Solid State Science and Technology, Vol. 15, No 1 (2007) 6-12

ISSN 0128-7389

 

Corresponding Author: ema_1006@yahoo.com

 

SOUND VELOCITY IN Zn SUBSTITUTED

HoBa2(Cu3-xZnx)O7-δ  SUPERCONDUCTOR

 

Aima Ramli and R. Abd-Shukor

School of Applied Physics, Faculty of Science and Technology

Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor

 

ABSTRACT

Ultrasonic longitudinal and shear velocities were measured in superconducting HoBa2(Cu3-xZnx)O7-δ  (x = 0, 0.01, 0.05) at 5-10 MHz between 80 K and 300 K. The characteristic Debye temperature was determined and the electron-phonon coupling constant was calculated using the BCS theory in the weak coupling limit and the van Hove scenario. The variation in the elastic behaviors upon Zn doping is attributed to the effect of changes in the spin correlation at the CuO2 planes due to Zn doping.

 

http://journal.masshp.net/wp-content/uploads/Journal/2007/Jilid%201/Aima%20Ramli%206-12.pdf

 

REFERENCES

[1]       H. Alloul, J. Bobroff, P. Mendels (1997).  Phys. Rev. Lett. 78: 2494-2499.

[2]       K. Yahya, N.A. Hamid, R.Abd-Shukor (2004).  Ceramics International, 30(7):

1597-1601.

[3]       R. Abd-Shukor (2002). Superconductor Science and Technology 15(3): 435-

438.

[4]       J. M. Getino, H. Rubio and M. de Llano (1992). Solid State Communication

83(11) : 891-893.

[5]       L.G.   Mamsurova,    K.S.   Pigalskiy,    V.P.   Sakun,   A.I.   Shushin,   L.G.

Scherbakova, ( 1990). Physica C 167 11-21.