Fe₃₋ₓGeTe₂

The Fe-deficient variant of the layered van der Waals ferromagnet Fe₃GeTe₂, space group P6₃/mmc. It is an itinerant two-dimensional ferromagnet with strong perpendicular anisotropy, whose Curie temperature (~150–230 K) and magnetic properties are highly sensitive to the Fe vacancy concentration x. This tunability, combined with gate- and intercalation-driven control of T_c toward room temperature, makes Fe₃₋ₓGeTe₂ a key model system for studying itinerant magnetism, heavy-fermion-like behavior, and two-dimensional spintronics.

Growth method: Flux growth.

Sample specifications: Individual crystals measure approximately 1~2 mm, with a purity of up to 99.9999% (6N), and multiple high-quality single-crystal pieces included in each package.

Exfoliation: Easy — readily cleaved into thin flakes by standard mechanical exfoliation.