Inhomogeneous magnetization of a superconducting film measured with a gradiometer

Autor:	H. v. Löhneysen, Wolfgang Freude, Christoph Sürgers, G.-A. Chakam, H. Stalzer, J.-M. Brosi, A. Cosceev
Rok vydání:	2004
Předmět:	Physics Superconductivity Magnetization Physics and Astronomy (miscellaneous) Condensed matter physics Meissner effect Condensed Matter::Superconductivity Diamagnetism Magnetostatics Type-II superconductor Magnetic flux Gradiometer
Zdroj:	Applied Physics Letters. 84:1522-1524
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.1655706
Popis:	The magnetic flux generated by the screening currents of a superconducting Nb film in the Meissner state is measured with a coaxial gradiometer in a weak magnetic field B. A peculiar position dependence is found when the sample surface is only slightly tilted away from the parallel field orientation and shifted with respect to the center axis of the gradiometer. This is due to the inhomogeneous magnetization with a strong out-of-plane contribution measured by the two pick-up coils as confirmed by numerical finite-element calculations. The unusual position dependence has important consequences for interpreting the diamagnetic screening of superconducting films measured by a coaxial gradiometer near the parallel-field orientation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::926d698d30a72760ae09a6e05ac0064b https://doi.org/10.1063/1.1655706 Zobrazit plný text záznamu