Lattice distortion in TmCo2: A poly- and single-crystal study

Abstract

Within the RCo 2 family of compounds, a structural distortion linked with the onset of magnetic ordering around the critical temperature can be observed. One of the less explored RCo 2 compounds is TmCo 2 probably due to its low Curie temperature. Exceptionally this compound, given its position at the end of the ferrimagnetic series, shows discrepancies in the ordering of the Co sub-lattice because of a weak Weiss molecular field. In this paper we focus on the structural distortion in TmCo 2 , which appears together with the magnetic ordering around the critical temperature of T C ∼ 3.6 K. Poly-crystals as well as single-crystals of TmCo 2 were used in our experiments. For both kinds of samples we observed the same type of the rhombohedral distortion along the [111] direction from the cubic Fd3m to R3m space group. The relation between observed magnetic and structural properties in this compound is discussed.

Theoretical study of magneto‐electronic properties of TmCo2 and NdCo2 intermetallic compounds through density functional theory calculations

“…[8] Furthermore, the lines of the PE resonant spectra of the RT 2 binary compounds (R = Ce, Pr, Nd; T = Co, Rh, Ir) have been studied by Y. Kucherenko et al [9] within the framework of SIAM. In 2019, J. Šebesta and coworkers [10] studied experimentally the lattice distortion in TmCo 2 compound using a low-temperature X-ray diffraction (XRD). Kong et al [11] computed the thermodynamic and transport properties of single crystalline RCo 2 Ge 2 (R = Y, La-Nd, Sm-Tm).…”