Influence of Barrier Width on Spin-Polarisation Measured by Point Contact Andreev Reflection
نویسندگان
چکیده
منابع مشابه
Transport spin polarisation in SrRuO3 measured through Point Contact Andreev reflection
We report a study in which Andreev reflection using a Nb point contact is used to measure the transport spin polarisation of the 4d itinerant ferromagnet SrRuO3. By performing the study in high quality thin films with residual resistivities less than 7μΩ-cm, we ensure that the study is done in the ballistic limit, a regime which is difficult to reach in oxide ferromagnets. The degree of transpo...
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متن کاملDetermination of the spin polarization of half-metallic CrO(2) by point contact Andreev reflection.
Andreev reflection at a Pb/CrO(2) point contact has been used to determine the spin polarization of single-crystal CrO(2) films made by chemical vapor deposition. The spin polarization is found to be 0.96 +/- 0.01, which confirms that CrO(2) is a half-metallic ferromagnet, as theoretically predicted.
متن کاملAnalysis of point-contact Andreev reflection spectra in spin polarization measurements
G. T. Woods,1,4 R. J. Soulen, Jr.,1 I. Mazin,1 B. Nadgorny,2 M. S. Osofsky,1 J. Sanders,3 H. Srikanth,3 W. F. Egelhoff,4 and R. Datla4 1Naval Research Laboratory, Washington, DC 20375, USA 2Department of Physics and Astronomy, Wayne State University, Detroit, Michigan 48201, USA 3Department of Physics, University of South Florida, Tampa, Florida 33620, USA 4National Institute of Standards and T...
متن کاملAndreev reflection measurements of spin polarization
We discuss aspects of Andreev reflection AR measurements in normal metal-superconductor N-S and ferromagnet-superconductor F-S devices. We describe the analytical model used to quantify spin polarization from the conductance measurements and discuss the validity of this simple model using parabolic bands as simple surrogates for real band structures. We present AR measurements of spin polarizat...
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ژورنال
عنوان ژورنال: Journal of Superconductivity and Novel Magnetism
سال: 2010
ISSN: 1557-1939,1557-1947
DOI: 10.1007/s10948-010-0888-4