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

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.

References in corpus (3)

• Controlling orbital moment and spin orientation in CoO layers by strain
• Magnetic versus crystal field linear dichroism in NiO thin films
• Magnetic coupling in highly-ordered NiO/Fe3O4(110): Ultrasharp magnetic interfaces vs. long-range magnetoelastic interactions

Cited by in corpus (4)

• Cavity-Enhanced Linear Dichroism in a van der Waals Antiferromagnet
• Coupling of electronic and structural degrees of freedom in vanadate superlattices
• RBS/Channeling characterization of Ru(0001) and thin epitaxial Ru/Al${}_2$O${}_3$(0001) films
• A Platform for Addressing Individual Magnetite Islands Grown Epitaxially on Ru(0001) and Manipulating Their Magnetic Domains