Anomalies in nonlinear microwave surface impedance of YBCO thin films on MgO: Superconductor versus substrate effects

IEEE Transactions on Applied Superconductivity

Volumn 13, Issue 2 III, 2003, Pages 3598-3601

  Velichko, A V ^a   Huish, D W ^a   Lancaster, M J ^a   Porch, A ^b  

^a UNIVERSITY OF BIRMINGHAM   (United Kingdom)

^b CARDIFF UNIVERSITY   (United Kingdom)

Author keywords

Anomalous response; DC magnetic field; High temperature superconductor; Microwave nonlinearity

Indexed keywords

ELECTRIC IMPEDANCE; LOW TEMPERATURE EFFECTS; MAGNESIA; MAGNETIC FIELD EFFECTS; RESONATORS; SUPERCONDUCTING MATERIALS; YTTRIUM BARIUM COPPER OXIDES;

MICROWAVE NONLINEARITY;

THIN FILMS;

EID: 0042475203     PISSN: 10518223     EISSN: None     Source Type: Journal    
DOI: 10.1109/TASC.2003.812407     Document Type: Conference Paper

References (11)

1. M. A. Hein, High-Temperature Superconductor Thin Films at Microwave Frequencies: Springer, 1999, ch. 3 and 4. and references therein.
2. D. P. Choudhury, B. A. Willemsen, J. S. Derov, and S. Sridhar, "Nonlinear response of HTSC thin film microwave resonators in an applied DC magnetic field," IEEE Trans. Appl. Supercond., vol. 7, pp. 1260-1263, June 1997.
3. 7-δ films at microwave frequencies," J. Supercond., vol. 10, pp. 485-493, May 1997.
4. A. P. Kharel, A. V. Velichko, J. R. Powell, A. Porch, M. J. Lancaster, and R. G. Humphreys, "Unusual features in microwave surface impedance of Y-Ba-Cu-O thin films," Phys. Rev. B., vol. 58, pp. 11189-1192, November 1998.
5. c thin film in weak DC magnetic field," Physica C., vol. 316, pp. 224-228, May 1999.
6. M. A. Hein, P. Hirst, R. G. Humphreys, D. E. Oates, and A. V. Velichko, cond-mat/0105613, unpublished, 2001.
7. _, Appl. Phys. Lett., vol. 80, pp. 1007-1009, 2002.
8. 7-δ thin films," IEEE Trans. MTT, vol. 43, pp. 306-314, February 1995.
9. A. V. Velichko, A. Porch, M. J. Lancaster, and R. G. Humphreys, "Anomalous features in the surface impedance of Y-Ba-Cu-O thin films: dependence on frequency, RF and DC fields," IEEE Trans. Appl. Supercond., vol. 11, pp. 3497-3500, June 2001.
10. Due to the paper size limitation, the results for TF3 are not shown here, but are very similar to those for TF2.
11. A. V. Velichko, M. J. Lancaster, R. A. Chakalov, and F. Wellhofer, "Anomalies in the microwave power-dependent surface impedance of Y-Ba-Cu-O thin films," Phys. Rev. B., vol. 65, pp. 104522-1-104522-14, March 2002.