Direct measurements of the penetration depth in a superconducting film using magnetic force microscopy

Details Direct measurements of the penetration depth in a superconducting film using magnetic force microscopy Direct measurements of the penetration depth in a superconducting film using magnetic force microscopy

2009-09-07

arxiv.org/abs/0909.1360v1

Appl. Phys. Lett., 95, 262502 (2009)

Physics

Condensed Matter

Materials Science

3 pages, 4 figures, submitted to APL on 08/18/09

Scientific paper

10.1063/1.3276563

We report the local measurements of the magnetic penetration depth $\lambda$ in a superconducting Nb film using magnetic force microscopy (MFM). We developed a method for quantitative extraction of the penetration depth from single-parameter simultaneous fits to the lateral and height profiles of the MFM signal, and demonstrate that the obtained value is in excellent agreement with that obtained from the bulk magnetization measurements.

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