YBa_2Cu_3O_7磁取向粉末中Cu的NMR和NOR研究  

Studies on NMR and NQR of Cu in Magnetic Oriented Powder YBa_2Cu_3O_7

作　　者：董正超[1] 邬学文[1] 徐曙[1] 许亮[1] 李鲠颖[1] 边明华[1] 张惠平[1] 

机构地区：[1]华东师范大学分析测试中心

出　　处：《华东师范大学学报（自然科学版）》1991年第4期33-41,共9页Journal of East China Normal University(Natural Science)

摘　　要：制备了YBa_2Cu_3O_7的磁取向粉末样品,在室温下(293K)对Bo∥C轴和B_0⊥C轴两种情况下,测量了Cu(Ⅰ)和Cu(Ⅱ)的NMR谱和NQR谱.通过分析,求得Cu(Ⅰ)和Cu(Ⅱ)的各向异性电场强度梯度、奈特位移和Cu(Ⅱ)的各向异性的自旋晶格弛豫时间.Several samples of magnetic oriented powder YBa_2Cu_3O_(7-8) were prepared.Under room temperature (293K), the NMR and NQR spectra of Cu(l) and Cu(2) at B_0/C or B_0⊥C were measured.Through analysis, the anisotropic electric field gradient, knight shift of Cu(l) and Cu(2) were calculated.Besides, the NMR anisotropic spin-lattice relaxation time of Cu (2) were measured and compared with the NQR spin-lattice relaxation time.

关 键 词：磁取向粉末 YBACUO CU NMR NQR 

分 类 号：O511.2[理学—低温物理]