Abstract
Samples were prepared by powder composition method which uses fluoride for annealing and by the method which anneals YBa/sub 2/Cu/sub 3/O/sub x/ in fluorine to elucidate fluorine substitution effects on the superconducting properties of YBa/sub 2/Cu/sub 3/O/sub/x/F/sub/y/. Their structures, magnetic properties and electrical conductivities were investigated. The samples were prepared with the appropriate mixture of BaCO/sub 3/, Y/sub 2/O/sub 3/, CuO, and fluoride such as CuF/sub 2/. Since the samples had strong peaks of BaF/sub 2/ phase together with the perovskite phase in the X-ray diffraction patterns, it was difficult to obtain information on the fluorine substitution effects on the physical properties. Next, the samples were prepared by annealing YBa/sub 2/CuO/sub/x/ sintred pellets and CoF/sub 3/ powder in a sealed quartz tube. In this case, the diffraction patterns showed that the crystalline state of the samples was a single phase of the orthorohombic perovskite structure. The behaviors against the changes in magnetic field and temperature can be considered to be substantially identical. It is hard to consider that the fluorine substitution will play a direct role in attaining higher Tc. (6 figs, 2 refs)
Citation Formats
Yokoyama, Yuko, Okumura, Tomoyuki, Sugise, Ryoji, Matsubara, Toshiya, Koshizuka, Naoki, Hirabayashi, Masayuki, Terada, Norio, and Ihara, Hideo.
Preparation and characterization of Y-Ba-Cu-O-F superconductors.
Japan: N. p.,
1988.
Web.
Yokoyama, Yuko, Okumura, Tomoyuki, Sugise, Ryoji, Matsubara, Toshiya, Koshizuka, Naoki, Hirabayashi, Masayuki, Terada, Norio, & Ihara, Hideo.
Preparation and characterization of Y-Ba-Cu-O-F superconductors.
Japan.
Yokoyama, Yuko, Okumura, Tomoyuki, Sugise, Ryoji, Matsubara, Toshiya, Koshizuka, Naoki, Hirabayashi, Masayuki, Terada, Norio, and Ihara, Hideo.
1988.
"Preparation and characterization of Y-Ba-Cu-O-F superconductors."
Japan.
@misc{etde_7089964,
title = {Preparation and characterization of Y-Ba-Cu-O-F superconductors}
author = {Yokoyama, Yuko, Okumura, Tomoyuki, Sugise, Ryoji, Matsubara, Toshiya, Koshizuka, Naoki, Hirabayashi, Masayuki, Terada, Norio, and Ihara, Hideo}
abstractNote = {Samples were prepared by powder composition method which uses fluoride for annealing and by the method which anneals YBa/sub 2/Cu/sub 3/O/sub x/ in fluorine to elucidate fluorine substitution effects on the superconducting properties of YBa/sub 2/Cu/sub 3/O/sub/x/F/sub/y/. Their structures, magnetic properties and electrical conductivities were investigated. The samples were prepared with the appropriate mixture of BaCO/sub 3/, Y/sub 2/O/sub 3/, CuO, and fluoride such as CuF/sub 2/. Since the samples had strong peaks of BaF/sub 2/ phase together with the perovskite phase in the X-ray diffraction patterns, it was difficult to obtain information on the fluorine substitution effects on the physical properties. Next, the samples were prepared by annealing YBa/sub 2/CuO/sub/x/ sintred pellets and CoF/sub 3/ powder in a sealed quartz tube. In this case, the diffraction patterns showed that the crystalline state of the samples was a single phase of the orthorohombic perovskite structure. The behaviors against the changes in magnetic field and temperature can be considered to be substantially identical. It is hard to consider that the fluorine substitution will play a direct role in attaining higher Tc. (6 figs, 2 refs)}
journal = []
volume = {96:1112}
journal type = {AC}
place = {Japan}
year = {1988}
month = {Apr}
}
title = {Preparation and characterization of Y-Ba-Cu-O-F superconductors}
author = {Yokoyama, Yuko, Okumura, Tomoyuki, Sugise, Ryoji, Matsubara, Toshiya, Koshizuka, Naoki, Hirabayashi, Masayuki, Terada, Norio, and Ihara, Hideo}
abstractNote = {Samples were prepared by powder composition method which uses fluoride for annealing and by the method which anneals YBa/sub 2/Cu/sub 3/O/sub x/ in fluorine to elucidate fluorine substitution effects on the superconducting properties of YBa/sub 2/Cu/sub 3/O/sub/x/F/sub/y/. Their structures, magnetic properties and electrical conductivities were investigated. The samples were prepared with the appropriate mixture of BaCO/sub 3/, Y/sub 2/O/sub 3/, CuO, and fluoride such as CuF/sub 2/. Since the samples had strong peaks of BaF/sub 2/ phase together with the perovskite phase in the X-ray diffraction patterns, it was difficult to obtain information on the fluorine substitution effects on the physical properties. Next, the samples were prepared by annealing YBa/sub 2/CuO/sub/x/ sintred pellets and CoF/sub 3/ powder in a sealed quartz tube. In this case, the diffraction patterns showed that the crystalline state of the samples was a single phase of the orthorohombic perovskite structure. The behaviors against the changes in magnetic field and temperature can be considered to be substantially identical. It is hard to consider that the fluorine substitution will play a direct role in attaining higher Tc. (6 figs, 2 refs)}
journal = []
volume = {96:1112}
journal type = {AC}
place = {Japan}
year = {1988}
month = {Apr}
}