorperkraftpotential untersucht. Die berechneten Werte der elastischen Konstanten dritter Ordnung folgen einem systematischen Trend der Anderung mit der molaren Konzentration. Die Werte des Phasenubergangsdrucks und der Druckableitungen der elastischen Konstanten aweiter Ordnung zeigen vernunftige Ubereinstimmung rnit ihren experimentellen Werten. Mogliche Wege der Verbesserung werden ebenfalls diskutiert.

Thermophysical and Ultrasonic Properties on Magnesium Oxide

“…The Complete lattice dynamical, thermodynamical property and density of state curve of MgOtheoretically reported has agreed with different reported data [15][16][17][18][19][20][21][22][23][24][25][26]. The authors and more researchers have already used the present model and successfully reported the value of alkali halides and semiconductor materials [31][32][33][34][35][36][37].To sum up, we can say that the contributions of VWI and TBI are essential for the description of the lattice dynamics and thermodynamical study of MgO.…”

Mechanical, elastic and anharmonic properties of zinc blende MgS compound

“…Looking to the good description of elastic properties, we have extended our investigation to the determination of anharmonic properties, namely the TOEC and pressure derivatives of SOEC such as dB/dP, dS/dP and dC 44 /dP using the expression given in Ref. [12]. The results are given in Tables 4 and 5.…”

“…The details of the three-body interaction potential and method of calculation adopted in the present paper are presented elsewhere [12,13]. Here, we briefly outline some of the useful features of the three-body interaction potential.…”

“…Here, we briefly outline some of the useful features of the three-body interaction potential. The potential energy in the framework of the three-body interaction potential for the MgS crystal is expressed as [12] 2 2 , ,…”

“…This modified charge is considered as a model parameter. This three-body potential approach is quite successful in explaining the physical properties in several compounds of ZB structure [12,13]. This paper is divided as follows.…”