Publication Details:

Established in 2008

Journal or Publication Title:

Armenian Journal of Physics=Ֆիզիկայի հայկական հանդես

Date of publication:

2019

Volume:

12

Number:

3

ISSN:

1829-1171

Official URL:

Corporate Creators:

A. I. Alikhanyan National Scientific Laboratory, Yerevan, Armenia ; Laboratory of Information Technologies, Joint Institute for Nuclear Research, 6 Joliot-Curie St, 141980 Dubna, Russia ; CANDLE Synchrotron Research Institute, Yerevan, Armenia

Coverage:

261-272

Abstract:

We establish an exactly solvable Heisenberg-Ising modification of spin-1 Ni-containing polymer chain model, for [Ni(NN'-dmen)(μ-N₃)₂], with NN'-dmen being NN'-dimethlethyledediamine. The material has been partly studied in experiment but not for its behavior of magnetization plateaus and magnetic susceptibility at low temperatures. By exact solution, we show that the magnetization exhibits three plateaus at zero, mid, and 3/4 of the saturation value at low temperatures, when interaction parameters lie in the vicinity of the values recovered by fitting through fully Heisenberg model. The corresponding featuring peaks of magnetic susceptibility are clearly shown. We have also calculated the susceptibility in zero magnetic field versus the temperature which shows a peak around T = 12.6 K, which is compatible with the experimental results. The model also displays plateaus in thermal entanglement that capture the one-to-one correspondence between thermal entanglement and magnetization

Date created:

2019-10-17

Format:

pdf

Identifier:

oai:arar.sci.am:23577

Location of original object:

ՀՀ ԳԱԱ Հիմնարար գիտական գրադարան