Direct observation of exchange bias related uncompensated spins at the CoO/Cu interface

V. K. Valev, M. Gruyters, A. Kirilyuk, Th Rasing

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

Magnetization-induced optical second harmonic generation (MSHG) from the exchange-biased CoO/Cu-(X)/Fe multilayer shows the presence of pinned uncompensated spins at the CoO/Cu interface. For increasing Cu spacer thickness, the exchange bias measured via the hysteresis loop shift diminishes and disappears at X=3.5nm, while the MSHG signal still shows a strong magnetic contribution from the CoO interface. This indicates that the magnetic interaction between Fe and CoO layers is sufficiently strong to induce order in the antiferromagnetic layer even at a spacer thickness for which there is no observable hysteresis loop shift.

Original languageEnglish
JournalPhysical Review Letters
Volume96
Issue number6
DOIs
Publication statusPublished - 27 Feb 2006

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