The availability of 2D materials with ferromagnetic behavior has remained elusive until recently with several different platforms (CrI3, CrGeTe3, etc) being synthesized, exhibiting long range ferromagnetic ordering down to a few layers. A major hurdle to overcome in these materials is the intrinsically low Curie temperatures, limiting their use in any future applications. Cr-tellurides have a rich phase diagram with many stable stoichiometries that have varying Curie temperatures that approach room temperature. This has prompted a greater interest in studying these materials but to date there are a limited number of solution phase methods with chemical vapor deposition and molecular beam epitaxy being used to grow bulk crystals or thin films. Herein, we provide solution phase method that is able to target multiple stoichiometries of Cr-tellurides including CrTe3, CrTe2, and Cr2Te3. Through our synthesis we are able to obtain antiferromagnetic CrTe3 in the solution phase for the first time, where it can be used as the starting material to synthesize ferromagnetic CrTe2 and Cr2Te3. The magnetic properties of the material are studied and used to verify the stoichiometry of the Cr-tellurides in addition to x-ray diffraction and electron microscopy. This method provides a simplified solution phase synthesis towards obtaining multiple stoichiometries of Cr-tellurides without the use of complicated solid state methodologies.

Accessing different stoichiometric phases of Cr – tellurides through solution phase synthesis

ACS Spring 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.