184th Special MMU Seminar


High Magnetic Anisotropy Materials

Prof. Takao Suzuki
Director for Center for Materials for Information Technology
University of Alabama
Tuscaloosa, AL, USA
Date: Monday, May 27, 2013
Time: 10:30 - 11:30
Place: 7th floor small seminar room, Sengen

The magnitude of magnetic anisotropy energy varies over a range of 10-3 to 102 ¦ÌeV/atom, much smaller than atomic binding energy ( a few eV/atom) and exchange energy (10~103 meV/atom). Nevertheless, it plays a key role in governing magnetic materials¡Ç characteristics, and devices thus fabricated. There have been recently some interesting developments for high magnetic anisotropy materials including L10 -FeNi thin films, ¦Á¡É-Fe16N2 nano-particles,Co3C nanoparticles and bct-FeCo. Such high magnetic anisotropy materials are of great interest for device applications such as permanent magnets, spintronics, and memory storage. The talk reviews first the high magnetic anisotropy materials, including m-DO19Fe3Pt thin films which exhibits 107 erg/cc at room temperature, and then presents some recent results of MnBi thin films, a potential candidate for MEMS application.