| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2016: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2014: ¥11,570,000 (Direct Cost: ¥8,900,000、Indirect Cost: ¥2,670,000)
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| Outline of Final Research Achievements |
We have investigated the 112-type CaFeAs2 and experimentally demonstrated: (1) superconducting transition temperature is increased up to 47 K by the La and Sb simultaneous doping, (2) the doped Sb does not substitute for As at superconducting FeAs layers, but for As at interlayer substances, and (3) antiferromangetic ordering appears by heavy La doping of CaFeAs2. We also have investigated the 10-4-8-type Ca10(Ir4As8)(Fe2As2)5 and demonstrated: (4) the compound experiences a structural phase transition (SPT) at approximately 100 K, (5) the SPT is suppressed under a hydrostatic pressure of 0.5 GPa, which is associated with disappearance of superconductivity, and (6) Ir 5d orbitals contribute to charge transport.
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