Magnetic and resonant properties of quasi-one-dimensional antiferromagnet LiCuVO4
Abstract
The electron-spin-resonance (ESR) and dc magnetization measurements of the spinel-type compound LiCuVO4 in a temperature range 2-300 K are presented. At cooling, the magnetization shows a broad maximum at TM=28 K, characteristic of a quasi-one-dimensional magnetic system. Then, the magnetization somewhat increases at temperatures below ~9 K, shows a second maximum at TN'~4 K, and a subsequent sharp drop. Both magnetization and ESR data indicate that the three-dimensional antiferromagnetic ordering occurs at TN=2.3 K. Above TN the asymmetric ESR spectra of the LiCuVO4 powder sample are in correspondence with the symmetry of the crystal field on Cu2+ ions. The g|| and g⊥ values diverge at cooling as is anticipated for a quasi-one-dimensional Heisenberg antiferromagnet. According to the Bonner-Fisher model the interchain exchange interaction is J1=22 K, while the intrachain exchange interaction is estimated to be J2~1 K.
- Publication:
-
Physical Review B
- Pub Date:
- July 2001
- DOI:
- 10.1103/PhysRevB.64.024419
- Bibcode:
- 2001PhRvB..64b4419V
- Keywords:
-
- 75.30.Kz;
- 75.50.Ee;
- 75.30.Cr;
- Magnetic phase boundaries;
- Antiferromagnetics;
- Saturation moments and magnetic susceptibilities