Physics – Condensed Matter – Materials Science
Scientific paper
2010-09-14
Physics
Condensed Matter
Materials Science
10 figures, 8 pages
Scientific paper
10.1016/j.jmmm.2011.06.053
We studied the magnetic behavior of bilayers of multiferroic and nominally antiferromagnetic o-YMnO$_3$ (375~nm thick) and ferromagnetic La$_{0.7}$Sr$_{0.3}$MnO$_3$ and La$_{0.67}$Ca$_{0.33}$MnO$_3$ ($8 \ldots 225~$nm), in particular the vertical magnetization shift $M_E$ and exchange bias field $H_E$ for different thickness and magnetic dilution of the ferromagnetic layer at different temperatures and cooling fields. We have found very large $M_E$ shifts equivalent to up to 100\% of the saturation value of the o-YMO layer alone. The overall behavior indicates that the properties of the ferromagnetic layer contribute substantially to the $M_E$ shift and that this does not correlate straightforwardly with the measured exchange bias field $H_E$.
Arenholz Elke
Barzola-Quiquia J.
Bridoux German
Esquinazi Pablo
Ohldag H.
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