| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Outline of Final Research Achievements |
FeSr2YCu2O6+δ is magnetic superconductor which exhibits superconductivity at 60 K and antiferromagnetism of Fe at 20 K. The properties are different from those of parent material Ba2YCu3O6+δ. In Fe1-xSr2YCu2+xO6+δ, the compounds above x = 0.4 do not exhibit antiferromagentism, and the Tc value has the minimum value at x = 0.3. In lanthanoid(Ln)-substituted FeSr2LnCu2O6+δ, the Tc value has the maximum value at Ln = Y, and the Tc value decreases with increasing the difference of the ionic radius between Y and Ln except for Tb. The Tc value of FeSr2TbCu2O6+δ, which exhibits 2-dimensional magnetic order of Tb, falls to 28 K. Since the intragrain critical current density is extremely low (1.7 A/cm2 at 2 K), magnetism of Fe and Ln affects the vortex state. Consequently, the superconducting properties are different from those of Ba2YCu3O6+δ.
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