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Dynamic critical curve of a synthetic antiferromagnet

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Huy Pham, Dorin Cimpoesu, Andrei-Valentin Plamadã, Alexandru Stancu, and Leonard Spinu

Editorial: Applied Physics Letters, 95, p.222513 , 2009.


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.

Cuvinte cheie: synthetic antiferromagnet, dynamic critical curve