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Phys. Rev. B 67, 020411(R) (2003) [4 pages]

Transport spin polarization in SrRuO3 measured through point-contact Andreev reflection

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P. Raychaudhuri1,2, A. P. Mackenzie1, J. W. Reiner3, and M. R. Beasley3
1Department of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, KY16 9SS, Scotland
2School of Physics and Astronomy, University of Birmingham, Edgbaston, B15 2TT, United Kingdom
3Edward L. Ginzton Laboratories, Stanford University, Stanford, California 94305

Received 2 August 2002; published 31 January 2003

We report a study in which Andreev reflection using a Nb point contact is used to measure the transport spin polarization of the 4d itinerant ferromagnet SrRuO3 in the ballistic limit of transport. The degree of transport spin polarization is comparable to that of the hole-doped rare-earth manganites. We conclude that the large transport spin polarization results mainly from a difference in the Fermi velocities between the majority- and minority-spin channels in this material.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.67.020411
DOI:
10.1103/PhysRevB.67.020411
PACS:
75.70.-i, 72.25.-b, 73.40.-c
 
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