Paramagnetic Meissner effect in Nb disks
نویسندگان
چکیده
منابع مشابه
Paramagnetic Meissner Eeect in Conventional Nb Superconductors
The paramagnetic Meissner eeect (PME), in which the eld-cooled-magnetization (FCM) of superconducting samples is positive below the super-conducting transition temperature T c , has been observed in certain ceramic and single-crystal samples of the high-T c cuprate superconductors and more recently in disk-shaped Nb samples. Through systematic investigations of the conditions for observing the ...
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Superconductors, ideally diamagnetic when in the Meissner state, can also exhibit paramagnetic behavior due to trapped magnetic flux. In the absence of pinning such paramagnetic response is weak, and ceases with increasing sample thickness. Here we show that in multiband superconductors paramagnetic response can be observed even in slab geometries, and can be far larger than any previous estima...
متن کاملDetailed investigation of the superconducting transition of niobium disks exhibiting the paramagnetic Meissner effect
Detailed investigation of the superconducting transition of niobium disks exhibiting the paramagnetic Meissner effect. Abstract The superconducting transition region in a Nb disk showing the para-magnetic Meissner effect (PME) has been investigated in detail. From the field-cooled magnetization behavior, two well-defined temperatures can be associated with the appearance of the PME: T 1 (< T c)...
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The Meissner effect and the Spin Meissner effect are the spontaneous generation of charge and spin current respectively near the surface of a metal, making a transition to the superconducting state. The Meissner effect is well known but, I argue, not explained by the conventional theory; the Spin Meissner effect has yet to be detected. I propose that both effects take place in all superconducto...
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In this work we report on systematic field-cooled magnetization experiments in melt-textured YBa2Cu3O7−δ samples containing Y211 precipitates. Magnetic fields up to 14 T were applied either parallel or perpendicular to the ab planes and a strong paramagnetic response related to the superconducting state was observed. This effect is known as paramagnetic Meissner effect (PME). The magnitude of t...
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ژورنال
عنوان ژورنال: Physica C: Superconductivity
سال: 2000
ISSN: 0921-4534
DOI: 10.1016/s0921-4534(00)00991-6