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

Effect of Ba substitution on structural, electrical and thermal properties of La0.65Ca0.35−Ba MnO3 (0 ⩽x⩽ 0.25) manganites

“…Recent studies demonstrate that the mixed valence perovskite manganites exhibit a large magneto-caloric effect (MCE) which is seen around the magnetic ordering temperature which has an obvious application in magnetic refrigeration [6][7][8][9][10]. Giri et al [9] have reported that MCE and relative cooling power (RCP) can be tuned by varying the particle size.…”

Structural, magnetic and magnetocaloric properties of K-doped Pr0.8Na0.2−xKxMnO3 manganites

“…Even at lower temperatures, the magnetic refrigeration still have drawn attention [7,8,37,38].The MCE is intrinsic to magnetic materials and is induced by the coupling of magnetic sub-lattices with an external magnetic field. The manganites with Ln 1-x X x MnO 3 formula (Ln: a trivalent rare-earth ion; X: a monovalent alkaline or divalent alkaline-earth ion) are typical MCE materials and have been the subject of intense investigation last years due to their wide range of properties such as magnetocaloric effect (MCE) [9][10][11][12][13]. The MCE is characterized by the magnetic entropy change, -∆S M , and the adiabatic temperature change, ∆T, upon magnetic field variations.…”

Studies on magneto-resistance, magnetization and thermoelectric power of Cr substituted La0.65Ca0.35Mn1−xCrxO3 (0≤x≤0.07) manganites

“…The interest in these compounds enhanced because of the unusual discovery of colossal magneto-resistance (CMR) [2][3][4] and thermal property like magneto caloric effect (MCE) [5][6][7][8][9] observed near the magnetic transition (ferromagnetic to paramagnetic state) around a critical temperature called Curie temperature (T C ). The primary aim of these studies was to understand the mechanism responsible for these phenomena for possible applications.…”