Conditions for the spin-spiral state in itinerant magnets

TL;DR

This paper investigates the conditions under which spin-spiral magnetic states occur in itinerant magnets using the Hubbard model, revealing phase diagrams and stabilization mechanisms for complex magnetic configurations.

Contribution

It introduces a phase diagram for spin-spiral states in the Hubbard model considering noncollinearity, and explores stabilization of three-component magnetic moments.

Findings

Phase diagram showing regions of spin-spiral and paramagnetic states.

Conditions for stabilization of three-component magnetic moments.

Dependence of magnetic states on electron number and U/t ratio.

Abstract

The spin-spiral (SS) type of magnetization is studied with the Hubbard model. Consideration of noncollinearity of the magnetic moments results in a phase diagram which consists of regions of the SS and paramagnetic states depending on the number of electrons and the parameter U/t (U is the Hubbard repulsion, and t is an overlap integral). A possibility of stabilization of the SS state with three nonzero components of magnetic moment is considered.