TY - JOUR
T1 - Generation of large spin accumulation in S/N/S josephson junctions
AU - Wakamura, Taro
AU - Ohnishi, Kohei
AU - Niimi, Yasuhiro
AU - Otani, Yoshichika
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2012
Y1 - 2012
N2 - We have studied the generation of spin accumulation much larger than the conventional value in lateral spin valves. The accumulation can be used as an alternative means to apply the exchange field in the Josephson junction to induce exotic superconductive phenomena such as 0-π transition. In Cu/MgO/permalloy (Py) lateral spin valve devices, the MgO interface layer enhances the spin accumulation at 10 K by a factor of ten. The spin diffusion length of 1.3 μm at 10 K for Cu assures homogeneous spin polarization in the region of interest. Thereby we intend to inject the spin current with the large spin accumulation into superconductor(S)/normal metal(N)/superconductor Josephson junctions. As a primary attempt, we fabricated in-situ samples for spin injection into Josephson junction with Ohmic contact between Cu and Py. The clear suppression of the critical current of the Josephson junction is observed as the spin injection current increases.
AB - We have studied the generation of spin accumulation much larger than the conventional value in lateral spin valves. The accumulation can be used as an alternative means to apply the exchange field in the Josephson junction to induce exotic superconductive phenomena such as 0-π transition. In Cu/MgO/permalloy (Py) lateral spin valve devices, the MgO interface layer enhances the spin accumulation at 10 K by a factor of ten. The spin diffusion length of 1.3 μm at 10 K for Cu assures homogeneous spin polarization in the region of interest. Thereby we intend to inject the spin current with the large spin accumulation into superconductor(S)/normal metal(N)/superconductor Josephson junctions. As a primary attempt, we fabricated in-situ samples for spin injection into Josephson junction with Ohmic contact between Cu and Py. The clear suppression of the critical current of the Josephson junction is observed as the spin injection current increases.
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U2 - 10.1088/1742-6596/400/2/022130
DO - 10.1088/1742-6596/400/2/022130
M3 - Conference article
AN - SCOPUS:84873673866
VL - 400
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - PART 2
M1 - 022130
T2 - 26th International Conference on Low Temperature Physics, LT 2011
Y2 - 10 August 2011 through 17 August 2011
ER -