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通过三氟乙酸盐-金属有机物沉积方法(TFA-MOD)研究了Ce掺杂对钇钡铜氧(YBCO)超导薄膜性能的影响.观察到10 mol%Ce掺杂使YBCO超导薄膜的c轴取相降低,出现明显的a轴晶粒,薄膜表面变得粗糙.尽管超导临界温度稍有减小,其超导临界电流密度(Jc)在高磁场下性能获得了有效提高,当外磁场强度达到2T时,超导薄膜的钉扎力(Fp)达到了5 GN/m3,比纯YBCO的Fp提高了近30%.通过磁化临界电流密度对磁场的依赖关系得出了两种特征的磁场强度,即不可逆场和单磁场匹配场,由此获得了磁热相图及其受掺杂量的影响,一个明显的特征是65K温度下的不可逆场Hirr提高了近65%.
The effect of Ce doping on the properties of yttrium barium copper oxide (YBCO) superconducting thin films was investigated by the TFA-MOD method. The effect of Ce doping on the properties of YBCO superconducting thin films c-axis phase declines, a significant a-axis grain appears, the surface of the film becomes rough.Although supercritical critical current density (Jc) is improved effectively in high magnetic field, When the external magnetic field strength reaches 2T, the pinning force (Fp) of the superconducting thin film reaches 5 GN / m3, which is nearly 30% higher than that of the pure YBCO. By the dependence of the critical magnetization current on the magnetic field, The characteristic magnetic field strength, ie, irreversible field and single-field matching field, results in the magnetocaloric phase diagram and its effect on the amount of doping. An obvious feature is that the irreversible field Hirr at 65K is increased by nearly 65%.