Title :
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
fDate :
6/1/2010 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2010.2041194
