Magnetic properties of Fe/NiO/Fe(001) trilayers

Biagioni, P.; Brambilla, A.; Portalupi, M.; Rougemaille, N.; Schmid, A. K.; Lanzara, A.; Vavassori, Paolo; Zani, M.; Finazzi, M.; Duo, L.; Ciccacci, F.

doi:10.1016/j.jmmm.2004.11.170

We have investigated the magnetic properties of epitaxially grown Fe/NiO/Fe(0 0 1) trilayers, for different thicknesses of the NiO spacer. Magneto Optical Kerr Effect has been exploited to study the in-plane magnetization reversal processes in the iron layers. We found that the NiO thickness tAFM has a critical value tC for the magnetic coupling between the Fe layers: for tAFM<tC the magnetization directions align perpendicularly, with zero applied field, while the alignment is collinear for thicker spacers. A phenomenological model has been developed to reproduce and discuss the results. Complementary information has been obtained by means of spin polarized low energy electron microscopy.

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Titolo:	Magnetic properties of Fe/NiO/Fe(001) trilayers
Autori:	P. BIAGIONI A. BRAMBILLA M. PORTALUPI N. ROUGEMAILLE A. K. SCHMID A. LANZARA VAVASSORI, Paolo M. ZANI M. FINAZZI L. DUO F. CICCACCI mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2005
Rivista:	JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Abstract:	We have investigated the magnetic properties of epitaxially grown Fe/NiO/Fe(0 0 1) trilayers, for different thicknesses of the NiO spacer. Magneto Optical Kerr Effect has been exploited to study the in-plane magnetization reversal processes in the iron layers. We found that the NiO thickness tAFM has a critical value tC for the magnetic coupling between the Fe layers: for tAFM<tC the magnetization directions align perpendicularly, with zero applied field, while the alignment is collinear for thicker spacers. A phenomenological model has been developed to reproduce and discuss the results. Complementary information has been obtained by means of spin polarized low energy electron microscopy.
Handle:	http://hdl.handle.net/11392/1211074
Appare nelle tipologie:	03.1 Articolo su rivista

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