Enhanced switching current density due to resonant precession in current-induced magnetization switching

Micromagnetic investigation was performed on the influence of neighboring cells in a conventional rectangular array to the switching current density (Jc) in the current-induced magnetization switching. We found that the Jc was increased regardless of the relative switching direction to the overall s...

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Veröffentlicht in:Applied physics letters 2007-05, Vol.90 (21)
Hauptverfasser: Kim, Woojin, Lee, Taek-Dong, Lee, Jang-Eun, Oh, Se-Chung, Shin, Kyung-Ho, Suh, Hong-Ju, Lee, Kyung-Jin
Format: Artikel
Sprache:eng
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Zusammenfassung:Micromagnetic investigation was performed on the influence of neighboring cells in a conventional rectangular array to the switching current density (Jc) in the current-induced magnetization switching. We found that the Jc was increased regardless of the relative switching direction to the overall stray field. It is because the precession of the magnetization in the switching cell induces a resonant precession in neighboring cells through magnetostatic interaction. The resonant precession disturbs a fast reversal and results in the enhanced Jc for a fixed pulse width. The enhancement increases as the distance between the cells decreases. Here we proposed a zigzag array which significantly suppresses the enhancement of Jc due to the resonant precession.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2742282