NMR Study of Hydrogen in a YBa sub 2 Cu sub 3 O sub 7-- delta Ceramic
It is well documented that H alters the high temperature superconducting properties of yttrium ceramics, and in this context, the physico-chemical state of H added to the ceramic by a treatment with water vapour, has been clarified. Broad line NMR was employed to detect the H, and X-ray diffraction...
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| Veröffentlicht in: | Fizika tverdogo tela 1989-10, Vol.31 (10), p.115-120 |
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| container_title | Fizika tverdogo tela |
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| creator | Egorov, E A Zhizhenkov, V V Baikov, Y U M Kozlova, I R Chudnovskii, F A |
| description | It is well documented that H alters the high temperature superconducting properties of yttrium ceramics, and in this context, the physico-chemical state of H added to the ceramic by a treatment with water vapour, has been clarified. Broad line NMR was employed to detect the H, and X-ray diffraction to record changes in the crystalline lattice. Essentially, it is shown that the H exists in four distinct states, and these have been identified. The total number of protons in 1 g of ceramic is 4.8 x 10 exp 20 , of which > 80% are implanted in the crystalline lattice. NMR spectra of protons, recorded over a wide range of temperatures, provided evidence of the absence of paramagnetism in Cu ions. Graphs. 14 ref.--AA |
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Broad line NMR was employed to detect the H, and X-ray diffraction to record changes in the crystalline lattice. Essentially, it is shown that the H exists in four distinct states, and these have been identified. The total number of protons in 1 g of ceramic is 4.8 x 10 exp 20 , of which > 80% are implanted in the crystalline lattice. NMR spectra of protons, recorded over a wide range of temperatures, provided evidence of the absence of paramagnetism in Cu ions. 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| ispartof | Fizika tverdogo tela, 1989-10, Vol.31 (10), p.115-120 |
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| language | rus |
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| title | NMR Study of Hydrogen in a YBa sub 2 Cu sub 3 O sub 7-- delta Ceramic |
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