Room-temperature Intrinsic Ferromagnetic Chromium Tellurium Compounds with Thickness-tunable Magnetic Texture.

Two-dimensional (2D) ferromagnetic chromium tellurides exhibit intriguing spin configurations and high-temperature intrinsic ferromagnetism, providing unprecedented opportunities to explore the fundamental spin physics and build spintronic devices. Here, we developed a generic van der Waals epitaxial approach to synthesize the 2D ternary chromium tellurium compounds with thicknesses down to mono-, bi-, tri-, and few-unit cell (UCs). The Mn 0.14 Cr 0.86 Te evolves from intrinsic ferromagnetic behavior in bi-UC, tri-UC, and few- UC to temperature-induced ferrimagnetic behavior as the thickness increases, resulting in a sign reversal of the anomalous Hall resistance. Temperature- and thickness-tunable labyrinthine-domain ferromagnetic behaviors were derived from the dipolar interactions in Fe 0.26 Cr 0.74 Te and Co 0.40 Cr 0.60 Te. Furthermore, the dipolar-interaction-induced stripe domain and field-induced domain wall motion (DW) velocity were studied, and multibit data storage was realized through an abundant DW state. The magnetic storage can function in neuromorphic computing tasks, and the pattern recognition accuracy can reach up to 97.93%, which is similar to the recognition accuracy of ideal software-based training (98.28%). Room-temperature ferromagnetic chromium tellurium compounds with intriguing spin configurations can significantly promote the exploration of the processing, sensing, and storage based on 2D magnetic systems. This article is protected by copyright. All rights reserved.