Activation energy and switching behavior of two interacting identical magnetic particles

Plamadă, Andrei-Valentin; Cimpoesu, Dorin; Stancu, Alexandru
March 2010
Applied Physics Letters;3/22/2010, Vol. 96 Issue 12, p122505
Academic Journal
An analytical method to study the magnetization behavior of a system composed of two magnetic particles is presented, when the magnetic field is applied in-plane. The study is based on a single-domain model, assuming that the particles are two ellipsoids with both exchange and magnetostatic coupling. The model is used to study the synthetic antiferromagnetic structure and a pair of particles with only dipolar interaction for bond angles β=0 and π/2. When the magnetic field is applied along the easy axis a complete description for the system’s minima, activation energy, and possible switches is performed.


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