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首页> 外文期刊>IEEE Transactions on Applied Superconductivity >Flux pinning scaling behaviors of ultrafine multifilamentary NbTi superconducting wires with Nb island-type artificial pins
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Flux pinning scaling behaviors of ultrafine multifilamentary NbTi superconducting wires with Nb island-type artificial pins

机译：含Nb岛型人工针的超细多丝NbTi超导线材的助焊剂钉扎定标行为

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摘要

In order to engineer composites for high critical current densities Jc, the establishment of an artificial pinning center (APC) composite technique based on the flux pinning mechanism is desired. For that purpose, we investigated temperature and magnetic field scaling behaviors on the flux pinning properties of several kinds of Nb island-type artificial pin wires. The temperature and magnetic field dependence of bulk pinning force densities Fp was evaluated from magnetization curves at 25-7.5K to exclude influences due to external effects such as filament sausaging. As a result it was found that the scaling law holds true in a wide range of temperatures and magnetic fields for all of the APC specimens, which is in contrast to /spl alpha/-Ti specimens. This result suggests that Nb island-type pinning is much stronger than ribbon-like /spl alpha/-Ti pinning.
机译：为了设计用于高临界电流密度Jc的复合材料，需要建立基于磁通钉扎机制的人工钉扎中心（APC）复合技术。为此，我们研究了温度和磁场缩放行为对几种Nb岛型人造针线的磁通钉扎特性的影响。从25-7.5K的磁化曲线评估了整体钉扎力密度Fp的温度和磁场依赖性，以排除由于外部影响（如细丝香肠）而产生的影响。结果发现，与/ spl alpha / -Ti样品相反，所有APC样品的比例定律在很宽的温度和磁场范围内都适用。该结果表明，Nb岛型钉扎比带状/ spl alpha / -Ti钉扎要强得多。

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