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

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	936-941
Number of pages	6
Journal	International Journal of Modern Physics B
Volume	17
Issue number	4-6 II
DOIs	https://doi.org/10.1142/s0217979203016856
Publication status	Published - 2003 Mar 10
Externally published	Yes

ASJC Scopus subject areas

Statistical and Nonlinear Physics
Condensed Matter Physics

Access to Document

10.1142/s0217979203016856

Cite this

@article{d18ff4e050184b9997615ea898e9536c,

title = "Characterisation of Al defects in SmBa2Cu3-xAlxO6+δ superconductor",

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.",

author = "M. Scavini and L. Mollica and R. Bianchi and Costa, {G. A.} and M. Ferretti and P. Mele and A. Ubaldini and P. Ghigna and L. Malavasi and P. Mustarelli",

year = "2003",

month = mar,

day = "10",

doi = "10.1142/s0217979203016856",

language = "English",

volume = "17",

pages = "936--941",

journal = "International Journal of Modern Physics B",

issn = "0217-9792",

publisher = "World Scientific Publishing Co. Pte Ltd",

number = "4-6 II",

}

TY - JOUR

T1 - Characterisation of Al defects in SmBa2Cu3-xAlxO6+δ superconductor

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

Y1 - 2003/3/10

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0038034462&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0038034462&partnerID=8YFLogxK

U2 - 10.1142/s0217979203016856

DO - 10.1142/s0217979203016856

M3 - Article

AN - SCOPUS:0038034462

SN - 0217-9792

VL - 17

SP - 936

EP - 941

JO - International Journal of Modern Physics B

JF - International Journal of Modern Physics B

IS - 4-6 II

ER -

Characterisation of Al defects in SmBa₂Cu_3-xAl_xO_6+δ superconductor

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this