Research Abstracts Online
January 2009 - March 2010
University of Minnesota Twin Cities
Institute of Technology
Department of Electrical and Computer Engineering
PI: JianPing Wang
Magnetism in Iron Nitride Systems
Iron nitrides have been widely investigated for decades due to their extremely high saturation magnetization. This research group has carried out many experiments on the fabrication and measurement of iron nitrides that have yielded fruitful progress. To quantitatively prove their proposed model and to get a better understanding of this material, they are using the MD software package VAMP/VASP to calculate its energy band and density of states, then calculate its Ms and other magnetic properties.
The group has also investigated the material Mn3AN, which has a magnetism transition from paramagnetism to antiferromagnetism or ferromagnetism by changing the temperature. The transition is resulted from the change of crystal structure caused by temperature variation. The researchers used VASP to find the potential relationship between crystal structure and the magnetic properties, and the electronic properties such as resistivity and spin polarization.
Shihai He, Graduate Student
Nian Ji, Graduate Student
Xiaoqi Liu, Graduate Student