Magnetic and resonance properties of the two-dimensional S = 1 compound Ni₅(TeO₃)₄Cl₂ with frustrated geometry

• Published in: Физика низких температур
• Date: 2008
• Main Authors: Gnatchenko, S.L., Kobets, M.I., Khatsko, E.N., Baran, M., Szymczak, R., Lemmens, P., Berger, H.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2008
• Subjects: Низкотемпеpатуpный магнетизм
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/117392
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Magnetic and resonance properties of the two-dimensional S = 1 compound Ni₅(TeO₃)₄Cl₂ with frustrated geometry / S.L. Gnatchenko, M.I. Kobets, E.N. Khatsko, M. Baran, R. Szymczak, P. Lemmens, H. Berger // Физика низких температур. — 2008. — Т. 34, № 8. — С. 798–803. — Бібліогр.: 7 назв. — англ.

The magnetic and magnetoresonance properties of a new single-crystal compound Ni₅(TeO₃)₄Cl₂ are studied. The measurements of the magnetization and magnetic susceptibility of the crystal in a wide temperature range (5–300 K) made it possible to conclude that Ni₅(TeO₃)₄Cl₂ is a quasi-two-dimensional antiferromagnet with the easy magnetization axis a* directed perpendicular crystallographic plane bc and a magnetic ordering temperature TN≈21 K. The resonance measurements at 4.2 K in wide range of frequencies (25–105 GHz) and magnetic field (up to 200 kOe) permitted us to obtain the frequency–field dependence of AFMR spectrum for a field applied along the easy magnetization axis a*. It is shown that the magnetic field directed along the antiferromagnetism axis (H||a*) induces the magnetic phase transition of a spin-flop type which is found to be Hsf≈120 kOe. The magnetic resonance experimental data are described qualitatively in model of the biaxial antiferromagnet.