SinoXivThe heat capacity, thermodynamic functions, and magnetic properties of barium-lanthanum-samarium tungstates
Abstract
Samarium-doped barium and lanthanum tungstates of the composition Ba(La1−xSmx)2WO7 were obtained by solid-phase synthesis at x = 0.01 and 0.03. X-ray analysis revealed that the samples are single-phase and isostructural with BaLa2WO7 (monoclinic syngony, P1121/b), with increasing Sm content leading to only minor changes in the unit cell parameters. Calorimetric studies in the range of 4.2–320 K revealed the low-temperature heat capacity anomalies associated with thermal population of the Stark levels of samarium ions in the CEF structure of the compound. Magnetic properties measurements in the range of 2–400 K allowed identifying the temperature dependence of the effective magnetic moment of paramagnetic Sm3+ atoms in the diamagnetic matrix BaLa2WO7 and showed paramagnetic behavior of the samples with the presence of a temperature-independent contribution of Van Vleck paramagnetism to the magnetic susceptibility.
Citation Information
@article{mirarbissengaliyeva2026,
title={The heat capacity, thermodynamic functions, and magnetic properties of barium-lanthanum-samarium tungstates},
author={Mira R. Bissengaliyeva and Irina A. Zvereva and Shynar T. Taimassova and Daniil B. Gogol},
journal={Research Square},
year={2026},
doi={https://doi.org/10.21203/rs.3.rs-8895037/v1}
}
