Applied Physics Letters · 2005 · 36 citations · 9 references
Natural SciencesMaterials EngineeringMaterials ScienceElectronic MaterialsMagnetic MaterialsMaterials ChemistryFerromagnetismMagnetic AnisotropyMagnetic OxidesMagnetism In SolidsPerovskite MaterialsThin Film Magnetic PropertiesJunction GeometryMagnetic PerovskitesMagnetic Tunnel JunctionsMagnetization ReversalMagnetoresistanceManganitesTunnel JunctionsTunnel Magnetoresistance
We have fabricated (La,Sr)MnO3 (LSMO)-based magnetic tunnel junctions with Ru-doped LSMO (LSMRO) film used as one of the electrodes. The Ru doping enhances the coercivity of LSMO, resulting in a sharp steplike tunnel magnetoresistance (TMR) response with a high contrast in the coercive field (Hc) for magnetization reversal. Although the difference of the Hc between the top LSMRO and the bottom LSMO electrodes decreases with increasing the temperature, it is large enough to give a clear TMR response even at a relatively higher temperature region of around 200K. By changing the dimensions of the top LSMRO electrode, the Hc is found to have no dependence on the geometric aspect variations of the top electrode but slightly on the junction area.
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Engineered Interface of Magnetic Oxides
Hiroyuki Yamada, Yoshihiro Ogawa, Yuji Ishii et al. · Science · 2004 · 379 citations
Natural Sciences, Materials Engineering, Materials Science +16