Thermal and magnetic studies of the nearly one-dimensional antiferromagnetic system CsNiBr3 |
| |
Authors: | R Brener E Ehrenfreund H Shechter J Makovsky |
| |
Institution: | Physics Department and Solid State Institute, Technion-Israel Institute of Technology, Haifa, Israel;Nuclear Research Center, Negev, Beer-Sheba, Israel |
| |
Abstract: | Magnetic susceptibility, specific heat and 133Cs magnetic resonance measurements in a single crystal of CsNiBr3 are reported. The data reveal two magnetic transitions separating the paramagnetic phase from the antiferromagnetic ground state. At the higher transition temperature TN2 = (14.25 ± 0.05)K a net magnetic moment is observed only along the hexagonal c-axis, while only below the lower transition temperature TN1 = (11.75 ± 0.05)K a perpendicular component of the magnetic moment appears also. Above TN2 CsNiBr3 can be described as a one-dimensional antiferromagnet with intrachain exchange interaction and single-ion anisotropy constant . Below TN1, the data are consistent with the non-colinear triangular structure of the Ni2+ moments proposed previously for the isomorphic crystal CsNiCl3. A reduced value of the zero-temperature susceptibility over the classical value is found and atrributed to the zero point deviations. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|