skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Double-sided Tl{sub 2}Ba{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10} thin films based high temperature superconducting filter operating above 100 K

Abstract

A high temperature superconducting (HTS) filter on double-sided Tl{sub 2}Ba{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10} (Tl-2223) thin films is designed in this letter. High-quality double-sided Tl-2223 thin films are prepared on 10 × 10 × 0.5 mm{sup 3} LaAlO{sub 3} (001) substrate. The critical temperatures T{sub c} of the films are 120 ± 1 K and the critical current densities J{sub c} are 3–4 MA/cm{sup 2} at 77 K for both sides. X-ray diffraction θ-2θ scans and rotational ϕ-scans prove that the films are strongly textured with the c axis perpendicular to the substrate surface. A 3-pole band-pass filter is then fabricated on the Tl-2223 thin films with 4% relative bandwidth and a center frequency of 4.0 GHz. At 77 K, 100 K, and 102 K, the insertion loss in the passband is 0.088 dB, 0.21 dB, and 0.27 dB, respectively. These performances show that the proposed HTS filter is satisfying even when the operating temperature is above 100 K, which makes it possible to work in outer space without cryogenic systems.

Authors:
; ; ; ; ; ; ; ; ; ;  [1]
  1. College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071 (China)
Publication Date:
OSTI Identifier:
22311029
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BARIUM COMPOUNDS; CALCIUM COMPOUNDS; CRITICAL CURRENT; CRITICAL TEMPERATURE; CUPRATES; CURRENT DENSITY; FILTERS; HIGH-TC SUPERCONDUCTORS; LANTHANUM COMPOUNDS; SUBSTRATES; SURFACES; TEMPERATURE RANGE 0065-0273 K; THALLIUM COMPOUNDS; THIN FILMS; X-RAY DIFFRACTION

Citation Formats

Xie, Wei, Wang, Pei, He, Ming, E-mail: heming@nankai.edu.cn, Qiao, Ren, Du, Jia-Nan, Gao, Xiao-Xin, Liu, Xin, Zhang, Xu, Ji, Lu, Chen, Hai-Hua, and Zhao, Xin-Jie, E-mail: zhaoxj@nankai.edu.cn. Double-sided Tl{sub 2}Ba{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10} thin films based high temperature superconducting filter operating above 100 K. United States: N. p., 2014. Web. doi:10.1063/1.4894735.
Xie, Wei, Wang, Pei, He, Ming, E-mail: heming@nankai.edu.cn, Qiao, Ren, Du, Jia-Nan, Gao, Xiao-Xin, Liu, Xin, Zhang, Xu, Ji, Lu, Chen, Hai-Hua, & Zhao, Xin-Jie, E-mail: zhaoxj@nankai.edu.cn. Double-sided Tl{sub 2}Ba{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10} thin films based high temperature superconducting filter operating above 100 K. United States. doi:10.1063/1.4894735.
Xie, Wei, Wang, Pei, He, Ming, E-mail: heming@nankai.edu.cn, Qiao, Ren, Du, Jia-Nan, Gao, Xiao-Xin, Liu, Xin, Zhang, Xu, Ji, Lu, Chen, Hai-Hua, and Zhao, Xin-Jie, E-mail: zhaoxj@nankai.edu.cn. Mon . "Double-sided Tl{sub 2}Ba{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10} thin films based high temperature superconducting filter operating above 100 K". United States. doi:10.1063/1.4894735.
@article{osti_22311029,
title = {Double-sided Tl{sub 2}Ba{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10} thin films based high temperature superconducting filter operating above 100 K},
author = {Xie, Wei and Wang, Pei and He, Ming, E-mail: heming@nankai.edu.cn and Qiao, Ren and Du, Jia-Nan and Gao, Xiao-Xin and Liu, Xin and Zhang, Xu and Ji, Lu and Chen, Hai-Hua and Zhao, Xin-Jie, E-mail: zhaoxj@nankai.edu.cn},
abstractNote = {A high temperature superconducting (HTS) filter on double-sided Tl{sub 2}Ba{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10} (Tl-2223) thin films is designed in this letter. High-quality double-sided Tl-2223 thin films are prepared on 10 × 10 × 0.5 mm{sup 3} LaAlO{sub 3} (001) substrate. The critical temperatures T{sub c} of the films are 120 ± 1 K and the critical current densities J{sub c} are 3–4 MA/cm{sup 2} at 77 K for both sides. X-ray diffraction θ-2θ scans and rotational ϕ-scans prove that the films are strongly textured with the c axis perpendicular to the substrate surface. A 3-pole band-pass filter is then fabricated on the Tl-2223 thin films with 4% relative bandwidth and a center frequency of 4.0 GHz. At 77 K, 100 K, and 102 K, the insertion loss in the passband is 0.088 dB, 0.21 dB, and 0.27 dB, respectively. These performances show that the proposed HTS filter is satisfying even when the operating temperature is above 100 K, which makes it possible to work in outer space without cryogenic systems.},
doi = {10.1063/1.4894735},
journal = {Applied Physics Letters},
number = 9,
volume = 105,
place = {United States},
year = {Mon Sep 01 00:00:00 EDT 2014},
month = {Mon Sep 01 00:00:00 EDT 2014}
}
  • Using a cryogenic diamond anvil cell (DAC) the pressure dependence of the superconducting transition temperature {ital T}{sub {ital c}} of Tl{sub 2}Ba{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10+{ital y}} (Tl-2223) and Tl{sub 2}Ba{sub 2}Ca{sub 3}Cu{sub 4}O{sub 12+{ital y}} (Tl-2234) has been measured resistively up to 21 GPa. At ambient pressure these compounds have {ital T}{sub {ital c}}{close_quote}s of 128.5 K and 113 K. At low pressures, the pressure dependence {partial_derivative}{ital T}{sub {ital c}}/{partial_derivative}{ital p} is 1.75 K/GPa in Tl-2223 and 2.0 K/GPa in Tl-2234. As pressure is increased {ital T}{sub {ital c}} continues to increase (although the rate diminishes) until {ital T}{submore » {ital c}} reaches a maximum of 133 K at 4.2 GPa in Tl-2223 and of 120 K at 6.6 GPa in Tl-2234. At higher pressures {ital T}{sub {ital c}} decreases. In this region a rather abrupt change in {partial_derivative}{ital T}{sub {ital c}}/{partial_derivative}{ital p} is observed at {ital p}{sub {ital c}}=12.0 GPa in Tl-2223 and at {ital p}{sub {ital c}}=10.5 GPa in Tl-2234. The kink at {ital p}{sub {ital c}} is interpreted as an indication of the presence of {ital inequivalent} CuO{sub 2} layers: Below {ital p}{sub {ital c}} the {ital T}{sub {ital c}} of the samples is determined by the intrinsic {ital T}{sub {ital c}} of the outer CuO{sub 2} layers while above {ital p}{sub {ital c}} it is determined by that of the inner CuO{sub 2} layers. {copyright} {ital 1996 The American Physical Society.}« less
  • We discuss the electronic structure of the first four members of the high-T/sub c/ superconductor family Tl/sub 2/Ba/sub 2/Ca/sub L//sub -1/Cu/sub L/O/sub 4+2//sub L/, where L is the number of CuO/sub 2/ layers. Using a simplified BCS-type model, we relate T/sub c/ to L using the partial density of states of the CuO/sub 2/ layers as the physical link. According to our model, the pure phase of Tl/sub 2/Ba/sub 2/Ca/sub 3/Cu/sub 4/O/sub 12/ (L = 4) would have a value of T/sub c/ in the range 135 to 165 K.
  • Epitaxial Tl{sub 2}Ca{sub 2}Ba{sub 2}Cu{sub 3}O{sub 10} films on (100) LaAlO{sub 3} are prepared by post-annealing 2Tl:2Ca:2Ba:3Cu precursor films at 830--860 {degree}C in {congruent}0.03--0.15 atm of O{sub 2}. These films (0.2--1.1 {mu}m thickness) are smooth and shiny to the eye, and have a sharp zero resistance and onset diamagnetic transition temperature of 117--121 K. Transport critical current densities of 1.6{times}10{sup 6} A/cm{sup 2} at 77 K and {congruent}10{sup 5} A/cm{sup 2} at 100 K are obtained for a 0.38-{mu}m-thick film in magnetic fields up to 100 Oe. Strong flux pinning at low temperatures is inferred from the weak-field dependence ofmore » the critical current density calculated from magnetic hysteresis loops. At 5 K, the best film has a magnetic critical current density of 9{times}10{sup 6} A/cm{sup 2} in zero field, decreasing gradually to 1.5{times}10{sup 6} A/cm{sup 2} in a 5-T field.« less
  • Highly {ital c}-axis-oriented Tl{sub 2}Ba{sub 2}Ca{sub 2}Cu{sub 3}O{sub {ital x}} superconducting thin films with the critical current density as high as 1{times}10{sup 7} A/cm{sup 2} at 87 K were obtained by single-target dc sputtering on LaAlO{sub 3}(100) substrates followed by encapsulated compensate annealing. The strong linear temperature dependence of zero-field critical current at low temperatures suggests a creep-dominated behavior. Preliminary field dependence studies on the critical current density in low-field regime ({lt}2 kOe) shows no evidence of hysteresis commonly encountered in films with higher granularity. The scaling behavior of the global pinning force density exhibits strong resemblance to conventional type-IImore » superconductors with the pinning force density of the same order of magnitude as that in strong pinned NbN thin films.« less
  • Using a roller technique, Ba{sub 2}Ca{sub 2}Cu{sub 3}O{sub x} thick film precursors (about 100 microns in thickness) were prepared. These films were then treated by a vapor process using Tl{sub 2}O{sub 3} to form superconducting Tl-Ba-Ca-Cu-O films. The superconducting onset temperature of this film is about 120 K with a zero-resistance temperature ranging from 91K to 111K. X-ray SEM, and electron microprobe analyses of these films are presented, and, on the basis of these analyses, crystallite growth are discussed.