中国物理B ›› 2009, Vol. 18 ›› Issue (7): 2893-2897.doi: 10.1088/1674-1056/18/7/045
慎晓丽, 李正才, 申彩霞, 陆伟, 董晓莉, 周放, 赵忠贤
Shen Xiao-Li(慎晓丽), Li Zheng-Cai(李正才), Shen Cai-Xia(申彩霞), Lu Wei(陆伟), Dong Xiao-Li(董晓莉), Zhou Fang(周放)†, and Zhao Zhong-Xian(赵忠贤)
摘要: We have grown underdoped (x = 0.11, 0.12) and optimally doped (x = 0.16) La2-xSrxCuO4 single crystals by the traveling-solvent floating-zone technique. In order to prepare good quality cuprate crystals, we have made much effort to optimize the preparation procedures. For example, we haveadopted the sol--gel route to prepare a highly fine and homogeneous La2-xSrxCuO4 precursor powder for fabricating a very dense ceramic feed rod used for the floating-zone growth, and we have also used quite a slow growth rate. The high quality of the grown crystals has been verified by double-crystal x-ray rocking curves, with the full-width-at-half-maximum being only 113--150 arcseconds, which are the best data reported so far for La2-xSrxCuO4 crystals. The superconducting critical temperatures of the grown crystals are 30, 31 and 38.5~K for x = 0.11, 0.12 and 0.16 samples, respectively, according to magnetic measurements.
中图分类号: (Growth from melts; zone melting and refining)