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Determining the permeability of magnetic thin film material by magnetic force microscopy: relation with superconducting thin films

✍ Scribed by Artorix de la Cruz de Oña

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
210 KB
Volume
348
Category
Article
ISSN
0921-4526

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✦ Synopsis

A generalized model to recover the magnetic permeability m of linear magnetic medium thin films from magnetic force microscopy (MFM), data under magnetostatic conditions is developed. In the mathematical treatment, where no assumption is made about the symmetry of the stray field, shape or magnetization for the MFM tip, we are lead to an inverse problem by entailing a nonlinear system of equations and obtain from the experimental data both physical magnitudes wanted: the thickness of the film b m and m: On the other hand, relations between superconducting and magnetic thin films are obtained, solving the problem of calibration functions and allowing to recover for a superconducting material the London penetration depth l as well as the film thickness b l :

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