Magnetic penetration depth and pinning behavior in Bi2Sr2Ca1-xPrxCu2O y single crystals

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Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China ^{[1
]}

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Prog Nat Sci | / 12卷 / 939-941期

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Bismuth compounds - Calcium compounds - Copper oxides - Doping (additives) - Praseodymium - Praseodymium compounds - Single crystals - Strontium compounds;

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摘要：

Pr-doping effects on the penetration depth and pinning behavior of Bi2Sr2Ca1-x,PrxCu2O y single crystals have been studied systematically. It was found that Pr scattering modifies the temperature dependence of penetration depth from linear behavior to square behavior, which strongly supports the d-wave symmetry of order parameter. The substitution of Pr for Ca weakens the CuO interlayer coupling, which causes the decreases of irreversibility line Bin(T). It is believed that the irreversibility line originates from vortex depinning.

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