Fe${}_{5-x}$Ge${}_2$Te${}_2$ -- A new exfoliable itinerant ferromagnet with high Curie temperature and large perpendicular magnetic anisotropy

Abstract

Layered van der Waals (vdW) crystals with intrinsic magnetic properties such as high Curie temperature (TC) 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 TC (220 K) and strong PMA. Here, we introduce a new metallic vdW ferromagnets, Fe5-xGe2Te2 or FG2T, which was 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. This work enables novel heterostructure devices with near room temperature capabilities by using FG2T as spin injector.

References in corpus (14)

• Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
• Discovery of intrinsic ferromagnetism in 2D van der Waals crystals
• Gate-tunable Room-temperature Ferromagnetism in Two-dimensional Fe${}_3$GeTe${}_2$
• Magnetic 2D materials and heterostructures
• Two-Dimensional Itinerant Ising Ferromagnetism in Atomically thin Fe3GeTe2
• Tunneling spin valves based on Fe${}_3$GeTe${}_2$/hBN/Fe${}_3$GeTe${}_2$ van der Waals heterostructures
• Hard magnetic properties in nanoflake van der Waals Fe3GeTe2
• Magnetic structure and phase stability of the van der Waals bonded ferromagnet Fe3-xGeTe2
• Highly efficient spin-orbit torque and switching of layered ferromagnet Fe3GeTe2
• Ferromagnetic van der Waals crystal VI3
• VI3 - a new layered ferromagnetic semiconductor
• Antisymmetric magnetoresistance in van der Waals Fe3GeTe2/graphite/Fe3GeTe2 tri-layer heterostructures
• Probing Magnetism in Insulating Cr2Ge2Te6 by Induced Anomalous Hall Effect in Pt
• Anomalous Hall effect in van der Waals bonded ferromagnet Fe${}_{3-x}$GeTe${}_2$

Cited by in corpus (5)

• Tuning Magnetic Order in the van der Waals Metal Fe5GeTe2 by Cobalt Substitution
• Magnetic Properties of NbSi2N4, VSi2N4, and VSi2P4 Monolayers
• Interlayer magnetism in Fe3-xGeTe2
• Tuning the Room Temperature Ferromagnetism in Fe5GeTe2 by Arsenic Substitution
• Tuning the Curie temperature of a 2D magnet/topological insulator heterostructure to above room temperature by epitaxial growth