Samarium magnetism studied onSmPd2Al3single crystal

Abstract

In this paper, specific features of Sm magnetism in an intermetallic compound have been studied.For this purpose, a high quality single crystal of SmPd 2 Al 3 was grown and subjected to detailed measurements of specific heat, magnetization, AC susceptibility and electrical resistivity with respect to temperature and a magnetic field applied along the principal crystallographic directions. T, as detected in the 1.8-K magnetization data. The temperature dependence of the paramagnetic susceptibility below 200 K can be in the first approximation interpreted in terms of a Curie-Weiss law modified by temperature independent van Vleck contribution due to the low-lying first excited multiplet J = 7/2 being populated. At higher temperatures, involvement of the second excited multiplet J = 9/2 should also be considered. The experimental data are discussed together with the results of electronic-structure and crystal-field calculations from first principles, which were performed as an important part of the study for comprehension and explanation of the observed behavior of the SmPd 2 Al 3 compound.

YPd2Al3—A new superconducting compound

“…The SmPd 2 Al 3 magnetism is strongly influenced by the crystal field interactions. The paramagnetic susceptibility behavior reflects population of the higher energy multiplets of the Sm 3+ ion [13].…”

Structural and magnetic study of SmTAl single crystals (T=Pd and Ni)

“…A need of higher excited levels consideration was reported also, e.g., in SmPd 2 Al 3 . 17 SmPdAl and SmNiAl become magnetically ordered at low temperatures below the ordering temperatures 15.3(2) K and 20.3(3) K, respectively (as determined from the specific heat data). The anomalies corresponding to the estimated ordering temperature visible by other used methods are in good agreement with this temperature (see Fig.…”

Frustrated antiferromagnetic honeycomb-tunnel-like latticeCuR2Ge2O8(R=Pr, Nd, S

“…The samarium compound also shows a cusp in χ(T ) at T N =4.34 K. However, the inverse susceptibility does not follow the Curie-Weiss law due to the intermultiplet splittings with different J [50,51] and the experimental effective moments around room temperature do not coincide with the theoretical value from Hund's rules [47]. Therefore, we could not estimate the exchange interaction of the ground states from θ CW obtained by fitting the high temperature region.…”