61st Magnetic Materials Center Seminar
November 9, 2007, 9:00-
8th floor seminar room, Sengen
Structural and Magnetic Properties of Co2MnGa0.5Si0.5 and Co2MnGa0.5Sn0.5
B. Varaprasad
One of the key properties in magneto electronics is the so called half metallicity that is conduction electrons that are100% spin polarized. This is due to a gap at the Fermi level in the minority spin channel and a finite density of states for the majority spin channel. So Heusler alloys are one of the potential candidates for the magneto electronics. For Heusler alloys the temperature dependence is one of the major problems. To reduce the temperature dependence it is important to have the huge band gap at minority spin and the Fermi level should lay at the middle of the gap. I would like present my resent data on Co2MnGa0.5Si0.5 and Co2MnGa0.5Sn0.5 ¬which may have the less temperature dependence.

Towards CPPGMR with high MR ratio using Heusler alloys
T. Furubayashi
CPPGMR is promising for reading heads for high density media because of lower resistance than TMR. However, low MR ratio compared toTMR is still a disadvantage. In this talk, I would briefly describe the principle of CPPGMR and discuss problems to be solved for realizing high GMR ratio using Heusler alloys.


Y. Chen