Energy barriers for bit-encoding states based on 360° domain walls in ultrathin ferromagnetic nanorings

Document Type

Article

Publication Date

5-7-2015

Abstract

A numerical thermal stability study of the bit-encoding states in a proposed multi-level magnetic storage element based on an ultrathin ferromagnetic nanoring is presented. The material parameters and the ring dimensions for which there are five distinct metastable magnetization configurations separated by energy barriers exceeding 50kBT at room temperature are identified. The results are obtained, using the string method for the study of rare events to locate the transition states separating the metastable states and to identify the most likely thermally activated pathways.

Identifier

84924901854 (Scopus)

Publication Title

Journal of Applied Physics

External Full Text Location

https://doi.org/10.1063/1.4914341

e-ISSN

10897550

ISSN

00218979

Issue

17

Volume

117

Grant

DMS-0908279

Fund Ref

National Science Foundation

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