Please use this identifier to cite or link to this item:
Title: Non-thermally activated noise power spectral density in YBa2Cu3O7-δ thin films
Authors: Han, K.-H.
Ong, P.C.
Ong, C.K. 
Issue Date: Aug-2001
Citation: Han, K.-H., Ong, P.C., Ong, C.K. (2001-08). Non-thermally activated noise power spectral density in YBa2Cu3O7-δ thin films. Superconductor Science and Technology 14 (8) : 539-542. ScholarBank@NUS Repository.
Abstract: The low-frequency noise power spectral density (PSD) of highly c-axis oriented YBa2Cu3O7-δ thin-film microbridges is measured in the temperature range 77-300 K. At room temperature, the value of the Hooge parameter, γ, is 1.8 × 10-3, which is in the range of ordinary metal films. In the normal state, the noise PSD shows the generic '1/f noise' behaviour and decreases as the temperature is decreased. The experimental data obtained in the normal state cannot be described reasonably well by Dutta-Horn's thermally activated model. Moreover, in the transition temperature (Tc) region, the noise PSD shows 1/fα behaviour with α > 1 and a noise peak appears. The noise increment in the Tc region can be explained by dimensional crossover in this novel percolation noise effect.
Source Title: Superconductor Science and Technology
ISSN: 09532048
DOI: 10.1088/0953-2048/14/8/305
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

checked on Dec 21, 2018

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.