Acta Phys. -Chim. Sin. ›› 1989, Vol. 5 ›› Issue (03): 260-263.doi: 10.3866/PKU.WHXB19890302

• Communication • Previous Articles     Next Articles

PREPARATIVE AND STRUCTURAL STUDIES ON SUPERCONDUCTING PHASE TLI2Ca3Ba2Cu4O12

Zhou Dingyun; Zhu Wenjie*; Chen Fengxiang; Li Neng; Lin Bingxiong; Tang Youqi; Chen Kaixuan; Lu Guo   

  1. Laboratory for Applied Physical Chemistry Institute of Physical Chemistry Peking University

    Physics Department; Peking University

  • Received:1989-02-04 Revised:1900-01-01 Published:1989-06-15
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Abstract:

The superconducting phase Tl_2Ca_3Ba_2Cu_40_(12), with Tc=108K and Meissner effect 66%, has been prepared. The unit cell is body-centred tetragonal, space group D_(4h)~(17)/mmm, lattice parameters a=0.3854(1)nm, c=4.2070(11)nm. In crystal two structural units{(O_2Cu)(BaO)(TlO_2Tl)(OBa)(CuO_2)}are separated by two CaCuO_2 slabs. Also, the relation between c axial increment and Tc in double Tl-O layer system is discussed.