Lattice distortion in TmCo\(_2\): a poly- and single- crystal study

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 p...

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Bibliographic Details
Published in:arXiv.org 2020-04
Main Authors: Šebesta, J, Kriegner, D, Prchal, J
Format: Article
Language:English
Subjects:
Critical temperature
Crystal lattices
Crystal structure
Curie temperature
Distortion
Ferrimagnetism
Magnetic properties
Single crystals
Transition temperature
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.2004.01938