TY - JOUR
T1 - Pinning Force Scaling Analysis of Polycrystalline MgB2
AU - Koblischka, M. R.
AU - Wiederhold, A.
AU - Koblischka-Veneva, A.
AU - Chang, C.
N1 - Publisher Copyright:
© 2020, The Author(s).
PY - 2020/11/1
Y1 - 2020/11/1
N2 - 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’ pinning force scaling approach.
AB - 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’ pinning force scaling approach.
KW - Core pinning
KW - Flux pinning forces
KW - Grain boundary pinning
KW - MgB
KW - Scaling of flux pinning forces
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U2 - 10.1007/s10948-020-05456-8
DO - 10.1007/s10948-020-05456-8
M3 - Article
AN - SCOPUS:85088306641
VL - 33
SP - 3333
EP - 3339
JO - Journal of Superconductivity and Novel Magnetism
JF - Journal of Superconductivity and Novel Magnetism
SN - 1557-1939
IS - 11
ER -