Issue |
EPL
Volume 102, Number 5, June 2013
|
|
---|---|---|
Article Number | 57005 | |
Number of page(s) | 6 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/102/57005 | |
Published online | 19 June 2013 |
The spin-spiral waves and magnetic phase separation at finite temperatures
1 Physical-Technical Institute - Kirov Str. 132, Izhevsk 426000, Russia
(a) arzhnikof@bk.ru
(b) groshev_a.g@mail.ru
Received: 14 March 2013
Accepted: 23 May 2013
The effect of temperature on the magnetic phase separation and the parameters of spin-spiral (helical) waves is studied using a two-dimensional single-band t-t’ Hubbard model. We obtained the dependence on the temperature of the parameters of helical magnetic phases and magnetic phase-separation (PS) regions. With an increase in temperature, the PS regions (AF + [Q,Q]), ([Q,Q] + [Q,π]) get substantially reduced but new PS [Q1,π] + [Q2,π], (AF + [Q,π]) arise. The results are used for the interpretation of the magnetic properties of cuprates.
PACS: 75.30.Kz – Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.) / 71.10.Fd – Lattice fermion models (Hubbard model, etc.) / 75.10.Lp – Band and itinerant models
© EPLA, 2013
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