Pinned Co moments in a polycrystalline permalloy/CoO exchange-biased bilayer

Elizabeth Blackburn, C Sanchez-Hanke, S Roy, DJT Smith, JI Hong, KT Chan, AE Berkowitz, SK Sinha

Research output: Contribution to journalArticle

30 Citations (Scopus)


We have measured element-specific magnetization depth profiles across the interface between a polycrystalline ferromagnet and an antiferromagnet in an exchange-biased bilayer of Py/CoO. Using soft x-ray resonant reflectivity we have identified a thin (0.5 nm) layer containing uncompensated Co magnetization at the interface with the Py. The majority of this magnetization follows the external field; however, similar to 10% of the magnetization in this interfacial layer is pinned antiparallel to the cooling field used when biasing the sample, consistent with the negative exchange bias in this bilayer system, provided that the pinned Co spins are antiferromagnetically coupled to the ferromagnetic layer.
Original languageEnglish
Article number180408
JournalPhysical Review B
Issue number18
Early online date1 Nov 2008
Publication statusPublished - 1 Nov 2008


Dive into the research topics of 'Pinned Co moments in a polycrystalline permalloy/CoO exchange-biased bilayer'. Together they form a unique fingerprint.

Cite this