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Temperature and current dependent resistivity are investigated in the single YBa2Cu3O7 layer and the YBa2Cu3O7∕Nd0.7Ca0.3MnO3 (YBCO∕NCMO) bilayer with the thickness of each layer being 200nm. Our results show that the onset temperature (Tcon) of the superconducting transition in YBCO layer is linearly suppressed by current with a rate of 0.1K∕mA. However, Tcon of the NCMO∕YBCO bilayer is reduced effectively from 54to30K with increasing the applied current from 1to40mA, which indicates an enhanced effect of pair breaking by the polarized quasiparticles.
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Lin et al. (2007) studied this question.
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