| Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2022: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2021: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2020: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2019: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000)
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| Outline of Final Research Achievements |
The suppression rate of the superconducting transition temperature Tc of ultrathin Pb films due to magnetic adatom deposition was systematically studied for various magnetic material and coating material. All the experimental results are explained in terms of the following assumptions. (1) The suppression rate reaches its maximum when the Kondo temperature TK is about the same as Tc. (2) TK decreases rapidly as the spin of adatoms increases. (3) By inserting Au or Ag between the Pb film and the magnetic adatoms, the number of valence electrons of the host metal atoms is effectively reduced, and TK decreases significantly.
It was found that coating Pb films with Au or Ag increases the suppression rate. This seemingly surprising result can be explained in terms of (1) and (3).
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