Specific heat anomalies inLa1−xSrxMnO3

A. Szewczyk

¹

,

M. Gutowska

²

,

B. Dąbrowski

³

et al.

Helical magnetic state in the distorted triangular lattice ofα-CaCr2O4Chapon1, Manuel2, Damay3 et al. 2011Phys. Rev. B3414530View full textAdd to dashboardCite

“…It this case, the heat capacity is derived from a point-by-point analysis of the time response along each of the two branches. In case of a first-order transition, it is known that the former method can yield spurious results, 16,17 whereas the latter is able to account for both the latent heat and hysteretical features. The crystal structure of α-CaCr 2 O 4 was first reported by Pausch et al 12 .…”

Structural and magnetocaloric effect of Ln 0.67 Sr 0.33 MnO 3 (Ln=La, Pr and Nd) nanoparticles

“…For the La 1 À x Sr x MnO 3 manganites, the Curie temperature is tunable between 197 and 370 K when the Sr concentration changes between 0.13 and 0.33 [12][13][14][15][16][17][18]. The maximum isothermal entropy change (ΔS T ) was found to be 7.9 J/kg K for a field change of 7 T in the single crystalline compound with x=0.2 [18].…”

“…For the La 1 À x Sr x MnO 3 manganites, the Curie temperature is tunable between 197 and 370 K when the Sr concentration changes between 0.13 and 0.33 [12][13][14][15][16][17][18]. The maximum isothermal entropy change (ΔS T ) was found to be 7.9 J/kg K for a field change of 7 T in the single crystalline compound with x=0.2 [18]. Phan et al [19] reported the MCE of single crystal Pr 0.63 Sr 0.37 MnO 3 , which underwent a magnetic transition around 300 K. The maximum values of ΔS T and adiabatic temperature change (ΔT S ) were found to be 8.52 J/kg K and 5.65 K, respectively, for an applied field change of 5 T [19].…”

Теплофизические свойства монокристалла La-=SUB=-0.825-=/SUB=-Sr-=SUB=-0.175-=/SUB=-MnO-=SUB=-3-=/SUB=-

“…При этом в полях 40 kOe нет полного подавления ано-малии. Аналогичное поведение теплоемкости близких составов наблюдалось в работах [12,14].…”