Enhancement of critical current density for nano (n)-ZnO doped MgB 2 superconductor

Intikhab A. Ansari; M. Shahabuddin; Nasser S. Alzayed; Khalil A. Ziq; A. F. Salem; V. P.S. Awana; H. Kishan

doi:10.1016/j.physc.2013.10.001

Enhancement of critical current density for nano (n)-ZnO doped MgB ₂ superconductor

Intikhab A. Ansari^*
, M. Shahabuddin
, Nasser S. Alzayed
, Khalil A. Ziq
, A. F. Salem
, V. P.S. Awana
, H. Kishan

^*Corresponding author for this work

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

7 Scopus citations

Abstract

Doping effect of ZnO-nanoparticles on the superconducting properties of MgB₂ has been studied. The 2% nano-ZnO doped MgB₂ shows the excellent J_c and H_irr at all temperatures and magnetic fields amongst the doped and undoped sample. The lattice parameter-c shows the higher value for 2% ZnO doped MgB₂ sample, which clearly demonstrates the presence of the lattice strain in doped samples. The residual resistivity ratio was increased as the nano-ZnO doping level increased. Very slight variation in T_c is observed from the temperature dependence of resistivity plot of nano-ZnO doped MgB₂. In M (H) plot at low applied fields, we have observed large vortex instabilities (vortex-avalanches) associated with 2% and 4% doped samples. Vortex avalanche effect is diminishes with increasing temperature and disappears near 15 K. The results are discussed in terms of local-vortex instabilities caused by doping of ZnO nanoparticles. Scanning electron microscopy studies show that the synthesized samples are well adherent and grains are uniformly distributed with an average particle size of ∼5-10 μm.

Original language	English
Pages (from-to)	208-212
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	495
DOIs	https://doi.org/10.1016/j.physc.2013.10.001
State	Published - 2013

Bibliographical note

Funding Information:
This work was supported by NPST program by King Saud University, Riyadh, Project Number 08-ADV397-2.

Keywords

Critical current density
Magnetization
Residual resistivity ratio
Vortex-avalanches

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/j.physc.2013.10.001

Cite this

@article{195cd055d2a64745b6b43c9792895ece,

title = "Enhancement of critical current density for nano (n)-ZnO doped MgB 2 superconductor",

abstract = "Doping effect of ZnO-nanoparticles on the superconducting properties of MgB2 has been studied. The 2\% nano-ZnO doped MgB2 shows the excellent Jc and Hirr at all temperatures and magnetic fields amongst the doped and undoped sample. The lattice parameter-c shows the higher value for 2\% ZnO doped MgB2 sample, which clearly demonstrates the presence of the lattice strain in doped samples. The residual resistivity ratio was increased as the nano-ZnO doping level increased. Very slight variation in Tc is observed from the temperature dependence of resistivity plot of nano-ZnO doped MgB2. In M (H) plot at low applied fields, we have observed large vortex instabilities (vortex-avalanches) associated with 2\% and 4\% doped samples. Vortex avalanche effect is diminishes with increasing temperature and disappears near 15 K. The results are discussed in terms of local-vortex instabilities caused by doping of ZnO nanoparticles. Scanning electron microscopy studies show that the synthesized samples are well adherent and grains are uniformly distributed with an average particle size of ∼5-10 μm.",

keywords = "Critical current density, Magnetization, Residual resistivity ratio, Vortex-avalanches",

author = "Ansari, \{Intikhab A.\} and M. Shahabuddin and Alzayed, \{Nasser S.\} and Ziq, \{Khalil A.\} and Salem, \{A. F.\} and Awana, \{V. P.S.\} and H. Kishan",

note = "Funding Information: This work was supported by NPST program by King Saud University, Riyadh, Project Number 08-ADV397-2.",

year = "2013",

doi = "10.1016/j.physc.2013.10.001",

language = "English",

volume = "495",

pages = "208--212",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Enhancement of critical current density for nano (n)-ZnO doped MgB 2 superconductor

AU - Ansari, Intikhab A.

AU - Shahabuddin, M.

AU - Alzayed, Nasser S.

AU - Ziq, Khalil A.

AU - Salem, A. F.

AU - Awana, V. P.S.

AU - Kishan, H.

N1 - Funding Information: This work was supported by NPST program by King Saud University, Riyadh, Project Number 08-ADV397-2.

PY - 2013

Y1 - 2013

N2 - Doping effect of ZnO-nanoparticles on the superconducting properties of MgB2 has been studied. The 2% nano-ZnO doped MgB2 shows the excellent Jc and Hirr at all temperatures and magnetic fields amongst the doped and undoped sample. The lattice parameter-c shows the higher value for 2% ZnO doped MgB2 sample, which clearly demonstrates the presence of the lattice strain in doped samples. The residual resistivity ratio was increased as the nano-ZnO doping level increased. Very slight variation in Tc is observed from the temperature dependence of resistivity plot of nano-ZnO doped MgB2. In M (H) plot at low applied fields, we have observed large vortex instabilities (vortex-avalanches) associated with 2% and 4% doped samples. Vortex avalanche effect is diminishes with increasing temperature and disappears near 15 K. The results are discussed in terms of local-vortex instabilities caused by doping of ZnO nanoparticles. Scanning electron microscopy studies show that the synthesized samples are well adherent and grains are uniformly distributed with an average particle size of ∼5-10 μm.

AB - Doping effect of ZnO-nanoparticles on the superconducting properties of MgB2 has been studied. The 2% nano-ZnO doped MgB2 shows the excellent Jc and Hirr at all temperatures and magnetic fields amongst the doped and undoped sample. The lattice parameter-c shows the higher value for 2% ZnO doped MgB2 sample, which clearly demonstrates the presence of the lattice strain in doped samples. The residual resistivity ratio was increased as the nano-ZnO doping level increased. Very slight variation in Tc is observed from the temperature dependence of resistivity plot of nano-ZnO doped MgB2. In M (H) plot at low applied fields, we have observed large vortex instabilities (vortex-avalanches) associated with 2% and 4% doped samples. Vortex avalanche effect is diminishes with increasing temperature and disappears near 15 K. The results are discussed in terms of local-vortex instabilities caused by doping of ZnO nanoparticles. Scanning electron microscopy studies show that the synthesized samples are well adherent and grains are uniformly distributed with an average particle size of ∼5-10 μm.

KW - Critical current density

KW - Magnetization

KW - Residual resistivity ratio

KW - Vortex-avalanches

UR - https://www.scopus.com/pages/publications/84886196709

U2 - 10.1016/j.physc.2013.10.001

DO - 10.1016/j.physc.2013.10.001

M3 - Article

AN - SCOPUS:84886196709

SN - 0921-4534

VL - 495

SP - 208

EP - 212

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

ER -