Orbital structure and magnetic ordering in layered manganites: Universal correlation and its mechanism

S. Okamoto; S. Ishihara; S. Maekawa

doi:10.1103/PhysRevB.63.104401

Orbital structure and magnetic ordering in layered manganites: Universal correlation and its mechanism

S. Okamoto, S. Ishihara, S. Maekawa

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Abstract

Correlation between orbital structure and magnetic ordering in layered manganites is examined. A level separation between the 3d_3z²-r² and 3d_x²-y² orbitals in a Mn ion is calculated in the ionic model for a large number of the compounds. It is found that the relative stability of the orbitals dominates the magnetic transition temperatures as well as the magnetic structures at zero temperature. A mechanism of the correlation between orbital and magnetism is explained by a theory based on the model with the two e_g orbitals under strong electron correlation.

Original language	English
Pages (from-to)	6
Number of pages	1
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	63
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.63.104401
State	Published - Mar 1 2001
Externally published	Yes

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abstract = "Correlation between orbital structure and magnetic ordering in layered manganites is examined. A level separation between the 3d3z2-r2 and 3dx2-y2 orbitals in a Mn ion is calculated in the ionic model for a large number of the compounds. It is found that the relative stability of the orbitals dominates the magnetic transition temperatures as well as the magnetic structures at zero temperature. A mechanism of the correlation between orbital and magnetism is explained by a theory based on the model with the two eg orbitals under strong electron correlation.",

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AB - Correlation between orbital structure and magnetic ordering in layered manganites is examined. A level separation between the 3d3z2-r2 and 3dx2-y2 orbitals in a Mn ion is calculated in the ionic model for a large number of the compounds. It is found that the relative stability of the orbitals dominates the magnetic transition temperatures as well as the magnetic structures at zero temperature. A mechanism of the correlation between orbital and magnetism is explained by a theory based on the model with the two eg orbitals under strong electron correlation.

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Orbital structure and magnetic ordering in layered manganites: Universal correlation and its mechanism

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