Net-shape processing of single-domain YBa2Cu3Ox for a novel high-Q millimeter wave resonator

Qu, D.; Shi, Donglu; Lu, Shih-Lin; Ferendeci, Altan M.; Mast, David

doi:10.1016/s0921-4534(99)00183-5

Cited by 6 publications

(6 citation statements)

References 16 publications

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“…For a normal conductor such as copper, the surface resistance is of the order of 0.01 at a frequency of 2 GHz [1,2]. The surface resistance is many orders of magnitude below this at the same frequency range in well textured YBCO, making this HTS material an attractive candidate for rf components [4][5][6][7][8][9][10][11][12][13][14][15][16][17]. To achieve low surface resistance, the current approaches in processing HTSs are thin-film technologies, which can produce epitaxially grown films with low surface resistance [4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…To achieve low surface resistance, the current approaches in processing HTSs are thin-film technologies, which can produce epitaxially grown films with low surface resistance [4][5][6][7][8][9][10][11][12][13][14][15][16][17]. In this work, we have utilized a single-crystallike, single-domain YBCO as an alternative but equally effective material.…”

Section: Introductionmentioning

confidence: 99%

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Scaling behaviour of rf surface resistance in oxygen deficient single-domain YBCO

Shi

Ferendeci

et al. 2000

Supercond. Sci. Technol.

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To develop high-quality rf components for wireless telecommunications, we have processed single-domain YBCO of various dimensions and geometry for the device applications including high-Q resonators and filters. In this development, a critical parameter, the surface resistance, R s , of single-domain YBCO has been measured in wide ranges of temperature and magnetic field. We have found that the Pippard model can best describe the well oxygenated crystal, indicating the high-quality of single-domain YBCO. However, such scaling breaks down when the oxygen structural disorders are introduced into the sample. A fundamentally different scaling behaviour is observed, which is closely related to the structural defects of oxygen. We report such a behaviour and discuss the possible underlying mechanism.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Scaling behaviour of rf surface resistance in oxygen deficient single-domain YBCO

Shi

Ferendeci

et al. 2000

Supercond. Sci. Technol.

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“…For the precursor solution, stoichiometric (1:2:3) yttrium trimethylacetate, barium hydroxide and copper trimethylacetate powders were dissolved in a mixed propionic acid/amine solvent with an oxide concentration between 0.1 and 0.5 mol l −1 . The addition of amine was important because [ [10][11][12][13][14]. The YBCO substrates were sectioned from a large single-domain material ceramic that was 20 mm in diameter.…”

Section: Methodsmentioning

confidence: 99%

Interface structure of YBa2Cu3Ox thin films prepared by a non-fluorine sol$ndash$gel route on a single-domain substrate

Shi¹,

Xu²,

Lian³

et al. 2002

Supercond. Sci. Technol.

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In our previous work, we have shown that a single-domain YBa 2 Cu 3 O x (YBCO) exhibits a low surface resistance. However, the second phase Y 2 BaCuO 5 (211) precipitates inevitably as a result of peritectic reaction. These 211 particles are potential sources of RF losses, which need to be eliminated. In this study, a non-fluorine sol-gel synthesis was developed to deposit a YBCO thin film on the surface of single-domain YBCO. The deposited YBCO thin film entirely covered the 211 particles. The interface structure was studied by high-resolution transmission electron microscopy. The experimental results on sol-gel synthesis and thin film characterization are reported. Also discussed is the underlying mechanism of film growth on single-domain YBCO.

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“…However, the thin film's applications maybe limited to small, planar devices. Thick film technology has offered great potential in the development of larger, robust, and three-dimensional designs (3) it is much more economic. Previous studies have focused on identifying the origin of microwave losses [SI.…”

Section: Introductionmentioning

confidence: 99%

Deposition of epitaxial YBCO thin film on single domain YBCO substrate for the development of RF components

Shi

McClellen

et al. 2001

IEEE Trans. Appl. Supercond.

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The current trend of telecommunications has motivated an increasing need for an rfcomponent of threedimensional complex geometry in high-performance devices including tunable receivers, transformers, and inductors. In our previous work we have developed a novel substrateless cavity using single domain YBCO. This cavity resonator has been demonstrated to exhibit a high Q value at the rffrequency. The surface resistance of the single domain YBCO at 77 K has reached a low value of 500 :a, comparable to those of thin films (200 :a). However, in single domain YBCO, the second phase YzBaCuOs (211) is unavoidable in the peritectic reaction, which can, if not well controlled, cause severe dissipative losses. To further reduce the surface resistance, we have deposited an YBCO thin film on the single domain YBCO substrate covering all non-superconducting phases. The YBCO film and the substrate will have the best lattice matching since they are the same species. To study the epitaxial growth mechanisms, we have also deposited the YBCO film on other types of substrates including YSZ. Experimental results on film synthesis, interface structure, and superconducting properties will be reported.

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Net-shape processing of single-domain YBa2Cu3Ox for a novel high-Q millimeter wave resonator

Cited by 6 publications

References 16 publications

Scaling behaviour of rf surface resistance in oxygen deficient single-domain YBCO

Scaling behaviour of rf surface resistance in oxygen deficient single-domain YBCO

Interface structure of YBa2Cu3Ox thin films prepared by a non-fluorine sol$ndash$gel route on a single-domain substrate

Deposition of epitaxial YBCO thin film on single domain YBCO substrate for the development of RF components

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