Growth anisotropy in seeded melt growth of YBa2Cu3Ox

Influence of Ag addition on crystallization and microstructure of melt-grown single-grain YBa2Cu3O7bulk superconductors

“…The growth rates in the LGRR and HGRL were determined using a graphical dependence published by Maeda and Shiohara for a composition similar to our study [13] (table 2). Estimated growth rates are in good agreement with the growth rates typical for the Y123 melt-growth [18][19][20]. Moreover, the row spacing should follow a λ Ag 2 R = constant law [17].…”

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

“…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].…”

“…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]. In this work, we have utilized a single-crystallike, single-domain YBCO as an alternative but equally effective material.…”

Real-Time Observation and Analysis of Single-Domain YBCO Bulk Superconductor by TSIG Process

“…In addition, pushing/trapping of the Y211 phase particles at the solidification front of YBCO crystal should be considered during the melt growth process. Donglu Shi et al 13 reported that the growth rate of YBCO crystal is of anisotropy and the growth rate along ab plane(Rab) was larger than that of c axis(Rc); Rab increased from 0.2 to 1.1 mm when the undercooling temperature ΔT increased from 2 to 10 °C;but Rab increased with from 0.3 to 0.44 mm between ΔT of 25 and 40 °C. All the above results are obtained from quenched samples.…”