All high- Tc superconductors are susceptible to humid environment. The mechanism behind this degradation process is not yet well known or even described. In an attempt to understand the mechanism, we studied the real-time degradation process of HgBa2CaCu2O6+δ (Hg-1212) thin film using scanning probe microscopy (SPM) techniques. A newly developed near-field scanning microwave and optical dual probe was employed to map simultaneously the spatial variation of microwave sheet resistance and optical transmittance of a sample. Mapping was performed at a regular time interval while the sample was exposed to a very high level of humidity (85%-90%). In a separate experiment, atomic force microscope (AFM) was used to monitor the surface roughness of a sample subjected to the same level of humidity. Results indicate that the degradation process of Hg-1212 involves the gradual transformation of the material into a colorless insulator accompanied by continuous surface deformations.
This is a preview of subscription content, access via your institution.
Buy single article
Instant access to the full article PDF.
Tax calculation will be finalised during checkout.
W.N. Kang, R.L. Meng and C.W. Chu, Appl. Phys. Lett. 73, 381 (1998)
S.L. Yan, Y.Y. Xie, J.Z. Wu, T. Aytug, A.A. Gapud and B.W. Kang, Appl. Phys. Lett. 73, 2989 (1998)
R.S. Aga, S.L. Yan, Y.Y. Xie, S. Han, J.Z. Wu, Q.X. Jia and C. Kwon, Appl. Phys. Lett. 76, 1606 (2000)
D.E. Steinhauer, C.P. Vlahacos, S.K. Dutta, F.C. Wellstood and S.M. Anlage, Appl. Phys. Lett. 71, 1736 (1997).
E. Betzig, J.K. Trautman, T.D. Harris, J.S. Weiner and R.L. Kostelak, Science 251, 1468 (1991).
R.S. Aga, Jr. and J.Z. Wu (unpublished).
J.Z. Wu, S.L. Yan and Y.Y. Xie, Appl. Phys. Lett. 74, 1469 (1999).
About this article
Cite this article
Aga, R.S., Xie, YY. & Wu, J.Z. Real-time Degradation Study of HgBa2CaCu2O6+δ?Thin Film Using Near-field Scanning Microwave and Optical Dual Probe. MRS Online Proceedings Library 689, 39 (2001). https://doi.org/10.1557/PROC-689-E3.9