Abstract
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.
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