Mössbauer Spectra of Noninteracting Single-Domain Ferromagnetic Particles Including Superparamagnetic Relaxation: Simplification of the Multilevel Method
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- Déjardin, P.M. & Coffey, W.T. Hyperfine Interact (2005) 163: 73. doi:10.1007/s10751-004-5451-x
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A simple method of calculation of Mössbauer relaxation spectra of single-domain ferromagnetic particle assemblies is developed from Brown's model of coherent rotation of the magnetization utilizing matrix continued fractions to compute the lineshape. The method allows one to obtain a simple analytical formula for the lineshape in the strong relaxation limit, which provides results in agreement with numerical calculations and radically simplifies analysis of the spectra.