Study of Magnetization and Specific Heat Capacity of Multiferroic Two Dimensional Thin Film

Berhanu, Tamirat (2013) Study of Magnetization and Specific Heat Capacity of Multiferroic Two Dimensional Thin Film. Masters thesis, Addis Ababa University.

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Abstract

In the first chapter of this work contain the introduction, defintion and orgin of multiferroics. Second and thrid chapters include the formulation of Heisenberg Model , variation of dispresion, magnetization, specific heat capacity and the fourth chapter contains the conclusion. Generally, multiferroics are novel classes of materials that exhibit cross-coupling of mutually excluding phenomena, i.e. magnetism and ferroelectricity. In recent years, the coexistence of ferroelectricity and magnetic orderings has drawn considerable attentions due to the promising applications to these days technology. The microscopic origins of magnetism and ferroelectricity differ fundamentally, while the real mechanism of ferroelectricity is still under debate. In the present work, we have started from a simple Heisenberg hamiltonian and an interaction term resulting from electric field coupling with the magnetic spins with anisotropic energy, and have demonstrated that magnetization can be manipulated with electric field. In the multiferroic thin film system the magnetic field tends to play a role in stabilizing the spins in preferred orientations and induces a coupling of magnetism and ferroelectricity that opens a route to switch magnetization with electric polarazation.

Item Type:	Thesis (Masters)
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Divisions:	Africana
Depositing User:	Selom Ghislain
Date Deposited:	20 Sep 2018 13:42
Last Modified:	20 Sep 2018 13:42
URI:	http://thesisbank.jhia.ac.ke/id/eprint/5311

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