Interface driven magnetoelectric effects in granular CrO2

@article{Bajpai2010InterfaceDM,
  title={Interface driven magnetoelectric effects in granular CrO2},
  author={Ashna Bajpai and Pavel Borisov and S Gorantla and R{\"u}diger Klingeler and J. Thomas and Thomas Gemming and W Kleemann and Bernd Buchner},
  journal={arXiv: Strongly Correlated Electrons},
  year={2010}
}
Antiferromagnetic and magnetoelectric Cr2O3-surfaces strongly affect the electronic properties in half metallic CrO2. We show the presence of a Cr2O3 surface layer on CrO3 grains by high-resolution transmission electron microscopy. The effect of these surface layers is demonstrated by measurements of the temperature variation of the magnetoelectric susceptibility. A major observation is a sign change at about 100 K followed by a monotonic rise as a function of temperature. These electric field… 

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References

SHOWING 1-10 OF 10 REFERENCES
Probing magnetic anisotropy effects in epitaxial CrO 2 thin films
The magnetic anisotropy in ferromagnetic chromium dioxide thin films ${(T}_{c}\ensuremath{\sim}393\mathrm{K})$ grown epitaxially on (100) ${\mathrm{TiO}}_{2}$ substrates, is probed using precise rf
"J."
however (for it was the literal soul of the life of the Redeemer, John xv. io), is the peculiar token of fellowship with the Redeemer. That love to God (what is meant here is not God’s love to men)
APPL
Statistical packages have been used for decades to analyze large datasets or to perform mathematically intractable statistical methods. These packages are not capable of working with random variables
Phys
  • Rev. Lett., 7
  • 1961
Nat
  • Mater., 6
  • 2007
Phys
  • Rev. Lett., 88
  • 2001
H
  • Srikanth, A.Gupta, X.W. Li and Gang Xiao, Phy. Rev. B, 62
  • 2000
Ferroelectrics
  • 161
  • 1993
Phys
  • Lett., 11
  • 1964
Phys
  • Rev., 130
  • 1963