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Evidence for strong magnon contribution to the TMR temperature dependence in MgO based tunnel junctions
We have prepared MgO based magnetic tunnel junctions which show up to 143% tunneling magnetoresistance (TMR) ratio at room temperature and 205% at 12 K. This TMR temperature dependence is mainly
Time-resolved measurement of the tunnel magneto-Seebeck effect in a single magnetic tunnel junction.
TLDR
A setup for time-resolved measurements of thermovoltages and thermocurrents of a single micro- to nanometer-scaled tunnel junction is presented and it is possible to distinguish different Seebeck voltage contributions to the overall measured voltage signal in the μs time regime.
Insights into Ultrafast Demagnetization in Pseudogap Half-Metals
Interest in femtosecond demagnetization dynamics was sparked by Bigot's experiment in 1996, which unveiled the elementary mechanisms that relate the electrons' temperature to their spin order.
Inelastic electron tunneling spectra of MgO-based magnetic tunnel junctions with different electrode designs
MgO-based magnetic tunnel junctions with up to 230% tunnel magnetoresistance ratio at room temperature and up to 345% at 13 K are prepared. The lower electrode is either exchange-biased or free,
Electric breakdown in ultrathin MgO tunnel barrier junctions for spin-transfer torque switching
Magnetic tunnel junctions for spin-transfer torque (STT) switching are prepared to investigate the dielectric breakdown. Intact and broken tunnel junctions are characterized by transport measurements
The influence of the texture on properties of IrMn spin valve magnetic tunnel junctions with MgO barrier and CoFeB electrodes
The influence of seed‐buffer layers on the texture and tunneling parameters was investigated. The spin valve magnetic tunnel junctions (SV‐MTJs) were deposited onto thermally oxidized Si wafers by
Co/Pt multilayer-based magnetic tunnel junctions with perpendicular magnetic anisotropy
Temperature-dependent transport measurements of magnetic tunnel junctions with perpendicularly magnetized Co/Pt electrodes are presented. Magnetization measurements of the Co/Pt multilayers are
Direct imaging of the structural change generated by dielectric breakdown in MgO based magnetic tunnel junctions
MgO based magnetic tunnel junctions are prepared to investigate the dielectric breakdown of the tunnel barrier. The breakdown is directly visualized by transmission electron microscopy measurements.
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