Spin waves in a simple ferromagnetic cubic lattice using the Heisenberg model with nearest and next-nearest neighbor interactions

Authors

  • Carlos F. Baldo National Institute of Physics, University of the Philippines Diliman
  • Cristine Villagonzalo National Institute of Physics, University of the Philippines Diliman

Abstract

We study the combined effect of the nearest and the next-nearest neighbor interactions on the spin wave dispersion of an isotropic cubic ferromagnet in a uniform magnetic field using the Heisenberg model. Near the ground state, the components of the spin angular momentum perpendicular to the applied field are negligible as compared to the parallel spin component. Hence, the dispersion relation and the ground state energy estimate of the system are obtained by considering the spin uctuations along the plane normal to the magnetic field. The results herein are compared to the case where only the effect of the nearest neighbors are present.

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Article ID

SPP-2010-1B-02

Section

Theoretical Physics

Published

2010-10-25

How to Cite

[1]
CF Baldo and C Villagonzalo, Spin waves in a simple ferromagnetic cubic lattice using the Heisenberg model with nearest and next-nearest neighbor interactions, Proceedings of the Samahang Pisika ng Pilipinas 28, SPP-2010-1B-02 (2010). URL: https://proceedings.spp-online.org/article/view/SPP-2010-1B-02.