A study on the microwave responses of YBCO and TBCCO thin films by coplanar resonator technique

Li Bin Shi; Yun Fei Wang; Yu Yang Ke; Guo Hua Zhang; Sheng Luo; Xue Qiang Zhang; Chun Guang Li; Hong Li; Yu Sheng He

doi:10.1088/1009-1963/16/10/036

A study on the microwave responses of YBCO and TBCCO thin films by coplanar resonator technique

Li Bin Shi, Yun Fei Wang, Yu Yang Ke, Guo Hua Zhang, Sheng Luo^*, Xue Qiang Zhang, Chun Guang Li, Hong Li, Yu Sheng He

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

YBa₂Cu₃O₇(YBCO) thin films have been prepared by thermal coevaporation on LaAlO₃(LAO) substrates, and Tl₂Ba₂CaCu₂O₈(TBCCO) thin films are synthesized by magnetron sputtering method on LAO substrates. The transition temperature T_c is90 K for YBCO/LAO and 104 K for TBCCO/LAO. Microwave responses of the films are studied systematically by coplanar resonator technique. Energy gaps of the films obtained are Δ₀ = 1.04k_BT_c for YBCO films and Δ₀ = 0.84k_BT_c for TBCCO films by analysing the temperature dependence of resonant frequencies of coplanar resonator. Penetration depth at 0 K λ₀ = 198 nm for YBCO films and λ₀ = 200 nm for TBCCO films could also be obtained by using the weak coupling theory and two fluid theory. Results of penetration depth and energy gap confirm the weak coupling properties of the films. In addition, microwave surface resistances R_s of YBCO/LAO and TBCCO/LAO are also investigated by analysing the quality factor and insert loss of the coplanar resonator. Surface resistance of TBCCO/LAO is less than that of YBCO/LAO, so that TBCCO/LAO films may have more potential applications.

Original language	English
Pages (from-to)	3036-3041
Number of pages	6
Journal	Chinese Physics
Volume	16
Issue number	10
DOIs	https://doi.org/10.1088/1009-1963/16/10/036
Publication status	Published - 1 Oct 2007
Externally published	Yes

Keywords

Coplanar resonator
Superconducting films
TBCCO
YBCO

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10.1088/1009-1963/16/10/036

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@article{15696ba4c19f40c2adc87c9b19d21828,

title = "A study on the microwave responses of YBCO and TBCCO thin films by coplanar resonator technique",

abstract = "YBa2Cu3O7(YBCO) thin films have been prepared by thermal coevaporation on LaAlO3(LAO) substrates, and Tl2Ba2CaCu2O8(TBCCO) thin films are synthesized by magnetron sputtering method on LAO substrates. The transition temperature Tc is90 K for YBCO/LAO and 104 K for TBCCO/LAO. Microwave responses of the films are studied systematically by coplanar resonator technique. Energy gaps of the films obtained are Δ0 = 1.04kBTc for YBCO films and Δ0 = 0.84kBTc for TBCCO films by analysing the temperature dependence of resonant frequencies of coplanar resonator. Penetration depth at 0 K λ0 = 198 nm for YBCO films and λ0 = 200 nm for TBCCO films could also be obtained by using the weak coupling theory and two fluid theory. Results of penetration depth and energy gap confirm the weak coupling properties of the films. In addition, microwave surface resistances Rs of YBCO/LAO and TBCCO/LAO are also investigated by analysing the quality factor and insert loss of the coplanar resonator. Surface resistance of TBCCO/LAO is less than that of YBCO/LAO, so that TBCCO/LAO films may have more potential applications.",

keywords = "Coplanar resonator, Superconducting films, TBCCO, YBCO",

author = "Shi, {Li Bin} and Wang, {Yun Fei} and Ke, {Yu Yang} and Zhang, {Guo Hua} and Sheng Luo and Zhang, {Xue Qiang} and Li, {Chun Guang} and Hong Li and He, {Yu Sheng}",

year = "2007",

month = oct,

day = "1",

doi = "10.1088/1009-1963/16/10/036",

language = "English",

volume = "16",

pages = "3036--3041",

journal = "Chinese Physics",

issn = "1009-1963",

publisher = "IOP Publishing Ltd.",

number = "10",

}

TY - JOUR

T1 - A study on the microwave responses of YBCO and TBCCO thin films by coplanar resonator technique

AU - Shi, Li Bin

AU - Wang, Yun Fei

AU - Ke, Yu Yang

AU - Zhang, Guo Hua

AU - Luo, Sheng

AU - Zhang, Xue Qiang

AU - Li, Chun Guang

AU - Li, Hong

AU - He, Yu Sheng

PY - 2007/10/1

Y1 - 2007/10/1

N2 - YBa2Cu3O7(YBCO) thin films have been prepared by thermal coevaporation on LaAlO3(LAO) substrates, and Tl2Ba2CaCu2O8(TBCCO) thin films are synthesized by magnetron sputtering method on LAO substrates. The transition temperature Tc is90 K for YBCO/LAO and 104 K for TBCCO/LAO. Microwave responses of the films are studied systematically by coplanar resonator technique. Energy gaps of the films obtained are Δ0 = 1.04kBTc for YBCO films and Δ0 = 0.84kBTc for TBCCO films by analysing the temperature dependence of resonant frequencies of coplanar resonator. Penetration depth at 0 K λ0 = 198 nm for YBCO films and λ0 = 200 nm for TBCCO films could also be obtained by using the weak coupling theory and two fluid theory. Results of penetration depth and energy gap confirm the weak coupling properties of the films. In addition, microwave surface resistances Rs of YBCO/LAO and TBCCO/LAO are also investigated by analysing the quality factor and insert loss of the coplanar resonator. Surface resistance of TBCCO/LAO is less than that of YBCO/LAO, so that TBCCO/LAO films may have more potential applications.

AB - YBa2Cu3O7(YBCO) thin films have been prepared by thermal coevaporation on LaAlO3(LAO) substrates, and Tl2Ba2CaCu2O8(TBCCO) thin films are synthesized by magnetron sputtering method on LAO substrates. The transition temperature Tc is90 K for YBCO/LAO and 104 K for TBCCO/LAO. Microwave responses of the films are studied systematically by coplanar resonator technique. Energy gaps of the films obtained are Δ0 = 1.04kBTc for YBCO films and Δ0 = 0.84kBTc for TBCCO films by analysing the temperature dependence of resonant frequencies of coplanar resonator. Penetration depth at 0 K λ0 = 198 nm for YBCO films and λ0 = 200 nm for TBCCO films could also be obtained by using the weak coupling theory and two fluid theory. Results of penetration depth and energy gap confirm the weak coupling properties of the films. In addition, microwave surface resistances Rs of YBCO/LAO and TBCCO/LAO are also investigated by analysing the quality factor and insert loss of the coplanar resonator. Surface resistance of TBCCO/LAO is less than that of YBCO/LAO, so that TBCCO/LAO films may have more potential applications.

KW - Coplanar resonator

KW - Superconducting films

KW - TBCCO

KW - YBCO

UR - http://www.scopus.com/inward/record.url?scp=36749003264&partnerID=8YFLogxK

U2 - 10.1088/1009-1963/16/10/036

DO - 10.1088/1009-1963/16/10/036

M3 - Article

AN - SCOPUS:36749003264

SN - 1009-1963

VL - 16

SP - 3036

EP - 3041

JO - Chinese Physics

JF - Chinese Physics

IS - 10

ER -

A study on the microwave responses of YBCO and TBCCO thin films by coplanar resonator technique

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Keywords

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