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Updated: Jan 19, 2026

Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
Published on: June 9, 2023
Tuning the Néel temperature in an antiferromagnet: the case of NixCo1-xO microstructures
Anna Mandziak1,2, Guiomar D Soria3, José Emilio Prieto3
1Instituto de Química Física Rocasolano (CSIC), Madrid, E-28006, Spain. ania.mandziak@iqfr.csic.es.
Abstract:
We 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.
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