Volume 90, Number 6, June 2010
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||13 July 2010|
Field-driven magnetisation steps in Ca3Co2O6: A single-crystal neutron-diffraction study
Department of Physics, Warwick University - Coventry, CV4 7AL, UK, EU
2 Laboratoire CRISMAT, CNRS-ENSICAEN - 14050 Caen, France, EU
3 Max-Planck Institut CPfS - Nöthnitzer Str. 40, 01187 Dresden, Germany, EU
4 Institut Laue-Langevin - 6 rue Jules Horowitz, BP 156, 38042 Grenoble Cedex 9, France, EU
Accepted: 14 June 2010
The behaviour of the spin chain compound Ca3Co2O6 in an applied magnetic field has been the subject of a detailed single-crystal neutron diffraction study. The low-temperature magnetisation process is shown to be accompanied by clearly visible steps in the intensity of the ferromagnetic and antiferromagnetic Bragg peaks. The field and temperature dependence of the long-range and the short-range components of magnetic order in Ca3Co2O6 have been studied. Detailed measurements have shown that the presence of the short-range correlations cannot account for the reduction in intensity of the antiferromagnetic peaks at low temperatures.
PACS: 75.25.-j – Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.) / 75.60.Ej – Magnetisation curves, hysteresis, Barkhausen and related effects / 75.50.Ee – Antiferromagnetics
© EPLA, 2010
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