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Abstract
In this work, we studied from a theoretical approach, the effect of temperature on the frequency of ferromagnetic resonance of an anisotropic magnetic particle; we analyzed the materials FePt, Co, and Ni. Using the Landau-Lifshitz-Bloch (LLB) equation of motion, we calculated the magnetic susceptibility tensor, which provides information on the absorption power and ferromagnetic resonance of the system. We found that the resonance frequency underwent a shift toward the lower frequency values as the temperature of the material increased. In materials with high anisotropy, the resonance is presented to lower fields. Furthermore, we observed in all materials a decrease in energy absorption as the temperature increased. We concluded that the temperature and the crystalline anisotropy have a strong influence on field values and resonance frequency, as well as on energy absorption.
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