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Nanodots induced columnar growth of YBa2Cu3Ox films

Mikheenko, P.; Tanner, J. L.; Bowen, J.; Sarkar, A.; Dang, V.-S.; Abell, J. S. and Crisan, A. (2010). Nanodots induced columnar growth of YBa2Cu3Ox films. Physica C: Superconductivity, 470(Sup.1) S234-S236.

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We report columnar growth of YBa2Cu3Ox (YBCO) films by pulsed laser deposition using nanodots of Au, Ag and Pd deposited on SrTiO3 substrate prior to the growth of the film. The nanodots initiate formation of densely packed YBCO columns with c-axis along the length of the columns. The obtained columnar structure offers enhanced pinning of magnetic flux and provides high critical current density in a magnetic field directed along the c-axis of YBCO while keeping high critical current density for other directions of magnetic field. The evidence of columnar structure is given by the planar and cross-sectional atomic force microscopy, transmissional election microscopy and rotational transport measurements of critical current. By creating the columnar structure, an improvement of critical current up to about 200% is achieved comparable to the reference samples without nanodots in a wide range of magnetic field and thickness of the samples. The largest increase in critical current is observed in magnetic fields close to the matching field calculated from the density of nanoparticles or density of YBCO columns.

Item Type: Journal Item
Copyright Holders: 2009 Elsevier B.V
ISSN: 0921-4534
Extra Information: Proceedings of the 9th International Conference on Materials and Mechanisms of Superconductivity
Keywords: superconducting; films; critical current; nanodots; pinning
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 43192
Depositing User: James Bowen
Date Deposited: 15 Jun 2015 09:57
Last Modified: 07 Dec 2018 10:31
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