Critical behavior of the ferromagnetic transition in GdSc(Si,Ge) intermetallic compounds

Herrero, A.; Oleaga, A.; Manfrinetti, P.; Provino, A.; Salazar, A.

doi:10.1016/j.intermet.2018.07.011

Cited by 14 publications

(10 citation statements)

References 50 publications

(64 reference statements)

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“…GdScSi and CeScSi exhibits FM and AFM ordering at 354 K and 26 K, respectively. The study of critical behaviour of GdScSi reveals that the magnetic interactions are short ranged, and the values of the critical parameters obtained are consistent with the 3D-Heisenberg class [23]. The critical parameters obtained from a similar study of NdScSi are in excellent agreement with the 3D XY universality class [24].…”

Section: Introductionsupporting

confidence: 60%

Existence of complex magnetic ground state and topological Hall effect in centrosymmetric silicide DyScSi

Yadav,

Singh

et al. 2023

New J. Phys.

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Topological Hall effect (THE) originating from non-trivial spin arrangements in magnetic materials has been extensively investigated in recent years. In this context, a centrosymmetric ternary silicide, DyScSi, is explored. Here we show that, a complex magnetic ground state drives THE in a centrosymmetric system. Temperature dependent magnetisation and neutron diffraction results establish the presence of commensurate antiferromagnetic (AFM) phase around 92 K, followed by an incommensurate AFM phase below 40 K. Additionally, two cluster glass transitions near 20 and 8 K, are also noted. These observed features arise due competing AFM and FM interactions. In conjunction with this, a finite contribution of THE is also observed in the intermediate field regime (8–30 kOe), at low temperature in DyScSi. The behaviour of this silicide appears to be fascinating in terms of interplay between complex magnetic ground state and THE in centrosymmetric structure.

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Section: Introductionsupporting

confidence: 60%

Existence of complex magnetic ground state and topological Hall effect in centrosymmetric silicide DyScSi

Yadav,

Singh

et al. 2023

New J. Phys.

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“…Thermal diffusivity has been obtained as a function of temperature from room temperature down to 30 K, paying special attention to the region around the magnetic transitions. This technique is very well suited to study the critical behavior in phase transitions and has been successfully applied to solid and liquid crystals (magnetic as well as ferroelectric transitions), including other intermetallic materials [19,[27][28][29][30][31][32][33][34][35], as it combines very low temperature rates (down to 5-10 mK/min) with a high sensitivity. The details of the experimental setup, as well as of the theory explaining how to extract the thermal diffusivity from the photopyroelectric signal, can be found elsewhere [29,36].…”

Section: Samples and Experimental Techniquesmentioning

confidence: 99%

Comprehensive study of the magnetic phase transitions in Tb3Co combining thermal, magnetic and neutron diffraction measurements

et al. 2019

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A comprehensive study of the magnetic phase transitions in Tb 3 Co has been undertaken combining different techniques. Using single crystal neutron diffraction in the paramagnetic state a weak crystal structure distortion from the room temperature orthorhombic structure of the Fe 3 C type described with the Pnma space group toward structure with lower symmetry has been observed with cooling below 100 K. At 81 K there is a second order phase transition to an antiferromagnetic incommensurate phase with the propagation vector k = (0.155, 0, 0). As derived from thermal diffusivity measurements, the critical exponents for this transition are very close to the 3D-Heisenberg universality class, proving that the magnetic interactions are short-range but with a deviation from perfect isotropy due to crystal field effects. At T 2  70 K there is another magnetic phase transition to a ferromagnetic state whose character is shown to be weakly first order. The low temperature magnetic state has a non-coplanar ferromagnetic structure with strong ferromagnetic components of Tb magnetic moments along the crystallographic c-axis. The application of an external magnetic field B = 2 T along the

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“…No HA 3150/5-1. estimate η = 0.03780 (8). As the final estimate we quote η = 0.03782 (10) , (A7) which covers both the estimates obtained from the data for fixing Z a /Z p = 0.19477 and ξ 2nd /L = 0.56404.…”

Section: Acknowledgementmentioning

confidence: 70%

“…An example for a more recent experimental study is ref. [8]. In table 2 of [8] estimates for the critical exponents β, γ, δ and α are presented for four different materials.…”

Section: Introductionmentioning

confidence: 99%

“…[8]. In table 2 of [8] estimates for the critical exponents β, γ, δ and α are presented for four different materials. To get an idea of the accuracy that is achieved let us pick out two results for GdScGe: α = −0.134 ± 0.005 for the exponent of the specific heat and δ = 4.799 ± 0.006 for the critical exponent of the magnetization on the critical isotherm.…”

Section: Introductionmentioning

confidence: 99%

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Monte Carlo study of a generalized icosahedral model on the simple cubic lattice

Hasenbusch

2020

Preprint

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We study the critical behavior of a generalized icosahedral model on the simple cubic lattice.In addition to twelve vectors of unit length which are given by the normalized vertices of the icosahedron, the field variable is allowed to take the value (0, 0, 0). There is a parameter D that controls the density of zeros. For a certain range of D, the model undergoes a second order phase transition. On the critical line, O(3) symmetry emerges. Furthermore, we demonstrate that within this range, there is a value, where leading corrections to scaling vanish. We perform Monte Carlo simulations for lattices of a linear size up to L = 400 by using a hybrid of local Metropolis and cluster updates. The motivation to study this particular model is mainly of technical nature.Less memory and CPU time are needed than for a model with O(3) symmetry at the microscopic level. As the result of a finite size scaling analysis we obtain ν = 0.71164(10), η = 0.03784(5) and ω = 0.759(2) for the critical exponents of the three-dimensional Heisenberg universality class. The estimate of the irrelevant RG-eigenvalue that is related with the breaking the O(3) symmetry is

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Critical behavior of the ferromagnetic transition in GdSc(Si,Ge) intermetallic compounds

Cited by 14 publications

References 50 publications

Existence of complex magnetic ground state and topological Hall effect in centrosymmetric silicide DyScSi

Existence of complex magnetic ground state and topological Hall effect in centrosymmetric silicide DyScSi

Comprehensive study of the magnetic phase transitions in Tb3Co combining thermal, magnetic and neutron diffraction measurements

Monte Carlo study of a generalized icosahedral model on the simple cubic lattice

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