Field induced metamagnetism and large magnetic entropy change in RRhSi (R = Tb, Dy, Ho) rare earth intermetallics

Gupta, Sachin; Lukoyanov, A. V.; Knyazev, Yu. V.; Kuz’min, Yu. I.; Суреш, К. Г.

doi:10.1016/j.jallcom.2021.161493

Cited by 8 publications

(2 citation statements)

References 18 publications

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“…By adding one more element, T, which stands for a transition metal, to the family of binary RX compounds, one obtains another family of ternary RTX compounds with a variety of different properties [24][25][26]. One can observe a Dirac-like state at the highsymmetry point X, which is very close to the RTX family compound GdSbTe [27,28].…”

Section: Introductionmentioning

confidence: 99%

Semimetallic, Half-Metallic, Semiconducting, and Metallic States in Gd-Sb Compounds

Baidak

Lukoyanov

2023

IJMS

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The electronic and band structures of the Gd- and Sb-based intermetallic materials have been explored using the theoretical ab initio approach, accounting for strong electron correlations of the Gd-4f electrons. Some of these compounds are being actively investigated because of topological features in these quantum materials. Five compounds were investigated theoretically in this work to demonstrate the variety of electronic properties in the Gd-Sb-based family: GdSb, GdNiSb, Gd4Sb3, GdSbS2O, and GdSb2. The GdSb compound is a semimetal with the topological nonsymmetric electron pocket along the high-symmetry points Γ–X–W, and hole pockets along the L–Γ–X path. Our calculations show that the addition of nickel to the system results in the energy gap, and we obtained a semiconductor with indirect gap of 0.38 eV for the GdNiSb intermetallic compound. However, a quite different electronic structure has been found in the chemical composition Gd4Sb3; this compound is a half-metal with the energy gap of 0.67 eV only in the minority spin projection. The molecular GdSbS2O compound with S and O in it is found to be a semiconductor with a small indirect gap. The GdSb2 intermetallic compound is found to have a metallic state in the electronic structure; remarkably, the band structure of GdSb2 has a Dirac-cone-like feature near the Fermi energy between high-symmetry points Г and S, and these two Dirac cones are split by spin-orbit coupling. Thus, studying the electronic and band structure of several reported and new Gd-Sb compounds revealed a variety of the semimetallic, half-metallic, semiconducting, or metallic states, as well topological features in some of them. The latter can lead to outstanding transport and magnetic properties, such as a large magnetoresistance, which makes Gd-Sb-based materials very promising for applications.

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Section: Introductionmentioning

confidence: 99%

Semimetallic, Half-Metallic, Semiconducting, and Metallic States in Gd-Sb Compounds

Baidak

Lukoyanov

2023

IJMS

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“…As a result, a very large magnetic moments range can be established. Also, the rare-earth atoms in these samples are heavy, the spin-orbit interaction dominates to be responsible for strong magneto crystalline anisotropy [11]. Recently, Provino et al [12] reported the crystal structure, thermal stability, magnetic behavior and MCE of Gd 3 Ni 2 and Gd 3 CoNi compounds.…”

Section: Introductionmentioning

confidence: 99%

Magnetocaloric Properties in Gd₃Ni₂ and Gd₃CoNi Systems

Hsini¹,

Bouzidi²

2023

Latest Research on Energy Recovery

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Intermetallic Gd3Ni2 and Gd3CoNi undergo second-order ferromagnetic paramagnetic phase transition at the Curie temperature, TC. They exhibit a large magnetocaloric effect (MCE). This MCE is manifested with a high entropic peak of 8 and 8.3 J.Kg−1 K−1, at the vicinity TC under 5 T magnetic applied field for Gd3Ni2 and Gd3CoNi, respectively. With their boosted MCE and large refrigerant capacity, Gd3Ni2 and Gd3CoNi compounds can be a candidate as a magnetocaloric refrigerator which is still one of the current research projects recommended by the low energy consumption and low environmental impact of these devices. Based on the Landau theory, Gibb’s free energy leads to determine temperature-dependent parameters which correspond to the electron condensation energy and magnetoelastic coupling and the magnetic entropy change which is a very crucial parameter to evaluate the MCE of a given magnetic system.

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Magnetic phenomena in equiatomic ternary rare earth compounds

Gupta

2023

Handbook of Magnetic Materials

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Field induced metamagnetism and large magnetic entropy change in RRhSi (R = Tb, Dy, Ho) rare earth intermetallics

Cited by 8 publications

References 18 publications

Semimetallic, Half-Metallic, Semiconducting, and Metallic States in Gd-Sb Compounds

Semimetallic, Half-Metallic, Semiconducting, and Metallic States in Gd-Sb Compounds

Magnetocaloric Properties in Gd₃Ni₂ and Gd₃CoNi Systems

Magnetic phenomena in equiatomic ternary rare earth compounds

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Field induced metamagnetism and large magnetic entropy change in RRhSi (R = Tb, Dy, Ho) rare earth intermetallics

Cited by 8 publications

References 18 publications

Semimetallic, Half-Metallic, Semiconducting, and Metallic States in Gd-Sb Compounds

Semimetallic, Half-Metallic, Semiconducting, and Metallic States in Gd-Sb Compounds

Magnetocaloric Properties in Gd3Ni2 and Gd3CoNi Systems

Magnetic phenomena in equiatomic ternary rare earth compounds

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Product

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Magnetocaloric Properties in Gd₃Ni₂ and Gd₃CoNi Systems