ABSENCE OF SUPERCONDUCTIVITY IN THE MIXTURE Y-BA-AG-O
In contrast to earlier reports, we find that the mixture Y-Ba-Ag-O does not form a compound 'YBa2Ag3Ox' in a similar fashion to YBa2Cu3O7 but rather is a combination of Ba-Y-O compounds, silver metal and unreacted starting materials. This mixture shows metallic behaviour, but no supercondu...
| Glavni autori: | , , |
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| Format: | Journal article |
| Jezik: | English |
| Izdano: |
1991
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| _version_ | 1826257334484074496 |
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| author | Singh, K Hunneyball, P Edwards, P |
| author_facet | Singh, K Hunneyball, P Edwards, P |
| author_sort | Singh, K |
| collection | OXFORD |
| description | In contrast to earlier reports, we find that the mixture Y-Ba-Ag-O does not form a compound 'YBa2Ag3Ox' in a similar fashion to YBa2Cu3O7 but rather is a combination of Ba-Y-O compounds, silver metal and unreacted starting materials. This mixture shows metallic behaviour, but no superconductivity down to 5 K. The observed metallic behaviour of these samples is almost certainly due to the presence of elemental silver. Electron probe micro-analysis (EPMA) studies show that silver does not react with Y, Ba and Ba4Y2O7 in an oxygen atmosphere. The importance of conjoint EPMA/EDAX (energy dispersive X-ray spectroscopy) and X-ray powder diffraction (XRD) studies is emphasised. |
| first_indexed | 2024-03-06T18:16:32Z |
| format | Journal article |
| id | oxford-uuid:04ccc733-1d2c-40f4-a0b5-ed7eb00a6c66 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:16:32Z |
| publishDate | 1991 |
| record_format | dspace |
| spelling | oxford-uuid:04ccc733-1d2c-40f4-a0b5-ed7eb00a6c662022-03-26T08:53:44ZABSENCE OF SUPERCONDUCTIVITY IN THE MIXTURE Y-BA-AG-OJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:04ccc733-1d2c-40f4-a0b5-ed7eb00a6c66EnglishSymplectic Elements at Oxford1991Singh, KHunneyball, PEdwards, PIn contrast to earlier reports, we find that the mixture Y-Ba-Ag-O does not form a compound 'YBa2Ag3Ox' in a similar fashion to YBa2Cu3O7 but rather is a combination of Ba-Y-O compounds, silver metal and unreacted starting materials. This mixture shows metallic behaviour, but no superconductivity down to 5 K. The observed metallic behaviour of these samples is almost certainly due to the presence of elemental silver. Electron probe micro-analysis (EPMA) studies show that silver does not react with Y, Ba and Ba4Y2O7 in an oxygen atmosphere. The importance of conjoint EPMA/EDAX (energy dispersive X-ray spectroscopy) and X-ray powder diffraction (XRD) studies is emphasised. |
| spellingShingle | Singh, K Hunneyball, P Edwards, P ABSENCE OF SUPERCONDUCTIVITY IN THE MIXTURE Y-BA-AG-O |
| title | ABSENCE OF SUPERCONDUCTIVITY IN THE MIXTURE Y-BA-AG-O |
| title_full | ABSENCE OF SUPERCONDUCTIVITY IN THE MIXTURE Y-BA-AG-O |
| title_fullStr | ABSENCE OF SUPERCONDUCTIVITY IN THE MIXTURE Y-BA-AG-O |
| title_full_unstemmed | ABSENCE OF SUPERCONDUCTIVITY IN THE MIXTURE Y-BA-AG-O |
| title_short | ABSENCE OF SUPERCONDUCTIVITY IN THE MIXTURE Y-BA-AG-O |
| title_sort | absence of superconductivity in the mixture y ba ag o |
| work_keys_str_mv | AT singhk absenceofsuperconductivityinthemixtureybaago AT hunneyballp absenceofsuperconductivityinthemixtureybaago AT edwardsp absenceofsuperconductivityinthemixtureybaago |