Engineering Pt/Co/AlO x heterostructures to enhance the Dzyaloshinskii-Moriya interaction.
Babu Ram SankhiElena M EcheverriaSoumya MandalMuhammet AnnaorazovRitesh SachanDavid N McllroyDerek MeyersEmrah TurgutPublished in: Journal of physics. Condensed matter : an Institute of Physics journal (2023)
The study of interfacial Dzyaloshinskii-Moriya interaction (DMI) in perpendicularly magnetized structurally asymmetric heavy metal/ferromagnet multilayer systems is of high importance due to the formation of chiral magnetic textures in the presence of DMI. Here, we report the impact of cobalt oxidation at the Co/AlO x interface in Pt/Co/AlO x trilayer structures on the DMI by varying the post-growth annealing time, Al thickness and substrate. To quantify DMI we employed magneto-optical imaging of the asymmetric domain wall expansion, hysteresis loop shift, and spin-wave spectroscopy techniques. We further correlated the Co oxidation with low-temperature Hall effect measurements and x-ray photoelectron spectroscopy. Our results emphasize the importance of full characterization of the magnetic films that could be used for magnetic random access memory technologies when subjected to the semiconductor temperature processing conditions, as the magnetic interactions are critical for device performance and can be highly sensitive to oxidation and other effects.
Keyphrases
- high resolution
- molecularly imprinted
- room temperature
- heavy metals
- hydrogen peroxide
- solid state
- single molecule
- ionic liquid
- electron transfer
- solid phase extraction
- transcription factor
- risk assessment
- working memory
- gold nanoparticles
- magnetic resonance
- nitric oxide
- reduced graphene oxide
- capillary electrophoresis
- tandem mass spectrometry
- fluorescent probe
- amino acid
- drinking water