Magnetization reversal using excitation of collective modes in nanodot matrices

Mehrdad Elyasi, Charanjit S. Bhatia, Hyunsoo Yang

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The large arrays of magnetic dots are the building blocks of magnonic crystals and the emerging bit patterned media for future recording technology. In order to fully utilize the functionalities of high density magnetic nanodots, a method for the selective reversal of a single nanodot in a matrix of dots is desired. We have proposed a method for magnetization reversal of a single nanodot with microwave excitation in a matrix of magneto-statically interacting dots. The method is based on the excitation of collective modes and the spatial anomaly in the microwave power absorption. We perform numerical simulations to demonstrate the possibility of switching a single dot from any initial state of a 3 by 3 matrix of dots, and develop a theoretical model for the phenomena. We discuss the applicability of the proposed method for introducing defect modes in magnonic crystals as well as for future magnetic recording.

Original languageEnglish
Article number7908
JournalScientific reports
Volume5
DOIs
Publication statusPublished - 2015 Jan 20
Externally publishedYes

ASJC Scopus subject areas

  • General

Fingerprint Dive into the research topics of 'Magnetization reversal using excitation of collective modes in nanodot matrices'. Together they form a unique fingerprint.

Cite this