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Adv Mater. 2013 Sep 14;25(34):4739-45. doi: 10.1002/adma.201300940. Epub 2013 Jul 12.

Ultrathin limit of exchange bias coupling at oxide multiferroic/ferromagnetic interfaces.

Author information

1
MESA+ Institute for Nanotechnology, University of Twente, P.O. BOX 217, 7500 AE, Enschede, The Netherlands. m.huijben@utwente.nl.

Abstract

Exchange bias coupling at the multiferroic- ferromagnetic interface in BiFeO₃ /La₀.₇ Sr₀.₃ MnO₃ heterostructures exhibits a critical thickness for ultrathin BiFeO₃ layers of 5 unit cells (2 nm). Linear dichroism measurements demonstrate the dependence on the BiFeO₃ layer thickness with a strong reduction for ultrathin layers, indicating diminished antiferromagnetic ordering that prevents interfacial exchange bias coupling.

KEYWORDS:

exchange bias; ferromagnet; interface; multiferroic; oxide heterostructure

PMID:
23847010
DOI:
10.1002/adma.201300940
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