Near room temperature magnetocaloric effect of Cr1−xRuxO2 (x = 0.000, 0.125, and 0.250) for magnetic refrigeration

Elouafi, A.; Ouahbi, S. El; Ezairi, Sara; Lassri, M.; Tizliouine, A.; Lassri, H.

doi:10.1140/epjp/s13360-022-03646-y

Cited by 7 publications

(1 citation statement)

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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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