Magnetostatics of synthetic ferrimagnet elements
Olivier Fruchart (NEEL), Bernard Dieny (SPINTEC)
TL;DR
This paper derives exact and approximate formulas for the magnetostatic energy of synthetic ferrimagnet elements, enabling easier evaluation of their magnetic properties like energy barriers and anisotropy fields.
Contribution
It provides new analytical formulas for magnetostatic energy in synthetic ferrimagnets, facilitating the analysis of their magnetic stability and switching behavior.
Findings
Exact formulas for magnetostatic energy derived
Approximate formulas offer high accuracy and simplicity
Formulas enable evaluation of coercivity and thermal stability
Abstract
We calculate the magnetostatic energy of synthetic ferrimagnet (SyF) elements, consisting of two thin ferromagnetic layers coupled antiferromagnetically through RKKY coupling. We calculate exact formulas as well as approximate yet accurate ones, which can be used to easily derive energy barriers and anisotropy fields of SyF. These can be used to evaluate coercivity, thermal stability and other useful quantities.
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