Nonlinear surface resistance in YBa/sub 2/Cu/sub 3/O/sub 7-x/ thin films

Author

Oates, D.E. ; Nguyen, P.P. ; Dresselhaus, G. ; Dresselhaus, M.S. ; Chin, C.C.

Author_Institution

Lincoln Lab., MIT, Lexington, MA, USA

Volume

3

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

1114

Lastpage

1119

Abstract

A complete characterization of the nonlinearity of the surface impedance Z/sub s/ of YBa/sub 2/Cu/sub 3/O/sub 7-x/ thin films is presented. Z/sub s/(H/sub rf/, the RF magnetic field), has been measured for H/sub rf/ from 0 to approximately 1 kOe vs. temperature from 4.2 K to critical temperature T/sub c/ and vs. frequency from 1.5 to 10 GHz, using a stripline resonator. The results are compared to a coupled-grain model. Good agreement is found for R/sub s/(H/sub rf/). The imaginary part of Z/sub s/(H/sub rf/), i.e. X/sub s/(H/sub rf/), however, does not fit the model.<>

Keywords

barium compounds; grain size; high-temperature superconductors; magnetic field effects; sputtered coatings; superconducting thin films; surface phenomena; yttrium compounds; 1.5 to 10 GHz; 4.2 K; HTSC; RF magnetic field; YBa/sub 2/Cu/sub 3/O/sub 7-x/; grain size; off-axis sputtering; surface impedance; thin films; Distortion measurement; Electrical resistance measurement; Laboratories; Magnetic field measurement; Physics; Stripline; Superconducting microwave devices; Surface impedance; Surface resistance; Transistors;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

Conference_Location

3/1/1993 12:00:00 AM

ISSN

1051-8223

Type

jour

DOI

10.1109/77.233359

Filename

233359