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2004 | 106 | 5 | 681-685
Article title

Study of Excimer Laser Irradiation Effects on Properties of Crystalline YBaCuO Thin Films

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EN
Abstracts
EN
The influence of UV laser irradiation on the physical properties of epitaxial YBa_2Cu_3O_{7-δ} thin (<1μm) films fabricated by laser ablation was studied. The samples were irradiated by pulsed excimer laser beam at different incident energy densities E_{ir}≤130 mJ/cm^2, i.e. 2-3 times below the ablation threshold of YBaCuO. The analysis of the sample cross-section using transmission electron microscope shows that such irradiation forms a disordered layer on the top of the crystalline film. Sample surface amorphization was observed also by atomic force microscope. Due to strong UV irradiation absorption in YBaCuO this surface layer acts like a protective cover for the sample interior. Only a small reduction of superconducting critical temperature T_c was observed. Both transport measurements in normal state and magneto-optical studies in superconducting state indicate that between the disordered layer and the bottom non-modified part of the film there exists a wide transitional region with reduced carrier concentration.
Keywords
Publisher

Year
Volume
106
Issue
5
Pages
681-685
Physical description
Dates
published
2004-11
received
2004-06-06
Contributors
author
  • Instytut Fizyki PAN, al. Lotników 32/46, 02-668 Warszawa, Poland
  • Instytut Fizyki PAN, al. Lotników 32/46, 02-668 Warszawa, Poland
  • Instytut Fizyki PAN, al. Lotników 32/46, 02-668 Warszawa, Poland
  • Laboratoire des Solides Irradiés, CNRS-UMR 7642 and CEA/DSM/DRECAM, Ecole Polytechnique, 91128 Palaiseau Cedex, France
  • Laboratoire des Solides Irradiées, CNRS-UMR 7642 and CEA/DSM/DRECAM, Ecole Polytechnique, 91128 Palaiseau Cedex, France
author
  • Laboratoire des Solides Irradiées, CNRS-UMR 7642 and CEA/DSM/DRECAM, Ecole Polytechnique, 91128 Palaiseau Cedex, France
author
  • Istituto di Fotonica e Nanotecnologie - CNR, Via Cineto Romano 42, 00156 Roma, Italy
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv106n516kz
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