| Budget Amount *help |
¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000)
Fiscal Year 2017: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2016: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2015: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2014: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
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| Outline of Final Research Achievements |
It is well known that external magnetic fields and magnetic moments of impurities both suppress superconductivity. However, their combined effect on superconductivity has not been elucidated yet. We have studied the superconducting transition in ultrathin Pb films with magnetic impurities grown on a cleaved GaAs(110) surface. It was demonstrated that the transition temperature can be enhanced by external magnetic fields applied parallel to the conducting plane. Furthermore, we found that a Pb-Ce alloy, where superconductivity is totally suppressed at zero-field, actually becomes superconducting in parallel magnetic fields. These phenomena were explained in terms of the suppression of the spin-exchange scattering rate, which can be controlled by the magnetic field.
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