Journal
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
Volume 14, Issue 3, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssr.201900666
Keywords
density functional theory calculations; exfoliation; ferromagnetism; perpendicular magnetic anisotropy; van der Waals materials
Funding
- UC Riverside
- National Science Foundation [DMR-1654780]
- DOE BES Award [DE-FG02-07ER46351]
- U.S. Department of Energy (DOE) [DE-FG02-07ER46351] Funding Source: U.S. Department of Energy (DOE)
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Layered van der Waals (vdW) crystals with intrinsic magnetic properties such as high Curie temperature (T-C) and large perpendicular magnetic anisotropy (PMA) are key to the development and application of spintronic devices. The ferromagnetic vdW metal Fe3-xGeTe2 (FGT) has gained prominence recently due to its high T-C (220 K) and strong PMA. Herein, a new metallic vdW ferromagnet, Fe5-xGe2Te2 or FG2T, is introduced, which is successfully synthesized and fully characterized. FG2T is a metal that orders ferromagnetically with a very sharp transition at 250 K (bulk and single-crystal thin flakes) and shows large PMA, as found by both experimental and computational studies. Novel heterostructure devices with near-room-temperature capabilities using FG2T as a spin injector are enabled by this work.
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