高性能Y0．5Gd0．5BCO薄膜的研究  

Study on Superior Property of Y_(0.5)Gd_(0.5)BCO Films

作　　者：吴紫平[1] 索红莉[1] 刘敏[1] 叶帅[1] 汤潇[1] 

机构地区：[1]北京工业大学材料科学与工程学院,国家教育部功能材料重点实验室,北京100124

出　　处：《无机材料学报》2010年第12期1273-1276,共4页Journal of Inorganic Materials

基　　金：国家973计划(2006CB601005);国家自然科学基金(50802004);北京市自然科学基金(2092006)~~

摘　　要：通过在YBCO前驱溶液中加入醋酸钆(Gd(CH_3COO)_3),使元素Gd部分取代Y,成功地制备了Y_(0.5)Gd_(0.5)BCO薄膜,该薄膜成分单一且具有很好的c轴取向.通过对Y_(0.5)Gd_(0.5)BCO薄膜和YBCO、GdBCO薄膜的超导性能比较发现,虽然Y_(0.5)Gd_(0.5)BCO薄膜的临界转变温度(T_c)(约为90.5 K)较YBCO和GdBCO薄膜有所下降,但是在65K、自场下,Y_(0.5)Gd_(0.5)BCO薄膜具有最高的临界电流密度(J_c)值,为4.87MA/cm^2.且随着外加磁场的增加,J_c值提高的较多.在3T的磁场下,Y_(0.5)Gd_(0.5)BCO薄膜的J_c值分别是纯GdBCO和YBCO薄膜的1.8倍和5.1倍.此外,替代还有效提高了薄膜的磁通钉扎力.The Y0.5Gd0.5BCO film was successfully fabricated by fluorine-reduced MOD method through dissolving Gd（CH3COO）3 into the precursor solution. As a result, Y was partially substituted by Gd and all the films have well c-axis orientation. By comparing the superconducting properties, it is found that the Y0.5Gd0.5BCO film has lower critical transition temperature Tc （90.5K） than that of the pure YBCO and GdBCO films. Yet the Y0.5Gd0.5BCO film has the highest critical current density dc value about 4.87MA/cm^2 at 65K and self-field. In addition, the Jc value of Y0.5Gd0.5BCO film is enhanced significantly as increasing the applied magnetic field. The Jc value of Y0.5Gd0.5BCO film is 1.8 times and 5.1 times of that of the pure GdBCO and YBCO films at 65K and 3T applied field, respectively. Furthermore, the pinning force of the Y0.5Gd0.5BCO film is effectively improved by the elemental substitutions.

关 键 词：YBCO薄膜 元素替代 低氟MOD 场性能 

分 类 号：TM26[一般工业技术—材料科学与工程]