Selective magnetization switching with microwave assistance for three-dimensional magnetic recording

Terumitsu Tanaka, Y. Otsuka, Y. Furomoto, Kimihide Matsuyama, Y. Nozaki

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The possibility of selective magnetization switching in a three-layered stacked magnetic pillar was discussed using micromagnetic simulation that considers three-dimensional magnetic recording. Selective magnetization switching is possible with the assistance of a circularly polarized microwave field with an adequate corresponding frequency. This study demonstrates that the value of the saturation magnetization of the magnetic layers is critical in suppressing selective magnetization switching errors caused by magnetostatic fields. A relatively large saturation magnetization of up to 600 emu/cm 3 in the second layer also allows successful selective magnetization switching, thus enabling three-dimensional magnetic recording. However, damping constants smaller than 0.1 for the magnetic layers are crucial in the model calculations because of the limited strength of the microwave fields applied to the stacked magnetic pillar. The leakage flux is also estimated considering a multi-bit reproducing process, where eight-digit signals are obtained depending on the magnetization states of the stacked magnetic pillar.

Original languageEnglish
Article number143908
JournalJournal of Applied Physics
Volume113
Issue number14
DOIs
Publication statusPublished - Apr 14 2013

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magnetic recording
microwaves
magnetization
magnetostatic fields
saturation
digits
leakage
damping
simulation

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Selective magnetization switching with microwave assistance for three-dimensional magnetic recording. / Tanaka, Terumitsu; Otsuka, Y.; Furomoto, Y.; Matsuyama, Kimihide; Nozaki, Y.

In: Journal of Applied Physics, Vol. 113, No. 14, 143908, 14.04.2013.

Research output: Contribution to journalArticle

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