Characterisation of Al defects in SmBa2Cu3-xAlxO6+δ superconductor

M. Scavini; L. Mollica; R. Bianchi; G. A. Costa; M. Ferretti; P. Mele; A. Ubaldini; P. Ghigna; L. Malavasi; P. Mustarelli

doi:10.1142/s0217979203016856

Characterisation of Al defects in SmBa₂Cu_3-xAl_xO_6+δ superconductor

M. Scavini, L. Mollica, R. Bianchi, G. A. Costa, M. Ferretti, P. Mele, A. Ubaldini, P. Ghigna, L. Malavasi, P. Mustarelli

研究成果: Article › 査読

3 被引用数 (Scopus)

抄録

We present here a study on the effect of Al doping on the structure of SmBa₂Cu_3-xAl_xO_6+δ (Sm-123) superconductor. Electron MicroProbe Analysis (EMPA) and X-Ray Powder Diffraction (XRPD) have revealed that the limit of aluminium solubility x is between 0.5 and 0.6. For further doping BaAl₂O₄ appears besides the superconducting phase. XRPD analysis on samples annealed in both oxidising and reducing conditions have revealed that the Al doping inhibits the tetragonal to orthorhombic phase transition. Nuclear Magnetic Resonance (NMR) analysis has shown that almost all the Al ions are coordinated tetrahedrally. The comparison between oxygen non-stoichiometry in pure and Al doped SmBa₂Cu_3-xAl_xO_6+δ suggests that the Al ions are ordered in clusters. A model is proposed for short-range order around Al doping ions which allows us to interpret the phase transition inhibition.

本文言語	English
ページ（範囲）	936-941
ページ数	6
ジャーナル	International Journal of Modern Physics B
巻	17
号	4-6 II
DOI	https://doi.org/10.1142/s0217979203016856
出版ステータス	Published - 2003 3月 10
外部発表	はい

ASJC Scopus subject areas

統計物理学および非線形物理学
凝縮系物理学

文献へのアクセス

10.1142/s0217979203016856

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引用スタイル

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abstract = "We present here a study on the effect of Al doping on the structure of SmBa2Cu3-xAlxO6+δ (Sm-123) superconductor. Electron MicroProbe Analysis (EMPA) and X-Ray Powder Diffraction (XRPD) have revealed that the limit of aluminium solubility x is between 0.5 and 0.6. For further doping BaAl2O4 appears besides the superconducting phase. XRPD analysis on samples annealed in both oxidising and reducing conditions have revealed that the Al doping inhibits the tetragonal to orthorhombic phase transition. Nuclear Magnetic Resonance (NMR) analysis has shown that almost all the Al ions are coordinated tetrahedrally. The comparison between oxygen non-stoichiometry in pure and Al doped SmBa2Cu3-xAlxO6+δ suggests that the Al ions are ordered in clusters. A model is proposed for short-range order around Al doping ions which allows us to interpret the phase transition inhibition.",

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AU - Scavini, M.

AU - Mollica, L.

AU - Bianchi, R.

AU - Costa, G. A.

AU - Ferretti, M.

AU - Mele, P.

AU - Ubaldini, A.

AU - Ghigna, P.

AU - Malavasi, L.

AU - Mustarelli, P.

PY - 2003/3/10

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