A. Anguelouch et al., Near-complete spin polarization in atomically-smooth chromium-dioxide epitaxial films prepared using a CVD liquid precursor - art. no. 180408, PHYS REV B, 6418(18), 2001, pp. 0408
We have fabricated single crystal chromium dioxide (CrO2) films using chemi
cal vapor deposition with chromyl chloride (CrO2Cl2) as a liquid precursor.
Their electrical and magnetic proper-ties have been investigated. These fi
lms are atomically smooth with a rms roughness of less than 5 Angstrom for
1000 Angstrom thick films. We have obtained a spin polarization of P = 98.4
%, as determined by the technique of point-contact Andreev reflection. Magn
etization and resistivity measurements on these films are in good agreement
with those measured on films made with the CrO3 solid precursor, The proce
ss using the liquid precursor is superior to other existing techniques for
the preparation of single crystal single- and multilayers containing CrO2,
especially the structure of magnetic tunnel junctions.