Lattice distortion in TmCo$_2$: a poly- and single- crystal study

J. Šebesta; D. Kriegner; J. Prchal

doi:10.1016/j.jallcom.2018.10.072

Lattice distortion in TmCo$_2$: a poly- and single- crystal study

Materials Science 2020-04-07 v1

Authors: J. Šebesta , D. Kriegner , J. Prchal

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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 $T_{C}\sim3.6$ ~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 Fd $\bar{3}$ m to R $\bar{3}$ m space group. The relation between observed magnetic and structural properties in this compound is discussed.

Keywords

phase transitions magnetic structure frustrated magnetism

Cite

@article{arxiv.2004.01938,
  title  = {Lattice distortion in TmCo$_2$: a poly- and single- crystal study},
  author = {J. Šebesta and D. Kriegner and J. Prchal},
  journal= {arXiv preprint arXiv:2004.01938},
  year   = {2020}
}

Lattice distortion in TmCo$_2$: a poly- and single- crystal study

Abstract

Keywords

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