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The effect of Pr~6~O~11~ doping on superconducting properties of MgB~2~ by N. Ojha; V. K. Malik; C. Bernhard; G. D. Varma is a Materials Science article available to read on EtoBox.

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## Abstract In this paper we report the effect of Pr~6~O~11~ doping on the structural and superconducting properties of MgB~2~. The bulk samples of Pr~6~O~11~‐doped MgB~2~ have been prepared with nominal compositions Mg~1−__x__~(Pr~6~O~11~)~__x__/6~B~2~ (where __x__ = 0.0, 0.01, 0.02, 0.03, 0.04, and 0.05) via a standard solid‐state reaction route by sintering in a reducing atmosphere of Ar/H~2~. The superconducting transition temperature __T__~c~ of MgB~2~ is found to decrease from 39 to 37 K when __x__ increases from 0 to 0.05. The XRD results show the presence of MgO and PrB~6~ secondary phases in the doped samples besides the main hexagonal phase of MgB~2~. Improvement in critical current density (__J__~c~), irreversibility field (__H__~irr~), and upper critical field (__H__~c2~) of doped samples has been observed. The __J__~c~ values at 10 and 20 K of the __x__ = 0.03 sample are higher in the entire field region (0–6 T). At 10 K and 2 T field the __J__~c~ values of undoped and 0.03 Pr~6~O~11~‐doped samples are 1.09 × 10^5^ and 2.21 × 10^5^ A/cm^2^, respectively. Variations of __H__~c2~, __J__~c~, __H__~irr~, and flux‐pinning force (__F__~p~) with doping concentrations have bee

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Author

N. Ojha; V. K. Malik; C. Bernhard; G. D. Varma

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley; Wiley - V C H Verlag GmbbH & Co. (ISSN 0031-8965)

Published

2010

Language

EN

Field

Materials Science (Physical Sciences)