Helicoidal ordering in iron perovskites

Maxim Mostovoy

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Helicoidal ordering in iron perovskites

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arxiv cond-mat/0409068 v1 pith:GVF7W2FE submitted 2004-09-03 cond-mat.mtrl-sci cond-mat.str-el

Helicoidal ordering in iron perovskites

Maxim Mostovoy This is my paper

classification cond-mat.mtrl-sci cond-mat.str-el

keywords orderingmagnetichelicoidalironmaterialsbandscafeocharge

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We consider magnetic ordering in materials with negative charge transfer energy, such as iron perovskite oxides. We show that for a large weight of oxygen holes in conduction bands, the double exchange mechanism favors a helicoidal rather than ferromagnetic spin ordering both in metals, e.g. SrFeO_3 and insulators with a small gap, e.g. CaFeO_3. We discuss the magnetic excitation spectrum and effects of pressure on magnetic ordering in these materials.

Helicoidal ordering in iron perovskites

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