Study Of Photoinduced Ferromagnetism

Language: English

Published by LAP LAMBERT Academic Publishing Feb 2013, 2013

3847335839 / 9783847335832

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This item is printed on demand - Print on Demand Titel. Neuware -Effects of photo-excitation and spin wave scattering on magnetism of the diluted magnetic semiconductor (DMS) (Ga,Mn)As is theoretically studied. The exchange coupling energy between Mn+2 spins local moments is computed starting with the zeeman energy. Its equivalence with the Rudermann-Kittel-Kasuya-Yosida (RKKY) exchange energy which is known to have an oscillatory characteristics and contributing to an indirect exchange, expressed based on the Zener model is described. This energy is shown to rise to maximum near/at resonance. Green function formalism is used to find expression for ferromagnetic transition temperature TC, magnetization and magnetic specific heat Cmag starting with a model Hamiltonian consisting of magnons, photons and an interaction of magnons with photons. TC is indicated for zero impurity concentration, x = 0. Unusual upturn in magnetization and negative magnon specific heat are observed at very low temperature values for larger magnon-photon coupling constant, in which an increase in this coupling is found to decrease Cmag, and enhance the magnetization and the ferromagnetic ordering.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 144 pp. Englisch.…

Seller Inventory # 9783847335832

Title
Study Of Photoinduced Ferromagnetism
Author
Chernet Amente Geffe
Publisher
LAP LAMBERT Academic Publishing Feb 2013
Publication year
2013
Condition
Neu
Binding
Taschenbuch
Language
English
ISBN 10
3847335839
ISBN 13
9783847335832
Item weight
233 grams
Dimensions
220x150x10 mm

buchversandmimpf2000

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