Critical behavior of the single-crystalline van der Waals bonded ferromagnet 
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Liu, Wei; Dai, Yuhui; Yang, Yue; Fan, Jiyu; Pi, Li; Zhang, Lei; Zhang, Yuheng

doi:10.1103/physrevb.98.214420

Cited by 52 publications

(36 citation statements)

References 40 publications

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“…Note added : Recently, we became aware that Liu et al reported the critical behavior of Cr 2 Ge 2 Te 6 obtained from the magnetocaloric effect around T C = 62 K. Their conclusions are consistent with our work.…”

Section: Discussionsupporting

confidence: 91%

Magnetic Entropy Scaling in Ferromagnetic Semiconductor CrGeTe₃

Sun

Luo

2019

Physica Status Solidi (b)

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The magnetocaloric effect and the magnetic entropy (ΔSM(T,H)) scaling around the magnetic transition temperature (TC) have been investigated in two‐dimensional ferromagnetic semiconductor (2D FS) CrGeTe3 single crystal. The ΔSM(T,H) and the relative cooling power (RCP) are about 3.21 J kg−1 K−1 and 94.3 J kg−1 under applied magnetic field H = 4.5 T, respectively. The ΔSM(T,H) under different magnetic fields can be scaled into a single curve independent of external field and temperature. Meanwhile, it has been found that ΔSM(T,H) follows the power law of Hn with n(T,H) = dln|SΔM(T,H)|/dln(H). Critical parameters n, l, and m have been obtained based on ΔSM(T,H). It has been found that the temperature‐dependent n at different magnetic fields scales into one universal line above TC, deviating from the scaling line at low temperature. This deviation can be attributed to the strong uniaxial anisotropy effect in CrGeTe3. This work figures out the magnetocaloric behavior of CrGeTe3, and will be helpful for understanding the origin of the ferromagnetism of similar 2D FSs.

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Section: Discussionsupporting

confidence: 91%

Magnetic Entropy Scaling in Ferromagnetic Semiconductor CrGeTe₃

Sun

Luo

2019

Physica Status Solidi (b)

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“…In fact, the isotropic saturation magnetization after the correction is in good agreement with the nearly isotropic g-factors obtained by ESR. Furthermore, the correction leads to a saturation moment close to 3 µ B /Cr, which is the expected moment for Cr 3+ with S = 3/2 and g ∼ 2 and is in good agreement with literature [11,12,19,23]. We note that the use of the correction factors yield the theoretically expected results which can be understood as a positive self-consistency check of the applied correction method.…”

Section: Discussionsupporting

confidence: 89%

“…Motivated by the above-mentioned aspects, Cr 2 Ge 2 Te 6 received considerable attention both experimentally [11,[17][18][19][20][21][22][23] and theoretically [5,24] during the last years. Aiming at a detailed understanding of the magnetic properties of this material, in bulk as well as in monolayer form, a quantitative characterization of the magnetic anisotropies represents a key task.…”

Section: Introductionmentioning

confidence: 99%

Magnetic anisotropy and spin-polarized two-dimensional electron gas in the van der Waals ferromagnet Cr2Ge2Te6

et al. 2019

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We report a comprehensive experimental investigation on the magnetic anisotropy in bulk single crystals of Cr2Ge2Te6, a quasi-two-dimensional ferromagnet belonging to the family of magnetic layered transition metal trichalcogenides that have attracted recently a big deal of interest with regard to the fundamental and applied aspects of two-dimensional magnetism. For this purpose electron spin resonance (ESR) and ferromagnetic resonance (FMR) measurements have been carried out over a wide frequency and temperature range. A gradual change in the angular dependence of the ESR linewidth at temperatures above the ferromagnetic transition temperature Tc reveals the development of two-dimensional spin correlations in the vicinity of Tc thereby proving the intrinsically low-dimensional character of spin dynamics in Cr2Ge2Te6. Angular and frequency dependent measurements in the ferromagnetic phase clearly show an easy-axis type anisotropy of this compound. Furthermore, these experiments are compared with simulations based on a phenomenological approach, which takes into account results of static magnetization measurements as well as high temperature g factors obtained from ESR spectroscopy in the paramagnetic phase. As a result the determined magnetocrystalline anisotropy energy density (MAE) KU is (0.48 ± 0.02) × 10 6 erg/cm 3 . This analysis is complemented by density functional calculations which yield the experimental MAE value for a particular value of the electronic correlation strength U . The analysis of the electronic structure reveals that the low-lying conduction band carries almost completely spin-polarized, quasihomogeneous, two-dimensional states. arXiv:1810.02560v3 [cond-mat.str-el]

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“…The direct observation of the VI 3 magnetocrystalline anisotropy was revealed by the angular dependence of magnetization at temperature 2 K in various magnetic fields H rotated within the ab plane and out-of-plane (orthogonal plane). The out-of-plane anisotropy exhibits a "butterflylike" pattern [16], different from the other 2D FM semiconductor Cr 2 Ge 2 Te 6 [27]. On the other hand, the angular signal of magnetization within the basal ab plane shows a six-fold-like symmetry.…”

Section: Introductionmentioning

confidence: 80%

Magnetic anisotropy in the van der Waals ferromagnet VI3

et al. 2021

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A comprehensive study of magnetocrystalline anisotropy of a layered van der Waals ferromagnet VI 3 was performed. We measured angular dependences of the torque and magnetization with respect to the direction of the applied magnetic field within the basal ab plane and a general orthogonal plane to ab, respectively. A twofold butterflylike signal was detected by magnetization in the orthogonal plane. This signal symmetry remains conserved throughout all magnetic regimes as well as through the known structural transition down to the lowest temperatures. The maximum of the magnetization signal and the resulting magnetization easy axis is significantly tilted from the normal to the basal ab plane by ∼40°. The close relation of the magnetocrystalline anisotropy to the crystal structure was documented. In contrast, a two-fold-like angular signal was detected in the paramagnetic region within the ab plane in the monoclinic phase, which transforms into a six-fold-like signal below the Curie temperature T C . With further cooling, another six-fold-like signal with an angular shift of ∼30°grows approaching T FM . Below T FM , in the triclinic phase, the original six-fold-like signal vanishes, being replaced by a secondary six-fold-like signal with an angular shift of ∼30°.

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Critical behavior of the single-crystalline van der Waals bonded ferromagnet Cr2Ge2Te6

Cited by 52 publications

References 40 publications

Magnetic Entropy Scaling in Ferromagnetic Semiconductor CrGeTe₃

Magnetic Entropy Scaling in Ferromagnetic Semiconductor CrGeTe₃

Magnetic anisotropy and spin-polarized two-dimensional electron gas in the van der Waals ferromagnet Cr2Ge2Te6

Magnetic anisotropy in the van der Waals ferromagnet VI3

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Critical behavior of the single-crystalline van der Waals bonded ferromagnet Cr2Ge2Te6

Cited by 52 publications

References 40 publications

Magnetic Entropy Scaling in Ferromagnetic Semiconductor CrGeTe3

Magnetic Entropy Scaling in Ferromagnetic Semiconductor CrGeTe3

Magnetic anisotropy and spin-polarized two-dimensional electron gas in the van der Waals ferromagnet Cr2Ge2Te6

Magnetic anisotropy in the van der Waals ferromagnet VI3

Contact Info

Product

Resources

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Magnetic Entropy Scaling in Ferromagnetic Semiconductor CrGeTe₃

Magnetic Entropy Scaling in Ferromagnetic Semiconductor CrGeTe₃