钇钡铜氧超导材料的激光等离子体质谱研究

LASER PLASMA MASS SPECTROMETRY OF YBa_2Cu_3O_(7-x) SUPERCONDUCTING SAMPLE

尽管金属氧化物高温超导材料的发现及“超导热”的兴起己有五年多的历史,有关的研究仍在不断发展与深化.近年的研究发现,以激光蒸发可以沉积出高质量的金属氧化物的超导薄膜.Balooch 等以波长为1.06μm 的长脉冲激光作用于YBa_2Cu_3O_(7-x)(YBCO)样品,记录了所产生的中性物种的飞行时间质谱.

Time-of-flight mass spectra of both positive and negative ions were recorded on a home-madeinstrument by laser ablation of YBa_2Cu_3O_(7-x) superconducting material.Among the observedcations,Ba^+ has the highest intensity,and Cu^- for anions.In addition,three seires of oxidesclusters cations of very broad mass range were observed,with compositions of BaYO_2(Y_2O_3)_n,Ba_2YO_3(Y_2O_3)_n and BaCuYO_3(Y_2O_3)_n.The experimental results were disscused and attributedto the interactions among consisting elements.As comparision,the samples of the CuO,Y_2O_3 andBaO as well as their mixture have also been studied in the same experimental condition.