Determination of the Spin Polarization of Half-Metallic CrO2 by Point Contact Andreev Reflection

Y. Ji; G. J. Strijkers; F. Y. Yang; C. L. Chien; J. M. Byers; A. Anguelouch; Gang Xiao; A. Gupta

doi:10.1103/PhysRevLett.86.5585

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Determination of the Spin Polarization of Half-Metallic CrO2 by Point Contact Andreev Reflection

Y. Ji, G. J. Strijkers, F. Y. Yang, C. L. Chien, J. M. Byers, A. Anguelouch, Gang Xiao, A. Gupta

DOI 10.1103/PhysRevLett.86.5585 · Physical Review Letters

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Abstract

Andreev reflection at a Pb/CrO2 point contact has been used to determine the spin polarization of single-crystal CrO2 films made by chemical vapor deposition. The spin polarization is found to be 0.96±0.01, which confirms that CrO2 is a half-metallic ferromagnet, as theoretically predicted.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown