Fabrication of highly spin-polarized Co2FeAl0.5Si0.5 thin-films

M. Vahidi; J. A. Gifford; S. K. Zhang; S. Krishnamurthy; Z. G. Yu; L. Yu; M. Huang; C. Youngbull; T. Y. Chen; N. Newman

doi:10.1063/1.4869798

APL Materials (Apr 2014)

Fabrication of highly spin-polarized Co2FeAl0.5Si0.5 thin-films

M. Vahidi,
J. A. Gifford,
S. K. Zhang,
S. Krishnamurthy,
Z. G. Yu,
L. Yu,
M. Huang,
C. Youngbull,
T. Y. Chen,
N. Newman

Affiliations

M. Vahidi: School of Materials, Arizona State University, Tempe, Arizona 85287-8706, USA
J. A. Gifford: Department of Physics, Arizona State University, Tempe, Arizona 85287, USA
S. K. Zhang: School of Materials, Arizona State University, Tempe, Arizona 85287-8706, USA
S. Krishnamurthy: SRI International, 301-64, Menlo Park, California 94025, USA
Z. G. Yu: SRI International, 301-64, Menlo Park, California 94025, USA
L. Yu: School of Materials, Arizona State University, Tempe, Arizona 85287-8706, USA
M. Huang: School of Materials, Arizona State University, Tempe, Arizona 85287-8706, USA
C. Youngbull: The Biodesign Institute, Arizona State University, Tempe, Arizona 85287, USA
T. Y. Chen: Department of Physics, Arizona State University, Tempe, Arizona 85287, USA
N. Newman: School of Materials, Arizona State University, Tempe, Arizona 85287-8706, USA

DOI: https://doi.org/10.1063/1.4869798
Journal volume & issue: Vol. 2, no. 4
pp. 046108 – 046108-7

Abstract

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Ferromagnetic Heusler Co2FeAl0.5Si0.5 epitaxial thin-films have been fabricated in the L21 structure with saturation magnetizations over 1200 emu/cm3. Andreev reflection measurements show that the spin polarization is as high as 80% in samples sputtered on unheated MgO (100) substrates and annealed at high temperatures. However, the spin polarization is considerably smaller in samples deposited on heated substrates.

Published in APL Materials

ISSN: 2166-532X (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Technology: Chemical technology: Biotechnology; Science: Physics
Website: http://aplmaterials.aip.org

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