Enhanced magnetization of CuCr2O4 thin films by substrate-induced strain

Jodi M. Iwata, Rajesh V. Chopdekar, Franklin J. Wong, Brittany B. Nelson-Cheeseman, Elke Arenholz, Yuri Suzuki
2009 Journal of Applied Physics  
We report the synthesis of epitaxial spinel CuCr 2 O 4 thin films that display enhanced magnetization in excess of 200% of the bulk values when grown on single-crystal (110) MgAl 2 O 4 substrates. Bulk CuCr 2 O 4 is a ferrimagnetic insulator with a net magnetic moment of 0.5μ B due to its distorted tetragonal unit cell (c/a= 1.29) and frustrated triangular moment configuration. We show that through epitaxial growth and substrate-induced strain, it is possible to tune the magnetic functionality
more » ... etic functionality of our films by reducing the tetragonal distortion of the unit cell which effectively decreases the frustration of the magnetic moments allowing for an overall greater net moment.
doi:10.1063/1.3058612 fatcat:3vo3sck7szbkjlyddgdvtshzzi