Study of magnetic and specific heat measurements at low temperatures in Nd0.5Sr0.5MnO3, Nd0.5Ca0.5MnO3

Abstract

The magnetization at low temperatures for Nd 0.5 Sr 0.5 MnO 3 and Nd 0.5 Ca 0.5 MnO 3 samples showed a rapid increase with decreasing temperatures, contrary to a La 0.5 Ca 0.5 MnO 3 sample. Specific heat measurement at low temperatures showed a Schottky-like anomaly for the first two samples. However, there is not a straight forward correlation between the intrinsic magnetic moment of the Nd 3+ ions and the Schottky-like anomaly.

Specific heat at low temperatures and magnetic measurements inNd0.5Sr0.5MnOLópez1, Lima2, Lisboa‐Filho3 et al. 2002Phys. Rev. BSelf Cite447190View full textAdd to dashboardCite

“…In a previous report 15 we showed that a two-level-Schottky function ͑only one doublet͒ did not fit properly our experimental data at low temperatures. The same result was verified for all the experimental data presented here.…”

“…We have already reported a short version of preliminary results about these topics. 15 However, as far as we know, detailed specific-heat measurements in these compounds have not been published yet.…”

Specific heat and magnetic properties of Nd0.5Sr0.5MnO3 and R0.5Ca0.5MnO3 (R=Nd, Sm, Dy, and Ho)

“…All of these compounds presented a Schottky-type anomaly at low temperatures. 15,16 Here, we report a general magnetic characterization and specific heat measurements in the full temperature interval, between 2 and 300 K, for the same five samples.…”

Thermal capacity, diffusion, and conductivity of Nd1−x SrxMno3 (x = 0.45 and 0.5) manganites

“…The entropy of the magnetic transition is 1.27 and 2.46 J/(mol⋅K) for Nd 0.5 Sr 0.5 MnO 3 and Nd 0.55 Sr 0.45 MnO 3 , respectively, which makes 10 and 20% of their theoretical values. This testifies to the magnetically biphase state (see also [7]) of the materials under study. It is interesting to note that Sasaki et al [5] observed a well-defined peak of the thermal capacity in the region of the antiferromagnetic-ferromagnetic transition for the Nd 0.5 Sr 0.5 MnO 3 single-crystal sample.…”