Engineering Pt/Co/AlOxheterostructures to enhance the Dzyaloshinskii-Moria interaction.
Babu Ram SankhiElena EcheverriaSoumya MandalMuhammet AnnaorazovRitesh SachanDave N McIlroyDerek MeyersEmrah TurgutPublished in: Journal of physics. Condensed matter : an Institute of Physics journal (2023)
The study of interfacial Dzyaloshinskii-Moria 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/AlOx interface in Pt/Co/AlOx 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
- single molecule
- solid state
- ionic liquid
- mass spectrometry
- electron transfer
- solid phase extraction
- risk assessment
- transcription factor
- nitric oxide
- high speed
- computed tomography
- reduced graphene oxide
- living cells
- fluorescent probe
- capillary electrophoresis