Magnetic properties and magnetocaloric effect in the rare earth-rich phases RE4PtMg (RE = Ho and Er)

Magnetocaloric properties of cluster glass compound Pr2Ni0.95Si2.95

“…The maximum value of ∆T ad has been found to be 3.85 K for 70 kOe magnetic field change and in the same range to that for Pr 5 Ni 1.9 Si 3 (3.4 K for ∆H = 75 kOe) [29], EuAuZn (3.8 K for ∆H = 50 kOe) [36], Ho 4 PtMg (5.3 K for ∆H = 70 kOe) [37], NdRu 2 Ge 2 (2.7 K for ∆H = 50 kOe) [38], etc in the low temperature region. Similar to −∆S M (T), the behaviour of ∆T ad (T) is also asymmetric over the maximum value and the maximum change is also observed at much higher temperature than the spin freezing temperature for the compound.…”

Large Magnetocaloric Effect with a Wide Working Temperature Span in the Intermetallic Compound Nd4PtMg

“…The thermal hysteresis cannot be observed between ZFC and FC -T curve on and over the Curie temperature T c . In the same fashion it is observed that some of the rare earth inter-metallic materials, such as RE 4 PtMg [20], REAgAl [21] and so on, the thermo-magnetic irreversibility in the present Nd 4 PtMg is due to the domain wall pinning effects. The magnetic entropy change ΔS M was calculated from the temperature and field dependence of the magnetization M(H,T) using the Maxwell's thermodynamic relation.…”

Review of magnetic properties and magnetocaloric effect in the intermetallic compounds of rare earth with low boiling point metals

“…Recently, we have reported the magnetic properties and MCE of RE 4 PdMg (RE = Eu and Er) and RE 4 PtMg (RE = Ho and Er). [66][67][68] The magnetic phase transition, the origin of the MCE and its potential application for magnetic refrigeration of these compounds will be shown as below. 4 PdMg under H = 1 T. We can note that M increases continuously with decreasing temperature, and dM/dT shows a table-like behaviour from 20 to 150 K. [66] Fig .…”

“…[62][63][64][65] For this type of crystal structure, there are three crystallographically independent RE sites and the rare structural motif of Mg (RE = Ho and Er). [66][67][68] The magnetic phase transition, the origin of the MCE and its potential application for magnetic refrigeration of these compounds will be shown as below. (left scale) and dM FC /dT (right scale) for Eu 4 PdMg under H = 1 T. We can note that M increases continuously with decreasing temperature, and dM/dT shows a table-like behaviour from 20 to 150 K. [66] Fig.…”

“…[66] Very recently, the magnetic properties and the MCE in Ho 4 PtMg, Er 4 PdMg, and Er 4 PtMg compounds have been investigated by magnetization and heat capacity measurements. [67][68] The compounds undergo a second order magnetic phase transition from a PM to FM state at Curie 3 K, to be 1.7, 3.7 and 5.5 K, and to be 2.2, 5.0 and 6.5 K, respectively. The values for the presently studied compounds are comparable or even larger than some of the potential promising magnetic refrigerant materials in the similar temperature region, classifying them as considerable candidates for low temperature magnetic refrigeration.…”