Formation of ferromagnetic submicron particles of MnAs and MnGa on GaAs substrates by ion implantation

Author

Ando, K. ; Chiba, A. ; Tanoue, H. ; Kirino, F. ; Tanaka, M.

Author_Institution

Electrotech. Lab., Tsukuba, Japan

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

3463

Lastpage

3465

Abstract

Submicron room-temperature ferromagnets of MnAs and MnGa have been fabricated on GaAs semiconductor substrates by Mn⁺ ion implantation and subsequent heat treatment at 900°C under a controlled atmosphere. MnAs and MnGa particles are formed under nitrogen gas and forming (90%N₂,10%H₂) gas atmospheres, respectively. Their structural, magneto-optical and magnetic properties are characterized by superconducting quantum interference device magnetometry, magnetic circular dichroism spectroscopy, transmission electron microscopy, and atomic and magnetic force microscopies. The MnAs precipitates grow epitaxially on GaAs substrates and show an in-plane uniaxial magnetic anisotropy

Keywords

atomic force microscopy; ferromagnetic materials; heat treatment; ion implantation; magnetic force microscopy; magnetic particles; magnetic thin films; manganese compounds; transmission electron microscopy; 900 C; GaAs; GaAs substrates; MnAs; MnGa; atomic force microscopies; ferromagnetic submicron particles; in-plane uniaxial magnetic anisotropy; ion implantation; magnetic circular dichroism; magnetic force microscopy; magnetic properties; magneto-optical properties; structural properties; superconducting quantum interference device magnetometry; transmission electron microscopy; Atmosphere; Atomic force microscopy; Gallium arsenide; Magnetic anisotropy; Magnetic devices; Magnetic force microscopy; Perpendicular magnetic anisotropy; Substrates; Superconducting magnets; Transmission electron microscopy;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800558

Filename

800558