Dynamic critical curve of a synthetic antiferromagnet

Pham, Huy; Cimpoesu, Dorin; Plamadă, Andrei-Valentin; Stancu, Alexandru; Spinu, Leonard
November 2009
Applied Physics Letters;11/30/2009, Vol. 95 Issue 22, p222513
Academic Journal
In this letter, a dynamic generalization of static critical curves (sCCs) for synthetic antiferromagnet (SAF) structures is presented, analyzing the magnetization switching of SAF elements subjected to pulsed magnetic fields. The dependence of dynamic critical curves (dCCs) on field pulse’s shape and length, on damping, and on magnetostatic coupling is investigated. Comparing sCCs, which are currently used for studying the switching in toggle magnetic random access memories, with dCCs, it is shown that a consistent switching can be achieved only under specific conditions that take into account the dynamics of the systems. The study relies on the Landau–Lifshitz–Gilbert equation.


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