Influence of barium substitution on the physical, thermal, optical and luminescence properties of Sm-doped metaphosphate glasses for reddish orange light applications.

Our present study focuses on examining the thermal, structural and luminescent characteristics of sodium barium metaphosphate glasses doped with Sm. Glass samples with molar compositions (100 - )[(50PO)-(50-NaO)-(BaO)]-SmO, where = 20, 25, 30, 35, 40 and = 0.3 and 1% were first synthesized by conventional melt quenching and later dehydroxylated under a constant N flow to ensure final glasses with a very high degree of chemical and optical homogeneity and free of water.

Magnetocaloric effect and critical behavior of the LaCaNaMnO compound.

In this paper, we have studied the critical behavior and the magnetocaloric effect (MCE) simulation for the LaCaNaMnO (LCNMO) compound at the second order ferromagnetic-paramagnetic phase transition. The optimized critical exponents, based on the Kouvel-Fisher method, were found to be: = 0.48 and = 1.

Critical behavior near room temperature in LaCaNaMnO sample.

The critical behavior of LaCaNaMnO was studied at around room temperature magnetization measurements. From the relative slope, we deduced that the Tricritical Mean-Field model was the most suitable model. The estimated critical exponents were found to be = 0.

Large magnetocaloric entropy change at room temperature in soft ferromagnetic manganites.

In this paper, LaCa Na MnO ( = 0.15 and 0.20) samples were prepared by the flux method.