Superconducting properties of Zn and Al double-doped Mg1-x(Zn0.5Al0.5)xB2

G.J. Xu; Jean-Claude Grivel; A.B. Abrahamsen; X.P. Chen; N.H. Andersen

doi:10.1016/j.physc.2003.12.016

Superconducting properties of Zn and Al double-doped Mg₁_-_x(Zn₀_.₅Al₀_.₅)_xB₂

G.J. Xu, Jean-Claude Grivel, A.B. Abrahamsen, X.P. Chen, N.H. Andersen

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

A series of polycrystalline samples of Mg1-x(Zn0.5Al0.5)(x)B-2 (0less than or equal toxless than or equal to0.8) were prepared by solid state reaction method and their structure, superconducting transition temperature (T-c) and transport properties were investigated by means of X-ray diffraction (XRD), ac susceptibility, magnetization and resistivity. The double doping leads to decreases in both the lattice parameters a and c, and the T-c decreases with increasing dopant content. A systematical comparison with Al doped- and Li, Al double doped MgB2 of structure, superconducting transition and critical current density (J(c)) is made. It is suggested that the chemical pressure effect plays a more important role influencing the normal state transport and T-c than the change of carrier concentration, and the introduction of disorder into the Mg layers shows little influence improving the irreversibility field and J(c). (C) 2004 Elsevier B.V. All rights reserved.

Original language	English
Journal	Physica C: Superconductivity and its Applications
Volume	403
Issue number	3
Pages (from-to)	113-118
ISSN	0921-4534
DOIs	https://doi.org/10.1016/j.physc.2003.12.016
Publication status	Published - 2004

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title = "Superconducting properties of Zn and Al double-doped Mg1-x(Zn0.5Al0.5)xB2",

abstract = "A series of polycrystalline samples of Mg1-x(Zn0.5Al0.5)(x)B-2 (0less than or equal toxless than or equal to0.8) were prepared by solid state reaction method and their structure, superconducting transition temperature (T-c) and transport properties were investigated by means of X-ray diffraction (XRD), ac susceptibility, magnetization and resistivity. The double doping leads to decreases in both the lattice parameters a and c, and the T-c decreases with increasing dopant content. A systematical comparison with Al doped- and Li, Al double doped MgB2 of structure, superconducting transition and critical current density (J(c)) is made. It is suggested that the chemical pressure effect plays a more important role influencing the normal state transport and T-c than the change of carrier concentration, and the introduction of disorder into the Mg layers shows little influence improving the irreversibility field and J(c). (C) 2004 Elsevier B.V. All rights reserved. ",

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T1 - Superconducting properties of Zn and Al double-doped Mg1-x(Zn0.5Al0.5)xB2

AU - Xu, G.J.

AU - Grivel, Jean-Claude

AU - Abrahamsen, A.B.

AU - Chen, X.P.

AU - Andersen, N.H.

PY - 2004

Y1 - 2004

N2 - A series of polycrystalline samples of Mg1-x(Zn0.5Al0.5)(x)B-2 (0less than or equal toxless than or equal to0.8) were prepared by solid state reaction method and their structure, superconducting transition temperature (T-c) and transport properties were investigated by means of X-ray diffraction (XRD), ac susceptibility, magnetization and resistivity. The double doping leads to decreases in both the lattice parameters a and c, and the T-c decreases with increasing dopant content. A systematical comparison with Al doped- and Li, Al double doped MgB2 of structure, superconducting transition and critical current density (J(c)) is made. It is suggested that the chemical pressure effect plays a more important role influencing the normal state transport and T-c than the change of carrier concentration, and the introduction of disorder into the Mg layers shows little influence improving the irreversibility field and J(c). (C) 2004 Elsevier B.V. All rights reserved.

AB - A series of polycrystalline samples of Mg1-x(Zn0.5Al0.5)(x)B-2 (0less than or equal toxless than or equal to0.8) were prepared by solid state reaction method and their structure, superconducting transition temperature (T-c) and transport properties were investigated by means of X-ray diffraction (XRD), ac susceptibility, magnetization and resistivity. The double doping leads to decreases in both the lattice parameters a and c, and the T-c decreases with increasing dopant content. A systematical comparison with Al doped- and Li, Al double doped MgB2 of structure, superconducting transition and critical current density (J(c)) is made. It is suggested that the chemical pressure effect plays a more important role influencing the normal state transport and T-c than the change of carrier concentration, and the introduction of disorder into the Mg layers shows little influence improving the irreversibility field and J(c). (C) 2004 Elsevier B.V. All rights reserved.

KW - 5-I nano

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DO - 10.1016/j.physc.2003.12.016

M3 - Journal article

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JO - Physica C: Superconductivity and its Applications

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