Interface driven magnetoelectric effects in granular CrO2

  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},
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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