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APS » Journals » Phys. Rev. B » Volume 63 » Issue 9
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Phys. Rev. B 63, 092403 (2001) [4 pages]

Critical behavior of epitaxial half-metallic ferromagnetic CrO2 films

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F. Y. Yang and C. L. Chien
Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, Maryland 21218

X. W. Li and Gang Xiao
Department of Physics, Brown University, Providence, Rhode Island 02912

A. Gupta
IBM T. J. Watson Research Center, Yorktown Heights, New York 10598

Received 7 September 2000; published 7 February 2001

Critical behavior of the epitaxial CrO2 film, a half metallic ferromagnet, has been determined by magnetometry with the magnetic field along the uniaxial anisotropy axis. The critical temperature has been determined to be TC=386.50±0.05K. The critical exponents of β=0.371±0.005 and γ=1.43±0.01 indicate that CrO2 is a Heisenberg ferromagnet.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.63.092403
DOI:
10.1103/PhysRevB.63.092403
PACS:
75.30.-m, 75.70.-i, 75.40.-s, 68.55.-a
 
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