Optimization of the Superconducting Properties of Laser Ablated YBa_2Cu_3O_{7-δ} Films on CeO_2-Buffered Sapphire

• Authors: I. Abal'osheva , I. Zaytseva , M. Aleszkiewicz , Y. Syryanyy , P. Gierłowski , O. Abal'oshev , V. Bezusyy , M. Cieplak
• Languages of publication: EN

Abstracts

EN

We use pulsed laser deposition to grow YBa_2Cu_3O_{7-δ} (YBCO) superconducting films for microwave applications. The films are grown on R-cut sapphire substrates, with CeO_2 buffer layers, which are re-crystallized at high temperature prior to YBCO growth. Using the atomic force microscopy (AFM) and X-ray diffractometry we determine the optimal temperature for recrystallization (1000°C) and the optimal buffer layer thickness (30 nm). The properties of YBCO films of various thickness, grown on the optimized CeO_2 buffer layers, are studied using several methods, including AFM, magnetooptical imaging, and transport experiments. The YBCO film roughness is found to increase with the increasing film thickness, but the magnetic flux penetration in the superconducting state remains homogeneous. The superconducting parameters (the critical temperature and the critical current density) are somewhat lower than the similar parameters for YBCO films deposited on mono-crystalline substrates.

Keywords

EN

74.78.-w; 77.55.Px; 81.15.Fg

Discipline

• 74.78.-w: Superconducting films and low-dimensional structures
• 77.55.Px: Epitaxial and superlattice films
• 81.15.Fg: Pulsed laser ablation deposition

• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 4
• Pages: 805-807

Dates

published

2012-04

Contributors

author

I. Abal'osheva

• Polish Academy of Sciences, Institute of Physics, al. Lotników 32, 02-668 Warszawa, Poland

author

I. Zaytseva

• Polish Academy of Sciences, Institute of Physics, al. Lotników 32, 02-668 Warszawa, Poland

author

M. Aleszkiewicz

• Polish Academy of Sciences, Institute of Physics, al. Lotników 32, 02-668 Warszawa, Poland

author

Y. Syryanyy

• Polish Academy of Sciences, Institute of Physics, al. Lotników 32, 02-668 Warszawa, Poland

author

P. Gierłowski

• Polish Academy of Sciences, Institute of Physics, al. Lotników 32, 02-668 Warszawa, Poland

author

O. Abal'oshev

• Polish Academy of Sciences, Institute of Physics, al. Lotników 32, 02-668 Warszawa, Poland

author

V. Bezusyy

• Polish Academy of Sciences, Institute of Physics, al. Lotników 32, 02-668 Warszawa, Poland

author

M. Cieplak

• Polish Academy of Sciences, Institute of Physics, al. Lotników 32, 02-668 Warszawa, Poland

References

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• 3. X.D. Wu, R.C. Dye, R.E. Muenchausen, S.R. Foltyn, M. Maley, A.D. Rollett, A.R. Garcia, N.S. Nogar, Appl. Phys. Lett. 58, 2165 (1991)
• 4. M. Spankova, I. Vavra, S. Gazi, D. Machajdk, S. Chromik, K. Frohlich, L. Hellemans, S. Benacka, J. Cryst. Growth 218, 287 (2000)
• 5. Sørensen, Solid State Chem. 18, 217 (1976)
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Identifiers

DOI

10.12693/APhysPolA.121.805