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Titolo:
A COMPARATIVE-STUDY ON THE MICROWAVE PENETRATION DEPTH OF VARIOUS Y1BA2CU3O7-DELTA THIN-FILMS USING A NONCONTACT METHOD
Autore:
LEE SY; KIM GB; LIM ST; KANG WN; HAHN TS; CHOI SS; OH B; CHOI YW; MOON SH; DENISOV AG;
Indirizzi:
KON KUK UNIV,DEPT PHYS SEOUL 133701 SOUTH KOREA KOREA ADV INST SCI & TECHNOL SEOUL 136791 SOUTH KOREA GOLDSTAR CENT RES LAB SEOUL 137140 SOUTH KOREA STATE RES CTR SUPERCONDUCT RADIOELECTR KIEV UKRAINE
Titolo Testata:
Physica. C, Superconductivity
fascicolo: 1-2, volume: 244, anno: 1995,
pagine: 63 - 70
SICI:
0921-4534(1995)244:1-2<63:ACOTMP>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
TEMPERATURE-DEPENDENCE; SUPERCONDUCTORS; YBA2CU3O7-DELTA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
S.Y. Lee et al., "A COMPARATIVE-STUDY ON THE MICROWAVE PENETRATION DEPTH OF VARIOUS Y1BA2CU3O7-DELTA THIN-FILMS USING A NONCONTACT METHOD", Physica. C, Superconductivity, 244(1-2), 1995, pp. 63-70

Abstract

Microwave properties of various YBCO thin films in the form of stripline resonators are studied using a non-contact method. Q factors, insertion losses and the resonant frequency shift of the resonators are measured in frequencies of 8 to 12 GHz at temperatures above the liquid nitrogen temperature. The resonant frequency shift to a lower value isobserved upon an increase in temperature in all resonators, which is explained using the temperature dependence of the magnetic penetrationdepth in the form of lambda(T)=lambda(0)[1-(T/T-c)(n)](-1), with the value of n=2 or 4. The fitted values of lambda 0 with n=2 appear smaller than the corresponding values with n=4, indicating that the same value of n is to be used if the magnetic penetration depths of differenthigh-T-c superconducting (HTS) thin films are to be compared. The results also show that the penetration depth of a YBCO film can be different depending on the fabrication method as well as on the thickness ofthe film, implying that minimization of signal loss cannot be accomplished simply by using a HTS film with a thickness more than a few magnetic penetration depths of a single crystal of YBCO.

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Documento generato il 09/07/20 alle ore 00:56:23