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Effect of the Spin-Spin Interaction on the Coulomb’s Law: Application to Ferromagnetism

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Author(s): Voicu Dolocan | Voicu Octavian Dolocan

Journal: World Journal of Condensed Matter Physics
ISSN 2160-6919

Volume: 02;
Issue: 03;
Start page: 117;
Date: 2012;
Original page

Keywords: Spin-Spin Interaction | Magnetic Moment | Ferromagnetism

ABSTRACT
In this work we present a model for the determination of the interaction energy for triplet and singlet states in atoms with incomplete filled shells. Our model includes the modification of the Coulomb’s law by the interaction between the magnetic moments of the electrons. We find that the energy of the triplet state is lower than the energy of the singlet state. We calculate the interaction energy between the electrons from the adjacent atoms in fcc lattices and we find that the minimum interaction energy is attained for the triplet state. The result is presented for the interaction between the electrons of the first coordination group and those of the second coordination group. The interaction energy which aligns the spins is used to evaluate the Curie temperature in a mean field model.
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