Fizika Nizkikh Temperatur: Volume 45, Number 9 (September 2019), p. 1217-1222 ( to contents , go back )
Evidence of spin correlations in monocrystal ErAl3(BO3)4
V.A. Bedarev, D.N. Merenkov, M.I. Kobets, A.A. Zvyagin, S.N. Poperezhai, S.L. Gnatchenko
B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Nauki Ave., Kharkiv 61103, Ukraine
T. Zajarniuk, T. Vasevych, М.U. Gutowska, A. Szewczyk
Institute of Physics, Polish Academy of Sciences, Warsaw, Poland
L.V. Kirenskiy Institute of Physics, Siberian Branch of the Russian Academy of Sciences Krasnoyarsk 660036, Russia
Received April 12, 2019, published online July 26, 2019
The substantial magnetic contribution to specific heat of monocrystal ErAl3(BO3)4 is revealed below 5 К. The results of investigations of EPR spectrum at 4.2 K show evidence of a short-range magnetic order. The obtained data are discussed within the model considering the spin-spin interaction between rare-earth ions in pair clusters.
Key words: еlectronic paramagnetic resonance, heat capacity, spin-spin interaction, magnetic clusters.