Physics – Condensed Matter – Superconductivity
Scientific paper
2008-07-19
Appl. Phys. Lett. 93, 102502 (2008)
Physics
Condensed Matter
Superconductivity
ps file with figures
Scientific paper
10.1063/1.2979687
We report point contact Andreev reflection (PCAR) spectroscopy studies on Ni3Al with composition range (24, 26 and 27 at. % of Al in the solid solution) spanning the ferromagnetic to paramagnetic phase boundary. PCAR studies performed using Nb tip as counter electrode reveal that the superconducting quasiparticle lifetime (\tao) and superconducting energy gap (\delta) decreases with increasing spin fluctuation in the normal metal electrode. Our study reveals that PCAR could be a useful probe to study spin fluctuations in systems which are on the verge of a magnetic instability.
Dhar Sudesh Kumar
Mukhopadhyay Sourin
Raychaudhuri Pratap
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