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HIGH TEMPERATURE SUPERCONDUCTORS 
C. N. R. Rao and A. K. Raychaudhuri 

The following tables give properties of a number of high temperature superconductors. Table 1 lists the crystal structure (space group and lattice 
constants) and the critical transition temperature T c for the more important high temperature superconductors so far studied. Table 2 gives energy gap, 
critical current density, and penetration depth in the superconducting state. Table 3 gives electrical and thermal properties of some of these materials 
in the normal state. The tables were prepared in November 1992 and updated in November 1994. 

REFERENCES 

1 . Ginsburg, D.M., Ed., Physical Properties of High-Temperature Superconductors, Vols. I— ill, World Scientific, Singapore, 1989—1992. 

2 . Rao, C.N.R., Ed., Chemistry of High-Temperature Superconductors, World Scientific, Singapore, 1 99 1 . 

3. Shackelford, J.F., The CRC Materials Science and Engineering Handbook, CRC Press, Boca Raton, 1992, 98—99 and 122—123. 

4. Kaldis, E. , Ed., Materials and Crystallographic Aspects ofHT c -Superconductivity, K luwer Academic Publ. , Dordrecht, The Netherlands, 1 992. 

5. Malik, S.K. and Shah, S.S., Ed., Physical and Material Properties of High Temperature Superconductors, Nova Science Publ., Commack, 
N.Y., 1994. 

6. Chmaissem, O. et. al., Physica, C230, 23 1—238, 1994. 

7. Antipov, E.V. et. al., Physica, C215, 1—10, 1993. 

Table 1 

Structural Parameters and Approximate T c Values of High-Temperature Superconductors 



Material Structure T^K (maximum value) 

La 2 Cu0 4+6 Bmab; a = 5.355, b = 5.401, c- 13.15 A 39 

U 2 . x Sr x (Ba^Cu0 4 I4/mmm; a = 3.779, c = 1 3.23 A 35 

U 2 Ca Ujc Sr r Cu 2 0 6 I4/mmm; a = 3.825, c = 19.42 A ^ 60 

YBa 2 Cu 3 0 7 Pmmm; a = 3.821, b = 3.885, c - 1 1.676 A 93 

YBa 2 Cu 4 0 8 Ammro; a = 3.84, b = 3.87, c = 27.24 A ^ 80 

Y 2 Ba4Cu 7 0 15 Ammm; a = 3.851, b = 3.869, c = 50.29 A 93 

Bi 2 Sr 2 Cu0 6 Amaa; a = 5.362, b = 5.374, c = 24.622 A 10 

Bi 2 CaSr 2 Cu 2 0 8 A 2 aa; a = 5.409, b = 5.420, c = 30.93 A 92 

Bi 2 Ca 2 Sr 2 Cu 3 O 10 A 2 aa; a = 5.39, b = 5.40, c = 37 A 110 

B^Sr^Ln^Ce^CuAo P4/mmm; a = 3.888, c = 17.28 A ^ 25 

Tl 2 Ba 2 Cu0 6 A 2 aa; a = 5.468, b = 5.472, c = 23.238 A; 

I4/mmm; a = 3.866, c = 23.239 A 92 

Tl 2 CaBa 2 Cu 2 0 8 I4/mmm; a = 3 .855, c = 29.3 1 8 A 119 

Tl 2 Ca 2 Ba 2 Cu,O 10 I4/mmm; a = 3.85, c = 35.9 A 128 

Tl(BaLa)Cu0 5 P4/mmm; a = 3.83, c = 9.55 A 40 

Tl(SrLa)Cu0 5 P4/mmm; a = 3.7, c = 9 A 40 

(Tl a5 Pb a5 )Sr 2 Cu0 5 P4/mmm; a = 3.738, c = 9.01 A 40 

TlCaBa 2 Cu 2 0 7 P4/mmm; a = 3.856, c = 12.754 A 103 

(Tlo.5Pb a 5)CaSr 2 Cu 2 0 7 P4/mmm; a = 3.80, c = 12.05 A 90 

TlSr 2 Y 0 . 5 Ca 0 . 5 Cu 2 O 7 P4/mmm; a = 3.80, c = 12. 10 A 90 

TlCa 2 Ba 2 Cu 3 0 8 P4/mmm; a = 3.853, c = 15.913 A 1 10 

(Tlo. 5 Pbo.5)Sr 2 Ca 2 Cu 3 0 9 P4/mmm; a = 3.8 1 , c = 1 5.23 A 120 

TlBa 2 (Lai. J CeJ 2 Cu 2 0 9 I4/mmm; a = 3.8, c = 29.5 A ^ 40 

Pb^LaosCaosCuPg Cmmm; a = 5.435, b = 5.463, c = 15.817 A 70 

Pb 2 (Sr,La) 2 Cu 2 0 6 P22i2; a = 5.333, 6 = 5.421, c = 12.609 A 32 

(Pb,Cu)Sr 2 (La,Ca)Cu 2 0 7 P4/mmm; a = 3.820, c = 1 1 .826 A 50 

(Pb£u)(Sr,Eu)(Eu,Ce)Cu 2 O jr I4/mmm; a = 3.837, c = 29.0 1^ A 25 

Nd 2 . x Ce^Cu0 4 I4/mmm; a = 3.95, c = 12.07 A 30 

Ca^Sr^CuOj P4/mmm; a = 3.902, c = 3.35 A^ 110 

Sr,. x Nd JC Cu0 2 P4/mmm; a = 3,942, c = 3.393 A 40 

Bao.6Ko.4Bi0 3 Pm3m; a = 4.287 A 3 1 

Rb 2 CsC 60 a = 14.493 A 31 

NdBa 2 Cu 3 0 7 Pmmm; a = 3.878, b = 3.913, c = 1 1 .753 58 



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