Journal of Physical Studies 25(2), Article 2701 [4 pages] (2021)
DOI: https://doi.org/10.30970/jps.25.2701

STRUCTURE AND MAGNETIC PROPERTIES OF [(CH3)3NH]MnCl3×2H2O CRYSTALS

V. Kapustianyk1 , Yu. Chornii1 , P. Demchenko2 , E. Khatsko3

1Faculty of Physics, Ivan Franko National University of Lviv,
50, Drahomanov St., Lviv, UA–79005, Ukraine,
2Faculty of Chemistry, Ivan Franko National University of Lviv,
8, Kyrylo & Mefodiy St., Lviv, UA–79005, Ukraine,
3B. Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine,
47, Nauky Ave., Kharkiv, UA–61103, Ukraine,
e-mail:ychornii@gmail.com

Received 13 November 2020; in final form 27 January 2021; accepted 28 January 2021; published online 03 June 2021

The X-ray powder diffraction study of [(CH$_3$)$_3$NH]MnCl$_3\times2$H$_2$O (TrMAMnCl) single crystal confirmed the chemical composition and symmetry of the investigated compound and refined the lattice parameters in comparison with the previous data: \textit{a} = 16.7492(7), \textit{b} = 7.4241(3),\linebreak \textit{c} = 8.2119(3) Å, unit cell volume \textit{V} = 1021.13(7) Å$^3$. Temperature and field dependences of the magnetization of TrMAMnCl single crystals have been measured. They shown that TrMAMnCl behaves as a canted one-dimensional antiferromagnet with the Neel temperature $T_{\rm N} = 0.98$ K. Taking into account the data of ESR, magnetic specific heat and structural study, behavior of the magnetization can be explained by assumming that there is a hidden canting of the spin along the $b$ axis in the investigated crystal. The broad maximum of the magnetization observed at \linebreak \textit{T} = 2.5 K (just above the ordering temperature) was related to the effect of the noticeable short-range order by analogy with the related compounds with alkylammonium cations and linear chains of the magnetic ions complexes.

Key words: antiferromagnet, magnetic properties, magnetization, low-dimensional spin systems, X-ray powder diffraction

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