Nanomagnet Logic from Partially Irradiated Co/Pt Nanomagnets

Author

Ju, Xueming ; Wartenburg, Stephanie ; Rezgani, Jamila ; Becherer, Markus ; Kiermaier, Josef ; Breitkreutz, Stephan ; Schmitt-Landsiedel, Doris ; Porod, Wolfgang ; Lugli, Paolo ; Csaba, Gyorgy

Author_Institution

Inst. for Nanoelectron., Tech. Univ. of Munich, Munich, Germany

Volume

11

Issue

1

fYear

2012

Firstpage

97

Lastpage

104

Abstract

This paper presents a computational study of logic devices built from single-domain Co/Pt nanomagnets, where magnetic properties of the dots are engineered by an inhomogenous focused ion beam (FIB) irradiation. We develop a micromagnetic model for such Co/Pt dots and show that their reversal behavior and coupling to neighboring dots can be precisely engineered by the dose and spatial distribution of the irradiation. We demonstrate that magnetic logic circuits and nonvolatile memory devices with attractive performance figures can be built from asymmetrically irradiated dots.

Keywords

cobalt alloys; coupled circuits; focused ion beam technology; logic circuits; magnetic circuits; magnetic hysteresis; micromagnetics; nanomagnetics; nanostructured materials; platinum alloys; radiation effects; random-access storage; CoPt; FIB irradiation; asymmetrically irradiated dots; inhomogenous focused ion beam irradiation; irradiation dose; magnetic coupling; magnetic logic circuits; magnetic reversal; micromagnetic model; nanomagnet logic devices; nonvolatile memory devices; partially irradiated structures; single-domain nanomagnets; spatial distribution; Anisotropic magnetoresistance; Couplings; Logic gates; Magnetic hysteresis; Magnetic multilayers; Radiation effects; Switches; Ferromagnetic logic; MQCA; field-coupling; nanomagnet logic; nonvolatile memories;

fLanguage

English

Journal_Title

Nanotechnology, IEEE Transactions on

Publisher

ieee

ISSN

1536-125X

Type

jour

DOI

10.1109/TNANO.2011.2157974

Filename

5875887