| Issue |
EPL
Volume 98, Number 4, May 2012
|
|
|---|---|---|
| Article Number | 47006 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/98/47006 | |
| Published online | 24 May 2012 | |
Magnetic phase transition and the spin excitations in cluster antiferromagnetic K0.8Fe1.6Se2
Department of physics, Tsinghua University - 100084 Beijing, China
Received:
29
February
2012
Accepted:
24
April
2012
We have studied the magnetic phase diagram and magnetic properties of iron selenide K0.8Fe1.6Se2 using an effective spin-exchange model. By applying the bond-operator approach, we show that the Fe moments form a checkerboard antiferromagnetic structure in a wide range of parameter regions, and the phase boundary between the magnetic phase and the spin-disordered phase is calculated as a function of the exchange interactions. We also calculate the spin excitation spectrums as well as the predicted inelastic neutron scattering patterns of the checkerboard antiferromagnetic state within the spin-wave method.
PACS: 75.25.-j – 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 classical and quantum magnetic transitions, metamagnetism, etc.) / 74.70.Xa – Pnictides and chalcogenides
© EPLA, 2012
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.