1. Center for Materials for Information Technology (MINT), The University of Alabama, Tuscaloosa, Alabama 35487, USA
2. Materials Development Center, TDK Corporation, Narita, Chiba 286-8588, Japan
3. Department of Physics and Astronomy, The University of Alabama, Tuscaloosa, Alabama 35487, USA
4. Department of Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, USA
5. Department of Electrical and Computer Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, USA