STUDY OF INTERFACES AND SURFACES OF YBa_2Cu_3O_(7-x)-Ag

Acta Metall Sin

1992, Vol. 28

Issue (7): 70-73 DOI:

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STUDY OF INTERFACES AND SURFACES OF YBa_2Cu_3O_(7-x)-Ag

FAN Yongnian; TANG Baozhen; QIAO Guiwen (Institute of Metal Research; Academia Sinica; Shenyang)

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FAN Yongnian; TANG Baozhen; QIAO Guiwen (Institute of Metal Research; Academia Sinica; Shenyang). STUDY OF INTERFACES AND SURFACES OF YBa_2Cu_3O_(7-x)-Ag. Acta Metall Sin, 1992, 28(7): 70-73.

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Abstract Interfaces and surfaces of YBa_2Cu_3O_(7-x) (YBCO)-Ag have been studied by SEM-EDX and AES. No effect of Ag on 123 structure in X-ray diffraction pattern was observed for 0.4 mol Ag doped YBCO. AES analysis indicated that Ag segregated on surface of YBCO and resulted in decrease of YBCO-metal lead resistance. In addition, solution and segregation of Ag as elemental state were often appreared on interfaces and surfaces of high temperature annealed YBCO, whether elemental Ag or compound Ag_2O and AgNO_3 adopted as doping material.

Key words: YBa_2Cu_3O_(7-x) Ag interface surface segregation

Received: 18 July 1992

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