Abstract
The design of high-temperature ferrimagnetic materials is highly demanded for next-generation functional spintronic devices. Here, we propose that the combination of nonmetallic structural units and magnetic atoms is an effective way to achieve high-temperature magnetism in two-dimensional (2D) materials. The predicted monolayer, consisting of quasisquare units, shows intrinsic half-metal ferrimagnetism above room temperature. Each Fe atom is coordinated with four P atoms associated with the surrounding four quasisquare units. First-principles calculations suggest that the monolayer presents a Curie temperature of 460 K. More interestingly, the itinerant electrons and the unique quasisquare units act as intermediaries and play an important role in promoting the Ruderman-Kittel-Kasuya-Yosida and superexchange interactions, respectively, which induces a robust ferrimagnetism. Our findings not only shed light on the promising future of 2D magnetic materials, but also are of interest for high-temperature spintronic applications.
- Received 13 April 2022
- Revised 1 September 2022
- Accepted 20 December 2022
DOI:https://doi.org/10.1103/PhysRevB.107.024414
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