The Properties and Structure Relationship of Half Metallic Magnetic Materials on GaAs

Author

Hassan, Sameh S A ; Xu, Yongbing ; Wu, Jing ; Zheng, Jian-Guo ; Huang, Jianyu Y. ; Huang, Yizhong ; Damsgaard, Christian D. ; Hansen, Jørn B. ; Jacobsen, Claus S.

Author_Institution

Depts. of Electron., Univ. of York, York, UK

Volume

45

Issue

10

fYear

2009

Firstpage

4360

Lastpage

4363

Abstract

We report the magnetic and transport properties of two promising half metallic/GaAs hybrid spintronic structures with respect to their structural features. The Co₂ MnGa/GaAs(100) has shown a very low magnetic moment which is attributed to the columnar structure and the interface amorphous layer as from the HRTEM images. The out of plane hysteresis loops have shown a double switching which is related to the interface layer with different magnetic properties. In the Fe₃O₄/GaAs(100) system, the fast saturation of the magnetization indicates the low antiphase boundaries, which is supported by the HRTEM image. Furthermore, the moderate barrier height and the heavily damped processional response to the applied field pulses may be related to the interface structure.

Keywords

cobalt alloys; gallium alloys; gallium arsenide; interface magnetism; magnetic hysteresis; magnetic moments; manganese alloys; transmission electron microscopy; Co₂MnGa-GaAs; half metallic magnetic materials; hybrid spintronic structures; magnetic moment; magnetization; out of plane hysteresis loops; transport properties; Gallium arsenide (GaAs); Heusler alloys; magnetic oxides; magnetite; molecular-beam epitaxy; spintronics; ultra-thin films;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2009.2024768

Filename

5257364