A-site-disorder-dependent magnetocaloric properties in the mono-valent-metal doped La0.7Ca0.3MnO3 manganites

The Magnetocaloric Effect and Magnetic Refrigeration Near Room Temperature: Materials and Models

“…However, it is worth noting that nonstoichiometric systems likely affect their magnetic properties and could explain the dispersion of the reported data. Several factors apart from compositional changes affect MCE signal: grain size (75)(76)(77), chemical order (78)(79)(80), sintering temperature (81,82), and pressure application (83).…”

The impact of disorder on magnetocaloric properties in Ti-doped manganites of La0.7Sr0.25Na0.05Mn(1−x)TixO3 (0≤x≤0.2)

“…The first origin is the deformation of the MnO 6 octahedral originating from the Jahn-Teller (J-T) effect generated from strong electron-phonon coupling [21,22] which is controlled by the concentration of Mn 3 þ ions. The second origin is the variation of the average ionic radius of the B-site element or B 4 [23]. The tolerance factor (t G ) is widely accepted as a criterion for the formation of a perovskite structure and is used to measure the distortion degree from an ideal cubic.…”

(La0.8Gd0.2)0.85Ag0.15MnO3 Perovskit Manganit Sisteminde Gd Yer Değiştirmesinin Yapısal Manyetik ve Manyetokalorik Özellikleri Üzerine Etkisi

“…Ferromagnetic doubleexchange, antiferromagnetic super-exchange and spin phonon coupling properties are major factors that affect the magnetocaloric properties in manganites [9][10][11][12]. These interactions can be determined from the parameters like mismatch effect [13], oxygen stoichiometry [14], average A site ionic size [15] and doping level [16]. In recent years, La site substitution with various 1+ and 2+ cations have been worked to understand the effect of substitution on the properties given above (5,8) [8].…”