Magnetic entropy change in polycrystalline La1−xKxMnO3 perovskites

Detailed discrimination of the order of magnetic transitions and magnetocaloric effect in pure and pseudobinary Co Laves phases

“…This criterion has been recently used to study a broad number of systems, both in applied physics research as for the analysis of magnetocaloric materials (manganese oxides [13][14][15][16][17], alloys [18,19] or chromium oxides [20,21]) and in basic investigations (cobaltites [22], manganites [10,23], pyrochlores [24], or alloys [25,26]). …”

Effect of potassium doping on physical properties of perovskites La0.8Cd0.2−xKxMnO3

“…With an increasing K content, the fraction of Mn 4+ increases, which leads to a reduction of the Mn 3+ /Mn 4+ ratio. However, the strong spin-lattice coupling arising from a reasonable variation in Mn O bond distances and Mn O Mn bond angles at T C may also contribute to the enhancement of magnetic change [17] observed.…”

“…monovalent substitution (A is Na, K, Ag, etc.) is limited to x = 0.20 [16,17], we have studied the structural, magnetic, electrical and magnetocaloric properties of La 0.8 Cd 0.2−x K x MnO 3 compounds for 0.05 ≤ x ≤ 0.1…”

Magnetocaloric effect above room temperature in the K-doped La0.8Na0.2−xKxMnO3 manganites

“…Furthermore, the study of magnetocaloric properties in La 1−x K x MnO 3 compounds synthesized by sol gel method has shown an enhancement in both T C and | S Max M | values reaching respectively 344 K and 2.19 J/kg K under 1.5 T for x = 0.2 sample [19]. More recently, Das and Dey have observed similar behavior in La 1−x K x MnO 3 compounds synthesized by pyrophoric method with | S Max M | = 3 J/kg K under 1 T for x = 0.15 [20].…”