NiFe alloy particles doping effect of GdaBaaCuaO bulks processed by a new cold-seeding technology

The process of cold seeding melt growth of GdBa2Cu3Oy (Gd123) bulk superconductors using NdBa2Cu3Oy (Nd123) thin films was reported. In addition, a novel cold seeding concept of combining MgO crystal and buffer pellet was also introduced. The misorientation caused by the lattice mismatch between MgO...

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Published in:Transactions of Nonferrous Metals Society of China 2013-07, Vol.23 (7), p.2042-2046
Main Authors: ZHOU, Di-fan, XU, Kun, HARA, Shogo, LI, Bei-zhan, IZUMI, Mitsuru
Format: Article
Language:English
Subjects:
Doping
Intermetallic compounds
Intermetallics
Iron compounds
Melts
Nickel base alloys
Nickel compounds
Nucleation
Pellets
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XU, Kun
HARA, Shogo
LI, Bei-zhan
IZUMI, Mitsuru
description The process of cold seeding melt growth of GdBa2Cu3Oy (Gd123) bulk superconductors using NdBa2Cu3Oy (Nd123) thin films was reported. In addition, a novel cold seeding concept of combining MgO crystal and buffer pellet was also introduced. The misorientation caused by the lattice mismatch between MgO and Gd123 melt was overcome by choosing suitable heat treatment program and Gd2BaCuO5 (Gd211) content of the buffer pellet. The doping effect of soft ferromagnetic NiFe alloy particles was also reported. The bulk sample with 0.4% (mole fraction) doping amount shows the best performance on the flux trapping. The critical current density is largely enhanced under the external field of 1a2 T, which is promising for large-scale applications. This effect is originated from the substitution of Fe and Ni ions for the Cu sites contributing to magnetic flux pinning.
doi_str_mv 10.1016/S1003-6326(13)62694-1
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subjects Doping
Intermetallic compounds
Intermetallics
Iron compounds
Melts
Nickel base alloys
Nickel compounds
Nucleation
Pellets
title NiFe alloy particles doping effect of GdaBaaCuaO bulks processed by a new cold-seeding technology
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