Spin-glass-like behavior and magnetocaloric properties in LaBiCaMn2O7 layered perovskite

Elouafi, A.; Ounza, Y.; Omari, L.H.; Oubla, M.; Lassri, M.; Sajieddine, M.; Lassri, H.

doi:10.1007/s00339-021-04358-3

Cited by 14 publications

(2 citation statements)

References 36 publications

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“…Among various magnetic materials, transition metal oxides, particularly perovskites, have drawn significant attention for their remarkable magnetocaloric properties and potential for practical applications [4][5][6]. One class of perovskites, the Ruddlesden-Popper (R-P) phases, has recently gained prominence in the field of magnetocaloric research due to their unique double layer crystal structure and tunable magnetic properties [7][8][9]. In particular, the La 1.4 Sr 1.6 Mn 2 O 7 perovskite has shown significant promise for magnetocaloric applications owing to its metamagnetization, Curie temperature near room temperature and table like entropy change [10,11].…”

Section: Introductionmentioning

confidence: 99%

Evidence of a Large Refrigerant Capacity in Nb-Modified La1.4Sr1.6Mn2−xNbxO7 (0.0 ≤ x ≤ 0.15) Layered Perovskites

Kumar,

Kim,

Sharma

et al. 2024

Magnetochemistry

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In this work, evidence of isothermal magnetic entropy change (∆SM) over a broad temperature region is presented in a series of La1.4Sr1.6Mn2−xNbxO7 Ruddlesden–Popper compounds with niobium modification (Nb) (0.0 ≤ x ≤ 0.15) at the manganese (Mn) site. The ceramic samples were obtained through a solid-state sintering method in optimized conditions. All compounds predominantly possessed Ruddlesden–Popper phase while a few additional reflections were resolved in Nb-doped compounds which indicates the separation of structural phases. These peaks are assigned to a separate layered perovskite and single perovskite with tetragonal symmetry and hexagonal symmetry, respectively. The microstructure of the pure sample reveals uniform grain morphology but in Nb-doped specimens chiefly three types of grains were found. It was assumed that the inter-connected large particles were of R-P phase which is dominant in both parent and x = 0.05 compounds, while the hexagonal and polygonal morphology of grains in higher concentrations of dopants directly corroborates with the symmetry of single perovskite and additional layered perovskite phases, respectively. The parent compound exhibits a single ∆SM curve, whereas all Nb-substituted samples display bifurcated ∆SM curves. This indicated two transition regions with multiple magnetic components, attributed to distinct structural phases. The highest ∆SM values obtained for components corresponding to the R-P phase are 2.32 Jkg−1k−1, 0.75 Jkg−1k−1, 0.58 Jkg−1k−1 and 0.43 Jkg−1k−1 and for the second component located around room temperature are 0.0 Jkg−1k−1, 0.2 Jkg−1k−1, 0.28 Jkg−1k−1 and 0.35 Jkg−1k−1 for x = 0.0, 0.05, 0.10 and 0.15 compositions, respectively, at 2.5 T. Due to the collective participation of both components the ∆SM was expanded through a broad temperature range upon Nb doping.

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Section: Introductionmentioning

confidence: 99%

Evidence of a Large Refrigerant Capacity in Nb-Modified La1.4Sr1.6Mn2−xNbxO7 (0.0 ≤ x ≤ 0.15) Layered Perovskites

Kumar,

Kim,

Sharma

et al. 2024

Magnetochemistry

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“…The magnetocaloric effect of materials has been widely investigated experimentally and theoretically in order to better understand the fundamental physical properties of these materials [9][10][11][12][13][14][15][16][17][18]. According to the literature, materials with a high capacity for refrigerating (RCP) at low temperatures are preferred, particularly in spatial sciences, industrial refrigeration, and the liquefaction industry [19][20][21][22][23][24]. Pyrochlore iridates of formula A 2 B 2 O 7 (A= rare Earth elements; and B= Ir) are one of the materials with a significant magnetic frustration owing to Coulomb correlation and spin-orbit coupling [25][26][27].…”

Section: Introductionmentioning

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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Critical behavior of LaBiCaMn2O7 and its relation with magnetocaloric effect

et al. 2023

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Spin-glass-like behavior and magnetocaloric properties in LaBiCaMn2O7 layered perovskite

Cited by 14 publications

References 36 publications

Evidence of a Large Refrigerant Capacity in Nb-Modified La1.4Sr1.6Mn2−xNbxO7 (0.0 ≤ x ≤ 0.15) Layered Perovskites

Evidence of a Large Refrigerant Capacity in Nb-Modified La1.4Sr1.6Mn2−xNbxO7 (0.0 ≤ x ≤ 0.15) Layered Perovskites

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er₂Ir₂O₇

Critical behavior of LaBiCaMn2O7 and its relation with magnetocaloric effect

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Spin-glass-like behavior and magnetocaloric properties in LaBiCaMn2O7 layered perovskite

Cited by 14 publications

References 36 publications

Evidence of a Large Refrigerant Capacity in Nb-Modified La1.4Sr1.6Mn2−xNbxO7 (0.0 ≤ x ≤ 0.15) Layered Perovskites

Evidence of a Large Refrigerant Capacity in Nb-Modified La1.4Sr1.6Mn2−xNbxO7 (0.0 ≤ x ≤ 0.15) Layered Perovskites

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er2Ir2O7

Critical behavior of LaBiCaMn2O7 and its relation with magnetocaloric effect

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Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er₂Ir₂O₇