The Foucault method, one of the classical Lorentz microscopy techniques, is here investigated in order to demonstrate its applicability to in-focus observations of superconducting fluxons. As the deflections involved are of the order of 10(-5)-10(-6) rad, low-angle techniques, high brightness, coherent illumination, and a low aberration magnetic stage are needed. The first experimental results are presented and discussed in relation with a theoretical model for the fluxon which allows the interpretation of the main features of the observed patterns. (C) 1999 American Institute of Physics. [S0021-8979(99)03708-1].
Foucault imaging of superconducting fluxons / Yoshida, T; Endo, J; Harada, K; Kasai, H; Matsuda, T; Kamimura, O; Tonomura, A; Beleggia, M; Patti, R; Pozzi, G. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - 85:8(1999), pp. 4096-4103. [10.1063/1.370317]
Foucault imaging of superconducting fluxons
Beleggia M;
1999
Abstract
The Foucault method, one of the classical Lorentz microscopy techniques, is here investigated in order to demonstrate its applicability to in-focus observations of superconducting fluxons. As the deflections involved are of the order of 10(-5)-10(-6) rad, low-angle techniques, high brightness, coherent illumination, and a low aberration magnetic stage are needed. The first experimental results are presented and discussed in relation with a theoretical model for the fluxon which allows the interpretation of the main features of the observed patterns. (C) 1999 American Institute of Physics. [S0021-8979(99)03708-1].
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