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Interplay of orbitally polarized and magnetically ordered phases in doped transition metal oxides
Author(s) -
Frésard Raymond,
Raczkowski Marcin,
Oleś Andrzej M.
Publication year - 2005
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200460038
Subject(s) - condensed matter physics , antiferromagnetism , atomic orbital , ferromagnetism , electron , doping , spin (aerodynamics) , physics , metal , coupling (piping) , field (mathematics) , crystal (programming language) , materials science , quantum mechanics , computer science , metallurgy , thermodynamics , programming language , mathematics , pure mathematics
Abstract We investigate the magnetic instabilities of the two‐dimensional model of interacting e g electrons for hole doping away from two electrons per site in the mean‐field approximation. In particular, we address the occurrence of orbitally polarized states due to the inequivalent orbitals, and their interplay with ferromagnetic and antiferromagnetic spin order. The role played by the Hund's exchange coupling J H and by the crystal field orbital splitting E z in stabilizing one of the competing phases is discussed in detail. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)