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Nanomagnetism

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Magnetization reversal of nanostructures

Thanks to a home-made in situ magneto-optical experiments, we study the magnetic behavior of model magnetic nanostructures. We are particularly interested in the thermal stability of the magnetization, in nanostructures of pure elements and alloys.

Energy barrier as function of size for the thermal reversal of Co nanodots
Energy barrier as function of size for the thermal reversal of Co nanodots

Spin imaging at the nanoscale

We have developed a spin polarized scanning tunneling microscope that allows us to get images of magnetic domains with atomic resolution. We can therefore study new magnetic structures at this scale.

Magnetic domains on a Cr(001) surface
Magnetic domains on a Cr(001) surface

Few references

Magnetization reversal of nanostructures

- “Interplay between interfacial and structural properties on the magnetism of self-organized core-shell Co/Pt supported nanodots’’, P. Campiglio, N. Moreau, V. Repain, C. Chacon, Y. Girard, J. Klein, J. Lagoute, S. Rousset, H. Bulou, F. Scheurer, C. Goyhenex, P. Ohresser, E. Fonda, H. Magnan, Physical Review B, 84, 235443 (2011).

- “Spin-Wave-Assisted Thermal Reversal of Epitaxial Perpendicular Magnetic Nanodots“, S. Rohart, P. Campiglio, V. Repain, Y. Nahas, C. Chacon, Y. Girard, J. Lagoute, A. Thiaville. S. Rousset, Physical Review Letters, 104, 137202 (2010).

- “Dominant Role of the Epitaxial Strain in the Magnetism of Core-Shell Co/Au Self-Organized Nanodots", Y. Nahas, V. Repain, C. Chacon, Y. Girard, J. Lagoute, G. Rodary, J. Klein, S. Rousset, H. Bulou, C. Goyhenex,
Physical Review Letters, 103, 067202 (2009).

Spin imaging at the nanoscale

- “Spin-polarized scanning tunneling microscopy and spectroscopy study of chromium on a Cr(001) surface”, J. Lagoute, S. L. Kawahara, C. Chacon, V. Repain, Y. Girard, S. Rousset, Journal of Physics : Condensed Matter, 23, 045007 (2011).