Magnetic structure and phase stability of the van der Waals bonded ferromagnet Fe3-xGeTe2

Research output: Contribution to journalArticlepeer-review

229 Scopus citations

Abstract

The magnetic structure and phase diagram of the layered ferromagnetic compound Fe3GeTe2 has been investigated by a combination of synthesis, x-ray and neutron diffraction, high-resolution microscopy, and magnetization measurements. Single crystals were synthesized by self-flux reactions, and single-crystal neutron diffraction finds ferromagnetic order with moments of 1.11(5)μB/Fe aligned along the c axis at 4 K. These flux-grown crystals have a lower Curie temperature Tc≈150 K compared to crystals previously grown by vapor transport (Tc=220 K). The difference is a reduced Fe content in the flux-grown crystals, as illustrated by the behavior observed in a series of polycrystalline samples. As Fe content decreases, so does the Curie temperature, magnetic anisotropy, and net magnetization. In addition, Hall effect and thermoelectric measurements on flux-grown crystals suggest multiple carrier types contribute to electrical transport in Fe3-xGeTe2 and structurally similar Ni3-xGeTe2.

Original languageEnglish
Article number014411
JournalPhysical Review B
Volume93
Issue number1
DOIs
StatePublished - Jan 8 2016

Fingerprint

Dive into the research topics of 'Magnetic structure and phase stability of the van der Waals bonded ferromagnet Fe3-xGeTe2'. Together they form a unique fingerprint.

Cite this