The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	g-factors for ternary crystals of groups iii and v
Author:	Mateescu, Liviu
View Online:	njit-etd2011-114 (ix, 26 pages ~ 0.6 MB pdf)
Department:	Department of Physics
Degree:	Master of Science
Program:	Applied Physics
Document Type:	Thesis
Advisory Committee:	Ravindra, N. M. (Committee chair) Fiory, Anthony (Committee member) Booty, Michael R. (Committee member) Shneidman, Vitaly A. (Committee member)
Date:	2011-05
Keywords:	g-factors Magnetic behavior Semiconductor materials
Availability:	Unrestricted
Abstract:	The objective of this thesis is to present a method of calculating the g-factors of ternary crystals of III-V group elements. There is an increasing interest in knowing the magnetic behavior of different semiconductor materials, due to advances in the domain of spintronics. The g-factors were calculated for the conduction electrons, since they have the greatest contribution to the magnetic properties of the crystal. The thesis presented here proposes a method to calculate the magnetic g-factor of whole families of crystals made of three elements, of the form A1-xBxC, for eleven values, x ε {0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9,1} , that were considered sufficient for giving an accurate behavior of the magnetic properties of the conduction electrons. The notion of g-factor is presented and then methods are shown that permit the calculation of the g-factor in cubic crystals. The algorithm is then applied to binary crystals and the results of calculations are compared to the scarce measurement data found in literature. Finally, relying on a series of papers that approximate the lattice parameters for ternary III-V crystals (cubic determination), the g-factor is calculated for the families of A1-xBxC for the x values mentioned above, and recommendations are given for an eventual enhancement of the precision. The method presented here is but a first approximation, that is considered good enough for applications in the spintronics of the cubic crystals.