NDLI: Scaling of Pinning Force Density in (Bi,Pb)-2223 Added MgB$

Content Provider	Springer Nature Link
Author	Tripathi, D. Dey, T. K.
Copyright Year	2015
Abstract	Addition of different amount of superconducting Bi$_{1.8}$Pb$_{0.26}$Sr$_{2}$Ca$_{2}$Cu$_{3}$ O $_{10+x }$ on the superconducting properties of polycrystalline MgB$_{2}$ is investigated. Samples are synthesized using solid-state reaction under argon atmosphere at 775 $^{∘}$C. X-ray diffraction (XRD) data shows that major reflection belongs to MgB$_{2}$ phase along with small amount of MgO. Traces of 2223 phase are seen for MgB$_{2}$ with higher content of 2223. Absence of significant change in peak positions and in lattice parameters indicates no substitution effect in the present system. Unreacted 2223 phase is present as isolated grains, or clusters at the grain boundaries. The superconducting transition temperature for MgB$_{2}$ is only marginally influenced with the addition of 2223. Field dependence of critical current density (J $_{ c }$), however, displays significant enhancement (∼ 2 times) for 1 wt % 2223 added MgB$_{2}$ pellets. The field dependence of J $_{ c }$ is explained well using collective pinning model. Further, the pinning force density of both pure and 2223 added MgB$_{2}$ displays excellent scaling with respect to the field (h $_{ n }$), corresponding to which F $_{ p }$ drops to half of its maximum value. The observed scaling of normalized pinning force density (F $_{ p }$/ F $_{ p m a x }$) is described well in terms of an expression derived based on J $_{ c }$ expression proposed by collective pinning model in small bundle region.
Starting Page	2025
Ending Page	2032
Page Count	8
File Format	PDF
ISSN	15571939
Journal	Journal of Superconductivity and Novel Magnetism
Volume Number	28
Issue Number	7
e-ISSN	15571947
Language	English
Publisher	Springer US
Publisher Date	2015-03-13
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	(Bi,Pb)-2223 added MgB$_{2}$ Critical current density Pinning force Scaling equation Strongly Correlated Systems, Superconductivity Magnetism, Magnetic Materials Condensed Matter Physics Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Condensed Matter Physics

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