biostudies-literatureZhu WNatural Science Foundation of Beijing MunicipalityNational Natural Science Foundation of ChinaNational Key Research and Development Program of Chinanwac173https://www.ebi.ac.uk/biostudies/studies/S-EPMC9843128biostudies-literatureUnknown10(1)Emerging van der Waals (vdW) magnets provide a paradise for the exploration of magnetism in the ultimate two-dimensional (2D) limit, and the construction of integrated spintronic devices, and have become a research frontier in the field of low-dimensional materials. To date, prototypical vdW magnets based on metals of the first transition series (e.g. V, Cr, Mn and Fe) and chalcogen elements suffer from rapid oxidation restricted by the Hard-Soft-Acid-Base principle, as well as low Curie temperatures (<i>T</i> _C), which has become a generally admitted challenge in 2D spintronics. Here, starting from air-unstable Cr₂Ge₂Te₆ vdW thin flakes, we synthesize Ge-embedded PtTe₂ (namely PtTe₂Ge_1/3) with superior air stabilNational science reviewAnomalous displacement reaction for synthesizing above-room-temperature and air-stable vdW ferromagnet PtTe₂Ge_1/3.PMC984312851871130JQ200102021YFB360130152225106Wang QYin SPan FSong CZhu WBai HfalseAnomalous displacement reaction for synthesizing above-room-temperature and air-stable vdW ferromagnet PtTe₂Ge_1/3.Emerging van der Waals (vdW) magnets provide a paradise for the exploration of magnetism in the ultimate two-dimensional (2D) limit, and the construction of integrated spintronic devices, and have become a research frontier in the field of low-dimensional materials. To date, prototypical vdW magnets based on metals of the first transition series (e.g. V, Cr, Mn and Fe) and chalcogen elements suffer from rapid oxidation restricted by the Hard-Soft-Acid-Base principle, as well as low Curie temperatures (<i>T</i> _C), which has become a generally admitted challenge in 2D spintronics. Here, starting from air-unstable Cr₂Ge₂Te₆ vdW thin flakes, we synthesize Ge-embedded PtTe₂ (namely PtTe₂Ge_1/3) with superior air stabil2023-01-01T00:00:00Z2023 Jan2026-03-27T15:48:49.366Z2024-11-09T02:24:02.465ZS-EPMC98431283668451510.1093/nsr/nwac173