Magnetic and transport properties of inverse Heusler compound Cr2CoAl

Datta, Amrita; Modak, M.; Paul, Pralay; Patidar, Manju Mishra; Rao, T. V. Chandrasekhar; Ganesan, V.; Banerjee, S.

doi:10.1016/j.jmmm.2020.167522

Cited by 8 publications

(4 citation statements)

References 32 publications

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“…[18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] In recent years, researchers have also focused on the Cr 2 CoAl inverse Heusler phase. [34][35][36][37][38][39][40] It was noted by Jamer et al [35] that synthesizing half-metallic fully compensated ferrimagnets which form in the inverse Heusler phase could lead to superior spintronic devices, and these materials would have high spin polarization at room temperature with very little fringing magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

Phase Equilibria in the Al-Cr-Co System in the Range of Compositions 0-70 at.% Al

Korniyenko

Kriklya

Petyukh

et al. 2021

J. Phase Equilib. Diffus.

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Phase equilibria during solidification in the Al-Cr-Co system in the range of compositions 0-70 at.% Al were studied using optical microscopy, scanning electron microscopy, electron probe microanalysis, differential thermal analysis and x-ray diffraction. Solidus and liquidus surfaces, a melting diagram as their superposition, a Scheil diagram for solidification, as well as series of isopleths were constructed for the first time. Solid solutions based on Cr, aCo, Cr 5 Al 8 (c 3 and c 1 phases), CoAl, Co 2 Al 5 binary compounds and the ternary compound s 5 take part in phase equilibria. The monoclinic ternary compound s 5 forms by peritectic reaction L ? c 1 ? Co 2 Al 5 $ s 5 at 1065°C. Four invariant four-phase reactions and one invariant threephase reaction involving liquid take place at 1280, 1175, 1110, 1065 and about 1480°C, respectively. Isopleths 10, 20, 30 and 40 at.% Al as well as 40 at.% Cr demonstrate peculiarities of the phase diagram.

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Section: Introductionmentioning

confidence: 99%

Phase Equilibria in the Al-Cr-Co System in the Range of Compositions 0-70 at.% Al

Korniyenko

Kriklya

Petyukh

et al. 2021

J. Phase Equilib. Diffus.

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“…The metallic specific heat as a function of temperature is suggested to follow the equation as below: where the first term γ T represents the electronic specific heat and the second term is the contribution of the lattice/phonon to specific heat. γ is the electronic coefficient, which can be estimated by an equation of γ = , where D ( E F ) is the density of state at the Fermi level E F .…”

Section: Resultsmentioning

confidence: 99%

“…At LT, eq can be simplified as: where β is the phonon coefficient. As for the magnetic system, the extra magnon contribution to the specific heat can be described with an extra term of α T 3/2 for the ferromagnetic system , or δ T 3 for the antiferromagnetic system . In case of the antiferromagnetic RAlGe (R = Tb and Er) system, the expression of C ( T ) can be written as: where the second term σ T 3 corresponds to the contributions of the magnon and phonon.…”

Section: Resultsmentioning

confidence: 99%

“…At the zero field, the specific heat capacity of RAlGe shows two peaks at 7 and 38.3 K for TbAlGe and one peak at 6.7 K for ErAlGe, respectively, which correspond to the magnetic transitions of RAlGe shown in Figure3a,b. It reveals that the heat capacity transitions of RAlGe are associated with their magnetic transitions.The metallic specific heat as a function of temperature is suggested to follow the equation as below:48…”

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confidence: 99%

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Correlation between Slanted Magnetic Structure and Electromagnetic Responses in the RAlGe (R = Tb and Er) System

Guo

Wang

2021

J. Phys. Chem. C

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The structure, specific heat, and magnetic and transport properties of RAlGe (R = Tb and Er) are systematically studied using X-ray diffraction and magnetic and electric measurements. RAlGe crystallizes in an orthorhombic YAlGe-type structure with a space group of Cmcm (N 63, oS12). RAlGe consists of the slanted magnetic isosceles triangles R3Δ-∇R3 and Ge-Al6-Ge and AlGe2-Al-Ge2Al clusters. TbAlGe exhibits two transitions at T t = 7 K and T N = 39 K, respectively. ErAlGe orders antiferromagnetically at T N = 7 K. The magnetic transitions are related to the slanted R3 magnetic isosceles triangles in the (0kl) basal plane. According to the reported magnetic structure of RAlGa, the arrangement of triangular magnetic moments for RAlGe is suggested to be antiparallel along the direction perpendicular to the (0kl) basal plane in the temperature region of T < T t and along the prism of R3 magnetic isosceles triangle on the (0kl) basal plane before T N, respectively. The antiferromagnetic order is due to the R3Δ↑ and R3∇↓ exchanging interaction. The magnetic transport of RAlGe depends upon its special magnetic structure, which causes the different magnetic scatters for the conducting electron before and after antiferromagnetic transition and also induces a magnetoresistance ratio change from positive to negative.

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Dynamic evolution from positive to negative magnetoresistance of RAlGe (R = Dy, Ho) with disordered orthorhombic structure

Guo

Wang

2022

Journal of Alloys and Compounds

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Magnetic and transport properties of inverse Heusler compound Cr2CoAl

Cited by 8 publications

References 32 publications

Phase Equilibria in the Al-Cr-Co System in the Range of Compositions 0-70 at.% Al

Phase Equilibria in the Al-Cr-Co System in the Range of Compositions 0-70 at.% Al

Correlation between Slanted Magnetic Structure and Electromagnetic Responses in the RAlGe (R = Tb and Er) System

Dynamic evolution from positive to negative magnetoresistance of RAlGe (R = Dy, Ho) with disordered orthorhombic structure

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