Spin wave, optical and electrical transport studies of double perovskite Ho2CoMnO6 nanoparticles

Oujihi, O. El; Elouafi, A.; Tizliouine, A.; Omari, L.H.; Salhi, H.

doi:10.1016/j.ssc.2020.114079

Cited by 12 publications

(3 citation statements)

References 30 publications

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“…The MCE parameter by magnetic entropy change DS M has been related to the isothermal magnetization, determined at various magnetic fields and temperatures (figure 3(a)). According to thermodynamic theory, DS M is related to magnetic field change as follows [44]: According to the thermodynamics Maxwell's relation [45][46][47]:…”

Section: Resultsmentioning

confidence: 99%

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er₂Ir₂O₇

et al. 2023

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The structural, morphological, magnetic and magnetocaloric properties of Er2Ir2O7 are investigated. The X-ray diffraction analysis showed that Er2Ir2O7 has a cubic structure with the Fđ3m space group. Using Williamson-Hall (W-H) plot, the crystallite size was found to be smaller than that obtained from the SEM image. Magnetic measurements revealed a weak ferromagnetic transition at TC =140K, caused by the appearance of magnetic order of the Ir moments. ΔT (temperature at full width of half maxima) was estimated to be 27K and 40K for magnetic field changes of 40 kOe and 50 kOe, corresponding to the relative cooling power (RCP) values of 98 J/kg and 128 J/kg, respectively. Temperature-averaged Entropy Change (TEC) was calculated for all applied magnetic fields, and found to be slightly lower than (-∆S_M^max) values, indicating less hysteresis loss in the compound Er2Ir2O7 during the magnetic transition. This study provides a new pyrochlore material for MCE magnetocaloric applications.

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Section: Resultsmentioning

confidence: 99%

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er₂Ir₂O₇

et al. 2023

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“…One of the most important studies that summarized the double perovskite compounds was that done by Ivanov et al [6] about the effect of temperature on the structural and magnetic properties of R 2 MMnO 6 (R = Dy, Gd; M = Ni, Co) compounds using x-ray powder diffraction (XRD) and squid magnetometry. Also, Oujihi et al [7] presented an experimental study of the compound Ho 2 CoMnO 6 using the XRD technique, in which he showed that the optical absorption is obtained around 590 nm with direct optical bandgap energy equal to 2.37 eV which confirms the semiconducting behavior for this material. In addition, the magnetization-temperature dependence curve of Ho 2 CoMnO 6 exhibits ferromagnetic features at low temperatures and purely paramagnetic at high temperatures.…”

Section: Introductionmentioning

confidence: 93%

DFT-based investigation of electronic-structure, magnetic and thermoelectric properties of Dy₂CoMnO₆ double perovskite

et al. 2023

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The density functional theory as a computational approach was used to explore the ferrimagnetic semiconducting behavior of Dy2CoMnO6 double perovskite compound in both spin-up and spin-down directions. Thermodynamic stability was confirmed in a wide pressure range set to 30 GPa. Both scalar and full relativistic calculations are used to estimate the spin-orbit effect. The topological distribution of the charge density and the net effective charge of each atom are studied based on the Quantum Theory of Atoms in Molecules (QTAIM) as implemented in Bader code, Besides this, the different QTAIM atomic basins descriptors such as electron density ρ_b, Laplacian of the electron density ∇^2 ρ_b, potential electronic energy density V_b, kinetic electronic energy density G_b and density of the total electronic energy H_b at bond critical points (BCPs) are estimated using CRITIC2 software where the ionic type for Dy-O, Co-O, and Mn-O bonds are evaluated. Holes and electrons have different effective masses, their thermoelectric properties appear high figure of merit (ZT) exceeding 0.5 for temperatures greater than 500 K in the negative chemical potential region, suggesting that doping with holes might be more favorable for thermoelectric efficiency than doping with electrons.

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“…The chemical morphology of all samples was analyzed using scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) techniques (The FEI Quanta450 FEG environmental scanning electron microscope (ESEM)) [16][17][18].…”

Section: Scanning Electron Microscopy (Sem) and Energy Dispersive X-r...mentioning

confidence: 99%

Structural, Morphological and Mechanical Properties of Concrete Slab in Traditional Buildings in Casablanca, Morocco

Soumadrass,

Beidouri,

Zarbane

2023

Asec 2023

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Spin wave, optical and electrical transport studies of double perovskite Ho2CoMnO6 nanoparticles

Cited by 12 publications

References 30 publications

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er₂Ir₂O₇

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er₂Ir₂O₇

DFT-based investigation of electronic-structure, magnetic and thermoelectric properties of Dy₂CoMnO₆ double perovskite

Structural, Morphological and Mechanical Properties of Concrete Slab in Traditional Buildings in Casablanca, Morocco

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Spin wave, optical and electrical transport studies of double perovskite Ho2CoMnO6 nanoparticles

Cited by 12 publications

References 30 publications

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er2Ir2O7

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er2Ir2O7

DFT-based investigation of electronic-structure, magnetic and thermoelectric properties of Dy2CoMnO6 double perovskite

Structural, Morphological and Mechanical Properties of Concrete Slab in Traditional Buildings in Casablanca, Morocco

Contact Info

Product

Resources

About

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er₂Ir₂O₇

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er₂Ir₂O₇

DFT-based investigation of electronic-structure, magnetic and thermoelectric properties of Dy₂CoMnO₆ double perovskite