Structural, magnetic, magnetocaloric properties and critical behavior of La0.62Nd0.05Ba0.33MnO3 elaborated by co-precipitation process

Tillaoui, S.; Boubekri, A.; Essoumhi, A.; Sajieddine, M.; Hlil, E. K.; Moubah, R.; Sahlaoui, M.; Razouk, A.; Lassri, H.

doi:10.1016/j.mseb.2021.115052

Cited by 9 publications

(9 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…55 The RCP is expressed as RCP = |Δ S max M | × δ T FWHM , where δ T FWHM is full width at half maximum of −Δ S M ( T ) curves. 56 The variation of RCP with the magnetic field near T C / T N is presented in Fig. 6e.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

High-pressure synthesis, spin-glass behaviour, and magnetocaloric effects in Fe_xTi₂S₄ heideite sulphides

et al. 2022

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

“…This journal is © The Royal Society of Chemistry 2022 dT FWHM is full width at half maximum of ÀDS M (T) curves. 56 The variation of RCP with the magnetic field near T C /T N is presented in Fig. 6e.…”

Section: Discussionmentioning

confidence: 99%

High-pressure synthesis, spin-glass behaviour, and magnetocaloric effects in Fe_xTi₂S₄ heideite sulphides

et al. 2022

View full text Add to dashboard Cite

show abstract

“…On the other hand, for discrete magnetization measurements, Δ S M can be approximately calculated as: normalΔ S normalM ( T , H 0 ) = prefix∑ i M i + 1 − M i T i + 1 − T i normalΔ H i where M i and M i + 1 are the experimental data obtained at temperatures T i and T i + 1 , under a magnetic field H i , respectively. , The results of −Δ S M ( T ) curves for GdSrCoFeO 6 sample under several typical Δ H up to 7 T are illustrated in Figure a. All curves show positive values in the entire measured temperature range; they rise progressively with decreasing temperature and increase gradually with increasing Δ H , in agreement with the usual MCE behavior.…”

Section: Resultsmentioning

confidence: 99%

Magnetoelastic Coupling and Cryogenic Magnetocaloric Effect in Two-Site Disordered GdSrCoFeO₆ Double Perovskite

et al. 2023

View full text Add to dashboard Cite

The development of new magnetic refrigerants demands an effective investigation of materials with a large magnetocaloric effect in a wide temperature range. Herein, we report on the structural, magnetic, and magnetocaloric properties of the two-site disordered double perovskite GdSrCoFeO 6 prepared by the modified solid-state synthesis method. Temperature-dependent synchrotron X-ray diffraction analysis revealed that GdSrCoFeO 6 crystallizes in the orthorhombic phase (Pnma), with Gd 3+ /Sr 2+ and Co 2+/3+ /Fe 3+/4+ ions randomly distributed on the A-and B-sites, respectively. An observed lattice parameter anomaly around 60 K indicates the occurrence of the magnetoelastic coupling, which coincides with the presence of ferro/ferrimagnetic (FM/FiM) ordering below T C ≈ 65 K from the magnetic measurements. These results match well with our first-principles calculation prediction of low-temperature magnetic (FM/FiM) and electronic (insulating/metal) transitions related to a combined effect of Co and Fe shortand long-range competitions, crossings of spin state at Co ions, and the hybridization degree between Gd-4f and Co-3d states. Additionally, a modified Arrott plot and Kouvel−Fisher analysis were used to establish the nature of the magnetic phase transition in GdSrCoFeO 6 , yielding the critical exponent β = 1.46(6)/1.45(6), γ = 1.48(5)/1.17(2), and δ = 2.01(3)/1.80(5), respectively. The specific heat analysis reveals two well-defined broad peaks (∼10 and ∼70 K), which match well with a Schottky anomaly (Gd-4f) and the magnetic transition of FM/FiM to paramagnetic order, respectively. The magnetocaloric effect (MCE) analysis reveals a maximum magnetic entropy change ΔS M max ≈ 13 J kg −1 K −1 (at ∼8 K) under a field of 0−7 T. These results evidence that the Schottky anomaly and the magnetoelastic coupling seem to be key factors for driving further enhancements to the MCE in GdSrCoFeO 6 , making it a possible candidate for cryogenic applications.

show abstract

“…The effectiveness of magnetic refrigeration was probed through the relative cooling power (RCP) parameter, , which is defined by RCP = | Δ S normalM max | normalΔ δ T FWHM where δ T fwhm is the full width at half-maximum of −Δ S M ( T ) curves. In Figure g, the RCP magnetic field dependence is represented together with their best fit using power-law RCP ≈ μ 0 H m .…”

Section: Discussionmentioning

confidence: 99%

“…Effectiveness of Magnetic Refrigeration. The effectiveness of magnetic refrigeration was probed through the relative cooling power (RCP) parameter, 57,58 which is defined by…”

Section: Discussionmentioning

confidence: 99%

Magnetoelastic Coupling Evidence by Anisotropic Crossed Thermal Expansion in Magnetocaloric RSrCoFeO₆ (R = Sm, Eu) Double Perovskites

Silva,

Rodrigues,

Gainza

et al. 2024

Inorg. Chem.

View full text Add to dashboard Cite

Double perovskite oxides, characterized by their tunable magnetic properties and robust interconnection between the lattice and magnetic degrees of freedom, present an enticing foundation for advanced magnetic refrigeration materials. Herein, we delve into the influence of rare-earth elements on RSrCoFeO 6 (R = Sm, Eu) disordered double perovskites by examining their structural, electronic, magnetic, and magnetocaloric properties. Temperature-dependent synchrotron X-ray diffraction analysis confirmed the stability of the orthorhombic phase (Pnma) across a wide temperature range. X-ray photoemission spectroscopy revealed that both Sm and Eu are in the 3+ state, whereas multiple states for Co 2+/3+ and Fe 3+/4+ are identified. The magnetic investigation and magnetocaloric effect (MCE) analysis brought to light the presence of a long-range antiferromagnetic (AFM) order with a second-order phase transition (SOPT) in both samples. The maximum magnetic entropy change ΔS M max was approximately 0.9 J/kg K for both samples at applied field 0−7 T, manifesting prominently above Neel temperatures T N ≈ 93 K (Sm) and 84 K (Eu). Nevertheless, different relative cooling powers (RCP) of 112.6 J/kg (Sm) and 95.5 J/kg (Eu) were observed. A detailed analysis of the temperature-dependent lattice parameters shed light on a distinct magnetocaloric effect across the magnetic transition temperature, unveiling an anisotropic thermal expansion [α V = 1.41 × 10 −5 K −1 (Sm) and α V = 1.54 × 10 −5 K −1 (Eu)] wherein the thermal expansion axial ratio α b Sm /α b Eu = 0.61 became lower with increasing temperature, which suggests that the Eu sample experiences a greater thermal expansion in the b-axis direction. At the atomic bonding level, the evidence for magnetoelastic coupling around the magnetic transition temperatures T N was found through the anomalies along the average Co/Fe−O bond distance, formal valence, octahedral distortion, as well as an anisotropic lattice expansion.

show abstract

Structural, magnetic, magnetocaloric properties and critical behavior of La0.62Nd0.05Ba0.33MnO3 elaborated by co-precipitation process

Cited by 9 publications

References 39 publications

High-pressure synthesis, spin-glass behaviour, and magnetocaloric effects in Fe_xTi₂S₄ heideite sulphides

High-pressure synthesis, spin-glass behaviour, and magnetocaloric effects in Fe_xTi₂S₄ heideite sulphides

Magnetoelastic Coupling and Cryogenic Magnetocaloric Effect in Two-Site Disordered GdSrCoFeO₆ Double Perovskite

Magnetoelastic Coupling Evidence by Anisotropic Crossed Thermal Expansion in Magnetocaloric RSrCoFeO₆ (R = Sm, Eu) Double Perovskites

Contact Info

Product

Resources

About

Structural, magnetic, magnetocaloric properties and critical behavior of La0.62Nd0.05Ba0.33MnO3 elaborated by co-precipitation process

Cited by 9 publications

References 39 publications

High-pressure synthesis, spin-glass behaviour, and magnetocaloric effects in FexTi2S4 heideite sulphides

High-pressure synthesis, spin-glass behaviour, and magnetocaloric effects in FexTi2S4 heideite sulphides

Magnetoelastic Coupling and Cryogenic Magnetocaloric Effect in Two-Site Disordered GdSrCoFeO6 Double Perovskite

Magnetoelastic Coupling Evidence by Anisotropic Crossed Thermal Expansion in Magnetocaloric RSrCoFeO6 (R = Sm, Eu) Double Perovskites

Contact Info

Product

Resources

About

High-pressure synthesis, spin-glass behaviour, and magnetocaloric effects in Fe_xTi₂S₄ heideite sulphides

High-pressure synthesis, spin-glass behaviour, and magnetocaloric effects in Fe_xTi₂S₄ heideite sulphides

Magnetoelastic Coupling and Cryogenic Magnetocaloric Effect in Two-Site Disordered GdSrCoFeO₆ Double Perovskite

Magnetoelastic Coupling Evidence by Anisotropic Crossed Thermal Expansion in Magnetocaloric RSrCoFeO₆ (R = Sm, Eu) Double Perovskites