Large magnetocaloric effect in Er2O3 compounds at cryogenic temperature

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er2Ir2O7

“…The magnetic hysteresis loop of the Er 2 Ir 2 O 7 sample was recorded at 1.8 K and is shown in figure 3(b). The Er 2 Ir 2 O 7 compound has a strong magnetization and a low coercive field of 20 kOe, resulting in low magnetic hysteresis [31]. The nature of the magnetic phase transition was investigated using the Arrott diagrams (H/M versus M 2 ) (figure 4) according to the Banerjee criteria, when the slope of the Arrott curve is negative, the magnetic transition is considered first order.…”

“…The pyrochlore compound Er 2 Ir 2 O 7 is one material that exhibits interesting magnetic properties. The ions Er 3+ have a total moment of J = 15/2, allowing for a successful antiferromagnetic exchange of Heisenberg's closest neighbour on a pyrochlore lattice [31]. Very interesting low temperature properties have been reported for Er 2 Ir 2 O 7 .…”

Enhanced cryogenic magnetocaloric performance and the existence of short-range magnetic correlations in frustrated diamond geometries

“…In view of the fact that frustration induced by various factors can be an effective way to enhance the MCE, it is relevant to experimentally examine the same in newly discovered frustrated geometries. Further, oxide samples are considered more proficient than alloys for cryogenic magnetic refrigeration due to their insulating nature [14,15]. Additionally, alloys, due to their metallic nature, are disadvantageous owing to eddy current losses during magnetization and demagnetization procedures.…”