|
|||||
|
|
Magnetic phase transitions and structures of Co3V 2O8 |
|
| Authors: | N Qureshi H Fuess TC Hansen |
| Institution: | a Institute for Materials Science, University of Technology, Petersenstrasse 23, 64287 Darmstadt, Germany b Institut Max von Laue-Paul Langevin, 6 rue Jules Horowitz, BP 156, 38042 Grenoble Cedex 9, France c Institute for Physics, Justus Liebig University, Heinrich-Buff-Ring 16, 35392 Giessen, Germany |
| Abstract: | Co3V 2O8 is a spin- 3/2 system on a Kagomé staircase and is known to undergo two magnetic phase transitions between 6 and 11 K. The H-T phase diagram of Co3V 2O8 derived by magnetization measurements on a single crystal is presented. Additionally both ordered magnetic structures were investigated by neutron powder diffraction experiments and solved using Bertaut’s macroscopic theory. For the ferromagnetic phase the magnetic moments of the Co2+ ions were found to be 1.5(3)μB and 2.7(1)μB at 3.5 K along the crystallographic a axis for the (4a) and (8e) sites, respectively. The antiferromagnetic phase exhibits a magnetic cell with a doubled b axis with respect to the nuclear one. The magnetic moments point along the a axis being 1.8(2)μB (4a) and 1.8(1)μB (8e) at 8 K. |
| Keywords: | 75 25 +z 75 30 Gw 75 30 Kz 75 40 Cx |
| 本文献已被 ScienceDirect 等数据库收录！ | |