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Micron-Thick Sr-Based (Hg,Pb)-1223 Films with j_c(77K) of above 10~6 A/cm~2

机译:微米厚的SR基(HG,PB)-1223薄膜,J_C(77K)高于10〜6A / cm〜2

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For the first time the (00l)-oriented Sr-based (Hg,Pb)-1223 films have been synthesized using the two-step procedure. Hg-free precursor films with the thickness of 1 μm have been deposited by MOCVD or PLD and then the films were annealed in sealed quartz ampoules together with synthesised (Hg,Pb)-1223 ceramics or a pressed precursor mixture of the same cation composition. No post-annealing in oxygen was used for these films. The phase composition of the PLD-films depended crucially on the deposition temperature of the precursor films. The best MOCVD films contained predominantly (Hg,Pb)-1223 and small amounts of non-superconducting phases according to XRD. The T_c=l18 K and j_c(77K,0.01T) = 2.5X10~6 A/cm~2 were measured for the MOCVD-samples.
机译:首次使用两步过程合成(001)基于SR的SR基(Hg,Pb)-123膜。通过MOCVD或PLD沉积了厚度为1μm的无HG的前体薄膜,然后将膜与合成(Hg,Pb)-123陶瓷或相同阳离子组合物的压制前体混合物一起退火薄膜用密封的石英安瓿。对于这些薄膜,使用氧后退火未进行退火。 PLD膜的相组合物至关重要依赖于前体膜的沉积温度。根据XRD,主要包含的最佳MOCVD薄膜主要(Hg,Pb)-1223和少量非超导相。测量MOCVD样品的T_C = L18 k和J_C(77K,0.01T)= 2.5x10〜6a / cm〜2。

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