Magnetic domain walls in single-phase and phase-separated double-exchange systems

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We investigate the structure of magnetic domain walls in a classical double-exchange ferromagnet, evaluating domain wall energies and charges. Three different cases are studied: (i) a conventional smooth Bloch wall, (ii) an abrupt Ising-type wall, which is shown to have lower energy at small values of carrier concentration, and (iii) stripe wall, corresponding to the two ferromagnetic domains being separated by a stripe of another, antiferromagnetic, phase. General aspects of energy balance and geometry of phase-separated states are discussed in this context. It is speculated that domain walls of the latter type may be responsible for the unusual transport properties of certain manganate films.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number6
StatePublished - 6 Feb 2003
Externally publishedYes


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