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Tuning the Néel temperature in an antiferromagnet: the case of NixCo1−xO microstructures

AuthorsMandziak, Anna; Delgado Soria, Guiomar ; Prieto, J. E. ; Prieto Recio, Pilar; Granados-Miralles, Cecilia ; Quesada, Adrián ; Foerster, Michael; Aballe, Lucía; de la Figuera, Juan ; AMPHIBIAN Project ID:720853
KeywordsInformation storage
Magnetic properties
Structural properties
Thin films
Issue Date19-Sep-2019
PublisherNature Publishing Group
CitationScientific Reports 9: 13584 (2019)
AbstractWe show that it is possible to tune the Néel temperature of nickel(II)-cobalt(II) oxide films by changing the Ni to Co ratio. We grow single crystalline micrometric triangular islands with tens of nanometers thickness on a Ru(0001) substrate using high temperature oxygen-assisted molecular beam epitaxy. Composition is controlled by adjusting the deposition rates of Co and Ni. The morphology, shape, crystal structure and composition are determined by low-energy electron microscopy and diffraction, and synchrotron-based x-ray absorption spectromicroscopy. The antiferromagnetic order is observed by x-ray magnetic linear dichroism. Antiferromagnetic domains up to micrometer width are observed.
Publisher version (URL)https://doi.org/10.1038/s41598-019-49642-8
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