SFB 1238 | May 06, 14:30
Reversal mechanism in antiferromagnetically coupled Ru-doped manganite/nickelate multilayers studied by polarized neutron reflectometry
All-oxide synthetic antiferromagnets (SAFs) were realized in multilayer structures composed of Ru-doped manganite and nickelate spacer layers. By employing an odd number of ferromagnetic layers, the design enables manipulation of the SAF state at relatively low magnetic fields due to the presence of uncompensated magnetic moments. For practical implementation in spintronic devices, it is crucial to determine the stability of these SAF states and their sensitivity to stray magnetic fields. Magnetization reversal in such multilayers is non trivial, arising from the interplay between antiferromagnetic interlayer exchange coupling, tilted magnetic anisotropy, and structurally favored domain formation. This leads to strongly direction-dependent hysteretic behavior. Polarized neutron reflectometry provides a powerful approach to probe the in-plane magnetization components versus external field, offering key insights into the underlying reversal mechanisms and SAF robustness.
MPI-Stuttgart
PH2
Contact: Ionela Vrejoiu / Matteo Cacco