Direct visualization of iron sheath shielding effect in MgB_2 superconducting wires

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dc.creatorPan, Alexey V.
dc.creatorZhou, Sihai
dc.creatorDou, Shi Xue
dc.creatorLiu, Hua Kun
dc.date2002-05-13
dc.date2003-06-03
dc.date.accessioned2026-07-07T02:45:26Z
dc.date.available2026-07-07T02:45:26Z
dc.descriptionLocal magneto-optical imaging and global magnetization measurement techniques were used in order to visualize shielding effects in the superconducting core of MgB_2 wires sheathed by ferromagnetic iron (Fe). The magnetic shielding can provide a Meissner-like state in the superconducting core in applied magnetic fields up to ~1T. The maximum shielding fields are shown to correlate with the saturation fields of magnetization in Fe-sheaths. The shielding has been found to facilitate the appearance of an overcritical state, which is capable of achieving a critical current density (J_c) in the core which is larger than J_c in the same wire without the sheath by a factor of ~2. Other effects caused by the magnetic interaction between the sheath and the superconducting core are discussed.
dc.description4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0205253
dc.identifierhttp://arxiv.org/abs/cond-mat/0205253
dc.identifierSupercond. Sci. Technol. 16, L33-L36 (2003)
dc.identifierdoi:10.1088/0953-2048/16/10/101
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/19297
dc.subjectSuperconductivity
dc.titleDirect visualization of iron sheath shielding effect in MgB_2 superconducting wires
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