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Five Layered FCC Ferromagnetic Films as Described by Modified Second Order Perturbed Heisenberg Hamiltonian

Authors:

P. Samarasekara ,

University of Peradeniya, LK
About P.
Professor in Physics, Department of Physics
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B. I. Warnakulasooriya

University of Peradeniya, LK
About B. I.
B. Sc (Special, Hons) in Physics, Department of Physics
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Abstract

For the first time, the 2nd order perturbed Heisenberg Hamiltonian with all the seven magnetic energy parameters was solved for fcc structured ferromagnetic films with five layers. Previously, the 2nd order perturbed Heisenberg Hamiltonian was solved for four layered ferromagnetic films under some special assumptions by us. However, the exact solution of 2nd order perturbed Heisenberg Hamiltonian without any special assumption is formulated in this manuscript. The magnetic easy and hard directions were determined using the angles corresponding to the energy minimum and maximum in the 3-D and 2-D plots. The shape of the 3-D plots doesn’t change with the number of layers except the position of spikes. However, the magnetic easy direction varies with the number of layers. Most of the theoretical data obtained by our model agree with the experimental data of ferromagnetic thin films.
DOI: http://doi.org/10.4038/josuk.v11i1.7997
How to Cite: Samarasekara, P. & Warnakulasooriya, B.I., (2016). Five Layered FCC Ferromagnetic Films as Described by Modified Second Order Perturbed Heisenberg Hamiltonian. Journal of Science of the University of Kelaniya Sri Lanka. 11(1), pp.11–21. DOI: http://doi.org/10.4038/josuk.v11i1.7997
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Published on 13 Nov 2016.
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