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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:j_c(77K)大于10〜6 A / cm〜2的微米厚Sr基(Hg,Pb)-1223薄膜

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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:首次使用两步法合成了(00l)取向的基于Sr的(Hg,Pb)-1223薄膜。已通过MOCVD或PLD沉积了厚度为1μm的无汞前体薄膜,然后将其与合成的(Hg,Pb)-1223陶瓷或相同阳离子组成的压制前体混合物一起在密封的石英安瓿瓶中退火。这些膜没有在氧气中进行后退火。 PLD膜的相组成关键取决于前体膜的沉积温度。根据XRD,最好的MOCVD薄膜主要包含(Hg,Pb)-1223和少量的非超导相。对于MOCVD样品,测得T_c = 118K,j_c(77K,0.01T)= 2.5×10 6 A / cm 2。

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