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 (8)

• Electrical switching of an antiferromagnet
• Room-temperature antiferromagnetic memory resistor
• Controlling orbital moment and spin orientation in CoO layers by strain
• Exchange coupling in transition metal monoxides: Electronic structure calculations
• Magnetic versus crystal field linear dichroism in NiO thin films
• Absence of Metallic Behavior in Epitaxial NiCo2O4 Thin Films: Role of Microstructural Disorder
• Steadfast perpendicular exchange coupling in an ultrathin CoO/PtFe double-layer: strain and spin orientation
• Magnetic coupling in highly-ordered NiO/Fe3O4(110): Ultrasharp magnetic interfaces vs. long-range magnetoelastic interactions

Cited by in corpus (7)

• 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
• Valence state and lattice incorporation of Ni in Zn/Co-based magnetic oxides
• A Platform for Addressing Individual Magnetite Islands Grown Epitaxially on Ru(0001) and Manipulating Their Magnetic Domains
• Electronic and magnetic properties of light rare-earth cubic Laves compounds derived from XMCD experiments
• Phase transitions of correlated systems from graph neural networks with quantum embedding techniques