Ultrathin limit of exchange bias coupling at oxide multiferroic/ferromagnetic interfaces.
basic_science · Level V
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- Record sourced from PubMed, PMID 23847010.
- Also identified by DOI 10.1002/adma.201300940.
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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.