| Autor: |
Makoto Kambara, Yuh Shiohara, Kiyoshi Murata, Takateru Umeda, Kouichi Miyake |
| Rok vydání: |
1998 |
| Předmět: |
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| Zdroj: |
Advances in Superconductivity X ISBN: 9784431668817 |
| Popis: |
Crystal growth of the melt-textured bulk Nd1+x Ba2-x Cu3O6+d (Nd123) crystals were investigated in air When initial compositions were changed from the usual composition of the RE123- Nd4Ba2Cu2O10(Nd422) quasibinary section to the Ba enriched one. Similar to the single crystal growth, bulk Nd123 crystals with a substitution content of about 0.02 were produced at around 1060°C for the initial composition with BaO/CuO ≈ 3/4. It was noted that the growth rates (R) of both in the a- and c-directions decreased as the BaO/CuO ratio became higher. Another unique finding includes decrease of particle size of the Nd422 phase with increasing the BaO/CuO ratio. Despite the smaller R of the Ba-enriched samples, homogeneous dispersion of the smaller Nd422 phase particles could be introduced in the Nd123 grown crystals. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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