Zero field muon spin lattice relaxation rate in a Heisenberg ferromagnet at low temperature
P. Dalmas de Reotier, A. Yaouanc, (Commissariat a l'Energie, Atomique, Grenoble, France)
TL;DR
This paper develops a theoretical method to calculate the muon spin relaxation rate in a Heisenberg ferromagnet at low temperatures, linking magnetic fluctuations to material properties like magnon stiffness.
Contribution
It introduces a new theoretical framework using linear spin wave approximation to compute the zero field muon spin relaxation rate in ferromagnets.
Findings
Provides a way to estimate magnon stiffness from relaxation rate
Links magnetic fluctuations to relaxation measurements
Offers a theoretical tool for low-temperature ferromagnetic analysis
Abstract
We provide a theoretical framework to compute the zero field muon spin relaxation rate of a Heisenberg ferromagnet at low temperature. We use the linear spin wave approximation. The rate, which is a measure of the spin lattice relaxation induced by the magnetic fluctuations along the easy axis, allows one to estimate the magnon stiffness constant.
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