Characterization of Fe/W spin-polarized tips by means of holographic TEM and spin-polarized-STS of optically pumped p-GaAs

Author

Matsuda, T. ; Tonomura, A. ; Yamada, T.K. ; Okuyama, D. ; Mizuno, N. ; De Parga, A. L Vazquez ; van Kempen, H. ; Mizoguchi, T.

Author_Institution

Adv. Res. Lab., Hitachi Ltd., Saitama, Japan

fYear

2005

fDate

4-8 April 2005

Firstpage

193

Lastpage

194

Abstract

The nano-scale local magnetization at the apex of Fe-coated W tips is investigated by observing directly the magnetic flux from the tip using electron-holographic interference microscopy. The spin polarization of the Fe/W tip is also estimated by means of spin-polarized-STS of p-GaAs irradiated with circularly polarized light.

Keywords

III-V semiconductors; electron holography; gallium arsenide; holographic interferometry; iron; magnetic flux; magnetic switching; magnetisation; scanning tunnelling spectroscopy; surface magnetism; transmission electron microscopy; tungsten; Fe-W; GaAs; circularly polarized light; electron-holographic interference microscopy; holographic TEM; magnetic flux; nanoscale local magnetization; optically pumped p-GaAs; spin polarization; spin-polarized tips; spin-polarized-STS; Electron microscopy; Holographic optical components; Holography; Interference; Iron; Magnetic flux; Magnetic force microscopy; Magnetization; Optical polarization; Optical pumping;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International

Print_ISBN

0-7803-9009-1

Type

conf

DOI

10.1109/INTMAG.2005.1463525

Filename

1463525