Large reversible magnetocaloric effect in Er3Co compound

Abstract

Magnetic and magnetocaloric properties of the intermetallic compound Er 3 Co have been studied. Temperature dependence of magnetization data shows that it exhibits ferromagneticlike bulk magnetic ordering at 14 K. For field changes ͑⌬H͒ of 20 and 50 kOe, the maximum values of isothermal magnetic entropy change are found to be 9 and 17 J/kg K, respectively. For ⌬H = 20 and 50 kOe, the relative cooling powers are found to be 140 and 450 J/kg, respectively. At temperatures above T ord , the spin fluctuations are found to affect the magnetocaloric properties of Er 3 Co.

Magnetic property and magnetocaloric effect in TmCoAl compound

“…Moreover, the ÀDS M does not die out even at temperatures well above T C , possibly due to the presence of spin fluctuations [28]. The RC is considered to be another important requirement of a potential magnetic refrigerant, which is a measure of how much heat can be transferred between the cold and hot sinks in one ideal refrigerant cycle [34].…”

Crystallographic and magnetic descriptions of a novel erbium rich aluminide: Er10Co1+xAl3−x (x = 0.30)

“…This two step ordering is confirmed by the ac-magnetization measurements ( fig. 4(b)) M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 8 showing a peak at T N = 12.9(3) K followed by an increase below T = 6(1) K, which may anticipate a transition below 2 K, on the M' component, while the M'' component remains almost flat with minute values (not shown here for clarity). A third tiny anomaly is seen at T = 8.5(10) K and can be attributed (i) whether to the complex ordering of the presently studied compound or (ii) to the ordering of the impurity phase or to traces of erbium oxides.…”

“…This is the case for the Er-rich compounds Er 3 Ni 2 [5], Er 3 Ir [6] or Er 3 Co [7,8] presenting interesting MCE features at low temperature. Such behaviors motivated us to investigate some ternary Er-T-X (T = transition metal; X = p-block element) systems (e.g.…”

Magnetocaloric effect in rare-earth intermetallics: Recent trends

“…Similarly, the observation of unusual and large MCE in the Dy 2 Al compound is attributed to competing large magnetocrystalline anisotropy [45]. Also, recently R 3 Co (R = heavy rare earth including Tm) compounds of Fe 3 C-type orthorhombic structure have been well characterized for their interesting MCE behaviour that is expected to originate from the influence of the low symmetry crystalline electric field [46,47]. While the Er 3 Co compound shows large reversible MCE centred at its ferromagnetic ordering temperature of 14 K, Tm 3 Co compound undergoes a ferromagnetic order at ∼6.5 K that is closely spaced to the antiferromagnetic ordering that happens at ∼4.5 K. Interestingly, Tm 3 Co does not show any thermal or magnetic hysteresis loss near the first-order metamagnetic transition making it a prospective material for low-temperature magnetic refrigeration applications.…”