Magnetic critical behavior of the van der Waals Fe5GeTe2 crystal with near room temperature ferromagnetism

Abstract

The van der Waals ferromagnet Fe5GeTe2 has a Curie temperature TC of about 270 K, which can be raised above room temperature by tuning the Fe deficiency content. To achieve insights into its ferromagnetic exchange, we have studied the critical behavior by measuring the magnetization in bulk Fe5GeTe2 crystal around the ferromagnetic to paramagnetic phase transition. The analysis of the magnetization by employing various techniques including the modified Arrott plot, Kouvel-Fisher plot and critical isotherm analysis achieved a set of reliable critical exponents with TC = 273.7 K, beta = 0.3457, gamma = 1.40617, and delta = 5.021, suggesting a three-dimensional magnetic exchange with the distance decaying as J(r) ~ (r)$^-4.916, which is close to that of a three-dimensional Heisenberg model with long-range magnetic coupling.

22 pages, 2 tables, 6 figures

References in corpus (6)

• Electric Field Effect in Atomically Thin Carbon Films
• Controlling many-body states by the electric-field effect in a two-dimensional material
• Tricritical behavior of two-dimensional intrinsic ferromagnetic semiconducting CrGeTe3
• Physical properties and thermal stability of Fe5GeTe2 single crystals
• Tunable magnetic properties in van der Waals crystals (Fe${}_{1-x}$Co${}_x$)${}_5$GeTe${}_2$
• Critical behavior of quasi-two-dimensional semiconducting ferromagnet CrGeTe${}_3$

Cited by in corpus (20)

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• Coexistence of Merons with Skyrmions in the Centrosymmetric van der Waals Ferromagnet Fe5GeTe2
• Type II multiferroic order in two-dimensional transition metal halides from first principles spin-spiral calculations
• Revealing room temperature ferromagnetism in exfoliated Fe${}_5$GeTe${}_2$ flakes with quantum magnetic imaging
• Magnetic Anisotropy in Two-dimensional van der Waals Magnetic Materials and Their Heterostructures: Importance, Mechanisms, and Opportunities
• Anomalous resistivity upturn in the van der Waals ferromagnet Fe${}_5$GeTe${}_2$
• Reversible Non-Volatile Electronic Switching in a Near Room Temperature van der Waals Ferromagnet
• Tuning the Room Temperature Ferromagnetism in Fe5GeTe2 by Arsenic Substitution
• Thermal cycling induced alteration of the stacking order and spin-flip in the room temperature van der Waals magnet Fe${}_5$GeTe${}_2$
• Disentangling the unusual magnetic anisotropy of the near-room-temperature ferromagnet Fe${}_4$GeTe${}_2$
• Enhanced $d$-$p$ hybridization intertwined with anomalous ground state formation in van der Waals-coupled magnetic metal Fe${}_5$GeTe${}_2$
• Anisotropic magnetization dynamics in Fe5GeTe2 at room temperature
• Layered Topological Antiferromagnetic Metal at Room Temperature -- YbMn${}_2$Ge${}_2$
• Monolayer Fe${}_3$GaX${}_2$ (X=I, Br, Sb): high-temperature two-dimensional magnets and a novel partially ordered spin state
• Dichotomy of flat bands in the van der Waals ferromagnet Fe${}_5$GeTe${}_2$
• Quenching the Non-Collinear Spin Order in High-Tc Layered Ferromagnet Fe5GeTe2
• Strain-Mediated Lattice Reconstruction Enhances Ferromagnetism in Cr2Ge2Te6/WTe2 van der Waals Heterobilayers