Acta Metallurgica Sinica (English Letters) ›› 1991, Vol. 4 ›› Issue (8): 139-142.

• Research paper • Previous Articles     Next Articles

MOSSBAUER EFFECT STUDY OF YBa_2Cu_(3-x)Sn_xO_(7-y)SYSTEM

WANG Genmiao ZHANG Han ZHANG Qirui WU Yonghua University of Science and Technology of China,Hefei,China   

  • Received:1991-08-11 Revised:1991-08-11 Online:1991-08-11 Published:2009-10-10

Abstract: Mssbauer spectra measurements reveal that Sn exists in YBa_2Cu_(3_x)Sn_xO_(7_y) system (x=0.05,0.10,0.20,0.30 and 0.40)in form of Sn~(4+) and occupies Cu(1)and Cu(2)sites.The relative rate at which Sn~(4+) occupies Cu(1)or Cu(2)sites varies with x.The superconductivity transition temperature,T_c,depresses slightly due to the substitution of Cu for Sn.

Key words: Y-Ba-Cu-O system, M(?)ssbauer spectrum, substitution, superconductivity transition temperature