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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/34136
Record Status
Checked
Record Id
34136
Title
Structural, magnetic, electronic, and spin transport properties of epitaxial Fe
3
Si/GaAs(001)
Contributors
A Ionescu (Cambridge U.)
,
CAF Vaz (Cambridge U.)
,
T Trypiniotis (Cambridge U.)
,
H Garcia-Miquel (Cambridge U.)
,
JAC Bland (Cambridge U.)
,
ME Vickers (Cambridge U.)
,
RM Dalgliesh (CCLRC Rutherford Appleton Lab.)
,
S Langridge (CCLRC Rutherford Appleton Lab.)
,
Y Bugoslavsky (Imperial College)
,
Y Miyoshi (Imperial College)
,
LF Cohen (Imperial College)
,
KRA Ziebeck (Loughborough U.)
Abstract
We report experimental results on the structural, magnetic, electronic, and spin transport properties of a 21 nm Fe<sub>3</sub>Si/GaAs(001) heterostructure epitaxially grown by coevaporation. High-resolution x-ray diffraction shows an almost stoichiometric film, which is lattice matched in-plane to the GaAs substrate and therefore slightly tetragonal distorted. Polarized neutron reflectometry measurements yield a magnetic moment of (1.107±0.014)μ<sub>B</sub> per atom at room temperature (RT), while superconducting quantum interference device magnetometry yields a magnetic moment of (0.9±0.1)μ<sub>B</sub> per atom at RT, both close to the bulk value. Magneto-optic Kerr effect measurements show that this system has in-plane cubic anisotropy with easy axes along the ⟨100⟩ directions and a cubic anisotropy constant K<sub>1</sub>=(3.1±0.6)x10<sup>4</sup> erg/cm<sup>3</sup> at RT. A resistivity of (4.1±0.4)x10<sup-7</sup> Ω m in the Fe<sub>3</sub>Si film was measured, which is close to the bulk value. Optical spin orientation in the GaAs was used for spin transport measurements and spin detection is demonstrated at RT for this system. Point contact Andreev reflection spectroscopy was used to determine the spin polarization of the transport current, yielding P=(45±5)%.
Organisation
CCLRC
,
ISIS
,
ISIS-CRISP
Keywords
Physics
,
spin transport
,
Fe3Si
,
ISIS 2005
Funding Information
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
Phys Rev B
71 (2005): 094401.
doi:10.1103/PhysRevB.71.094401
2005
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