| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
Mn-Co-Ga alloys have been studied for exploring of new materials having both half-metallic and semi-metallic properties. Single phase Mn-Co-Ga epitaxial films with cubic structure have been successfully grown on MgO single crystalline substrate. The films showed large electrical resistivity and metallic temperature dependence of resistivity. The Hall coefficient for the films changed the sign depending on Co concentration while their absolute values were not large, as expected in semimetal. On the other hand, magnetic tunnel junctions with Mn-Co-Ga electrode showed the enhanced magnetoresistance at low temperature and the junction resistance larger by a factor of ten than that of the junction with Co non-doped Mn-Ga. These results indicated that Mn-Co-Ga had unique electronic states.
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