| Issue |
EPL
Volume 78, Number 5, June 2007
|
|
|---|---|---|
| Article Number | 57005 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/78/57005 | |
| Published online | 22 May 2007 | |
Magnetic structure and phase diagram in a spin-chain system: 
Russian Federal Nuclear Center - VNIIEF, Sarov, 607188, Russia
Received:
11
February
2007
Accepted:
25
April
2007
A transformation of the low-temperature magnetic structure governed by the 2D Ising model to the high-temperature honeycomb structure in the frustrated spin-chain compound Ca3Co2O6 is investigated. It is shown that the crossover between the two magnetic structures at 12 K arises from the entropy accumulated in the disordered chains. This interpretation is in an agreement with the experimental data. General rules for the phase diagram of frustrated Ising chain compounds are formulated.
PACS: 75.25.+z – Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.) / 75.30.Kz – Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.) / 75.50.Lk – Spin glasses and other random magnets
© Europhysics Letters Association, 2007
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