Magnetic Sensor Devices Based on Ordered Planar Arrangements of MnAs Nanocluster

Author

Heiliger, Christian ; Czerner, Michael ; Klar, Peter J. ; Hara, Shinjiroh

Author_Institution

Phys. Inst., Justus Liebig Univ., Giessen, Germany

Volume

46

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

1702

Lastpage

1704

Abstract

We propose planar magneto-electronic devices based on accurately positioned and shaped ferromagnetic MnAs nanoclusters in NiAs structure. The prototype discussed consists of a small hexagon-shaped cluster sandwiched between two elongated clusters with fixed magnetic orientations. The magnetization of the center cluster is free and can be rotated by an external magnetic field. Our ab initio calculations yield a strong dependence of the conductance as a function of the direction of the external magnetic field which exhibits an in-plane symmetry of 360 degrees.

Keywords

KKR calculations; ab initio calculations; arsenic alloys; elongation; ferromagnetic materials; giant magnetoresistance; magnetic domains; magnetic sensors; magnetoelectronics; manganese alloys; metal clusters; nanosensors; nanotechnology; nickel alloys; sandwich structures; MnAs-NiAs; NiAs structure; ab initio calculations; center cluster magnetization; elongated clusters; external magnetic field rotation; ferromagnetic MnAs nanoclusters; fixed magnetic orientations; hexagon-shaped cluster; magnetic sensor devices; ordered planar arrangements; planar magneto-electronic devices; sandwich structure; Giant magnetoresistance; Magnetic devices; Magnetic domains; Magnetic fields; Magnetic sensors; Magnetization; Magnetoelectronics; Nanoscale devices; Shape control; Tunneling magnetoresistance; Magnetic device; magnetic domains; magnetoresistance; nanotechnology;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2010.2041194

Filename

5467433