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Magnetization and specific heat study on a SmCuAl3 single crystal

AuthorsKlicpera, M.; Diviš, Martin; Malý, Filip; Puente-Orench, Inés; Javorský, P.
KeywordsRare-earth based RCuAl3
Crystal field calculations
Single crystal
Specific heat
Issue Date2020
CitationJournal of Alloys and Compounds 822: 153595 (2020)
AbstractWe report on structural and magnetic properties of a SmCuAl3 single crystal. The sample quality, phase and structure purity were investigated by means of x-ray and neutron diffraction, BSE electron microscopy and EDX analysis. The crystal structure was identified to be of a tetragonal BaNiSn3-type (space group I4mm, 107). Magnetization measurements revealed two magnetic phase transitions: from paramagnetic to ferromagnetic state at Tc = 28 K and another transition at TN = 6.6 K connected with a development of the antiferromagnetic component of magnetic moments. Both ferromagnetic and antiferromagnetic components are followed down to lowest temperature. Possible origins of the phase transition at 28 K are discussed. Paramagnetic data are well described assuming a Sm3+ ground-state-multiplet splitting in crystalline environment. Crystal field parameters are estimated and used for magnetization and specific heat calculations revealing a qualitatively good agreement with the experimental data.
Publisher version (URL)https://doi.org/10.1016/j.jallcom.2019.153595
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