Pinning Force Scaling Analysis of Polycrystalline MgB2

M. R. Koblischka; A. Wiederhold; A. Koblischka-Veneva; C. Chang

doi:10.1007/s10948-020-05456-8

Pinning Force Scaling Analysis of Polycrystalline MgB₂

M. R. Koblischka, A. Wiederhold, A. Koblischka-Veneva, C. Chang

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

2 Citations (Scopus)

Abstract

Flux pinning force scaling f= F_p/ F_p_,_max vs. h = H_a/H_irr was performed on a variety of pure MgB₂ samples, including a spark plasma sintered (SPS) one and a series of samples sintered at various reaction temperatures ranging between 775 and 950 ^∘C. The SPS sample exhibits a well-developed scaling at all temperatures, and also the sintered samples prepared at 950 ^∘C; however, the obtained peak positions of the pinning force scalings are distinctly different: The SPS sample reveals dominating pinning at grain boundaries, whereas the dominating pinning for the other one is point-pinning. All other samples studied reveal an apparent non-scaling of the pinning forces. The obtained pinning parameters are discussed in the framework of the Dew–Hughes’ pinning force scaling approach.

Original language	English
Pages (from-to)	3333-3339
Number of pages	7
Journal	Journal of Superconductivity and Novel Magnetism
Volume	33
Issue number	11
DOIs	https://doi.org/10.1007/s10948-020-05456-8
Publication status	Published - 2020 Nov 1
Externally published	Yes

Keywords

Core pinning
Flux pinning forces
Grain boundary pinning
MgB
Scaling of flux pinning forces

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1007/s10948-020-05456-8

Cite this

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title = "Pinning Force Scaling Analysis of Polycrystalline MgB2",

abstract = "Flux pinning force scaling f= Fp/ Fp,max vs. h = Ha/Hirr was performed on a variety of pure MgB2 samples, including a spark plasma sintered (SPS) one and a series of samples sintered at various reaction temperatures ranging between 775 and 950 ∘C. The SPS sample exhibits a well-developed scaling at all temperatures, and also the sintered samples prepared at 950 ∘C; however, the obtained peak positions of the pinning force scalings are distinctly different: The SPS sample reveals dominating pinning at grain boundaries, whereas the dominating pinning for the other one is point-pinning. All other samples studied reveal an apparent non-scaling of the pinning forces. The obtained pinning parameters are discussed in the framework of the Dew–Hughes{\textquoteright} pinning force scaling approach.",

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AU - Koblischka, M. R.

AU - Wiederhold, A.

AU - Koblischka-Veneva, A.

AU - Chang, C.

PY - 2020/11/1

Y1 - 2020/11/1

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