On the origin of the giant magnetocaloric effect in HoMn2O5 single crystals: First principles study and Monte Carlo simulations

Bouhani, Hamza; Endichi, A.; Zaari, H.; Benyoussef, A.; Hamedoun, M.; Ballı, M.; Kenz, A. El; Mounkachi, O.

doi:10.1016/j.matchemphys.2019.04.044

Cited by 9 publications

(3 citation statements)

References 19 publications

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“…; Dy in DyAl 2 [275], DySb [263], DyNi 2 B 2 C [250], Dy 0.9 Tm 0.1 Ni 2 B 2 C superconductor [272], DyNiSi [181], DyCuSi [266], DyFeO 3 [199], DyCrO 4 [230], DyVO 4 [209], etc. ; Ho in thin Ho films [248], HoMn 2 O 5 [127,221], Ho 3 Al 2 [237], HoCuAl [224], Ho 12 Co 7 [223], HoCoGe [166], HoCoSi [235], HoCuSi [268], HoGa [267], Ho 2 PdSi 3 [194], Ho 5 Pd 2 [187], amorphous HoErGdCuNi [112], etc. ; Er in ErNiBC [243], ErCr 2 Si 2 [244], ErMn 2 Si 2 [242], ErRu 2 Si 2 [286], ErRuSi [234], Er 2 Mn 2 O 7 [164], ErK(MoO 4 ) 2 [188], amorphous Er x Co 1−x [220], etc.…”

Section: ∆S T T C (K) ∆T S (K)mentioning

confidence: 99%

Viable Materials with a Giant Magnetocaloric Effect

Zarkevich

Zverev

2020

Crystals

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This review of the current state of magnetocalorics is focused on materials exhibiting a giant magnetocaloric response near room temperature. To be economically viable for industrial applications and mass production, materials should have desired useful properties at a reasonable cost and should be safe for humans and the environment during manufacturing, handling, operational use, and after disposal. The discovery of novel materials is followed by a gradual improvement of properties by compositional adjustment and thermal or mechanical treatment. Consequently, with time, good materials become inferior to the best. There are several known classes of inexpensive materials with a giant magnetocaloric effect, and the search continues.

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Section: ∆S T T C (K) ∆T S (K)mentioning

confidence: 99%

Viable Materials with a Giant Magnetocaloric Effect

Zarkevich

Zverev

2020

Crystals

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“…[1] and [31]. [32] In TbMn2O5 compound, giant magnetocrystalline anisotropy is remarked where the magnetization tends to orient preferentially along the a-axis [1,31] (along the b-axis for HoMn2O5 [33]). As mentioned before, the DFT calculations using xdipan program enabled us to determine the minimal energy corresponding to the easy-axis of magnetization.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Electronic and magnetic properties of the multiferroic TbMn2O5

et al. 2020

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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“…HMO gave the series of complex phase transition due to long range ordering in Ho 3+ moments and also by coexistence of the Mn 3+ and Mn 4+ [9]. Moreover, giant magneto caloric effect in HMO has been identified by using the first principles study and Monte-Carlo simulations [12]. However, no information on the behavior of polycrystalline HMO at high temperatures has been published.…”

Section: Introductionmentioning

confidence: 99%

Structural and spectroscopic analysis of HoMn₂O₅ multiferroics

Ahmad

Afzal²,

Nissar³

et al. 2022

Phys. Scr.

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HoMn2O5was synthesized by sol-gel auto combustion method and analyzed through x-ray diffraction, Fourier transform infrared reflectivity, Raman, UV-visible, Photoluminescence spectroscopies at room temperature and transport properties (applying dc- and ac- electric field) at high temperatures. Structural characterizations revealed single-phase nature and the analysis confirms the crystal structure by Rietveld refinement with orthorhombic symmetry (space group Pbnm). Both Scherer formula and Williamson-Hall analysis have been used to estimate the average grain size; the results come in good agreement. The reflectivity spectrum was fitted by the Lorentz oscillator model to account for the infrared active optical phonons. The Raman spectrum was measured in unpolarized geometry using a 514 nm laser excitation source, which confirmed its orthorhombic crystal structure. UV-visible spectroscopy demonstrated the electronic structure and semiconducting behavior of sample with an estimated bandgap of 1.54 eV. PL spectrum suggested its electronic transition and vibrations of Mn-O bonds. The conduction mechanism was investigated by measuring electrical resistivity in temperature range (293-473K) by two probe method. Dielectric properties have been discussed in terms of variation in dielectric constant, tangent loss, and conductivity as a function of temperature and frequency.

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On the origin of the giant magnetocaloric effect in HoMn2O5 single crystals: First principles study and Monte Carlo simulations

Cited by 9 publications

References 19 publications

Viable Materials with a Giant Magnetocaloric Effect

Viable Materials with a Giant Magnetocaloric Effect

Electronic and magnetic properties of the multiferroic TbMn2O5

Structural and spectroscopic analysis of HoMn₂O₅ multiferroics

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On the origin of the giant magnetocaloric effect in HoMn2O5 single crystals: First principles study and Monte Carlo simulations

Cited by 9 publications

References 19 publications

Viable Materials with a Giant Magnetocaloric Effect

Viable Materials with a Giant Magnetocaloric Effect

Electronic and magnetic properties of the multiferroic TbMn2O5

Structural and spectroscopic analysis of HoMn2O5 multiferroics

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Product

Resources

About

Structural and spectroscopic analysis of HoMn₂O₅ multiferroics