Ferromagnetic Resonance in Nickel Ferrite as a Function of Temperature

Abstract

Ferromagnetic resonance in NiO${\mathrm{Fe}}_{2}$${\mathrm{O}}_{3}$ has been studied over a temperature range of - 195\ifmmode^\circ\else\textdegree\fi{}C to 588\ifmmode^\circ\else\textdegree\fi{}C. From this study the variation in line width with temperature, $g$ value, and magnetic anisotropy constants ${K}_{1}$ and ${K}_{2}$ have been determined. Results show that the line width decreases with increasing temperature, the $g$ value remains essentially constant, and the two anisotropy constants show different sign behavior over the temperature range.