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Quantitative magneto-optics of patterned YBa2Cu3O7-d/La1-xSrxMnO3 perovskite bilayers

Roberto Gerbaldo 1Gianluca Ghigo 1Laura Gozzelino 1Francesco Laviano 1Enrica Mezzetti 1Bruno Minetti 1Piotr Przyslupski 2Andrei Tsarou 2Andrzej Wisniewski 2

1. Dipartimento di Fisica, Politecnico di Torino, corso Duca degli Abruzzi, 24, Torino 10129, Italy
2. Polish Academy of Sciences, Institute of Physics, al. Lotników 32/46, Warszawa 02-668, Poland


Magneto-optical imaging of the magnetic field distribution in magnetic and superconductor perovskite heterostructures is presented. The real-time high-resolution imaging of the magnetic field distribution by the magneto-optical technique [1] allows the direct visualization of the local electromagnetic interaction between materials with different electronic orders [2]. We report on new nonlinear calibration and background treatment leading to the quantitative imaging of the local magnetic pattern in the magnetic layer and of the local supercurrent density in the superconducting one, with sub-micrometric resolution. In particular, we present the quantitative measurement of the enhancement/depression of the local superfluid density due to the electronic interaction with the underlying magnetic structure exhibited by the manganite layer.

[1] F. Laviano et al., Supercond. Sci. Technol. 16 (2003) 71.

[2] F. Laviano et al., Appl. Phys. Lett. 86 (2005) 152501.


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Presentation: Poster at E-MRS Fall Meeting 2006, Symposium K, by Laura Gozzelino
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-05-23 21:48
Revised:   2009-06-07 00:44