Strong anisotropy and magnetostriction in the two-dimensional Stoner ferromagnet Fe3GeTe2

Houlong Zhuang, P. R.C. Kent, Richard G. Hennig

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

Computationally characterizing magnetic properies of novel two-dimensional (2D) materials serves as an important first step of exploring possible applications. Using density-functional theory, we show that single-layer Fe3GeTe2 is a potential 2D material with sufficiently low formation energy to be synthesized by mechanical exfoliation from the bulk phase with a van der Waals layered structure. In addition, we calculated the phonon dispersion demonstrating that single-layer Fe3GeTe2 is dynamically stable. Furthermore, we find that similar to the bulk phase, 2D Fe3GeTe2 exhibits a magnetic moment that originates from a Stoner instability. In contrast to other 2D materials, we find that single-layer Fe3GeTe2 exhibits a significant uniaxial magnetocrystalline anisotropy energy of 920μeV per Fe atom originating from spin-orbit coupling. Finally, we show that applying biaxial tensile strains enhances the anisotropy energy, which reveals strong magnetostriction in single-layer Fe3GeTe2 with a sizable magneostrictive coefficient. Our results indicate that single-layer Fe3GeTe2 is potentially useful for magnetic storage applications.

Original languageEnglish (US)
Article number134407
JournalPhysical Review B
Volume93
Issue number13
DOIs
StatePublished - Apr 6 2016
Externally publishedYes

Fingerprint

Magnetostriction
magnetostriction
Anisotropy
rocks
anisotropy
Magnetic storage
Magnetocrystalline anisotropy
Tensile strain
Magnetic moments
Density functional theory
Orbits
magnetic storage
energy of formation
Atoms
magnetic moments
density functional theory
orbits
energy
coefficients
atoms

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Strong anisotropy and magnetostriction in the two-dimensional Stoner ferromagnet Fe3GeTe2. / Zhuang, Houlong; Kent, P. R.C.; Hennig, Richard G.

In: Physical Review B, Vol. 93, No. 13, 134407, 06.04.2016.

Research output: Contribution to journalArticle

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