Magnetic Domain Walls in Single-Phase and Phase-Separated Double Exchange Systems

Abstract

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.

20 pages, LaTeX-Revtex, 10 PostScript figures. Minor misprints corrected

References in corpus (5)

• Colossal Magnetoresistant Materials: The Key Role of Phase Separation
• Strain driven charge-ordered state in La${}_{0.67}$Ca${}_{0.33}$MnO${}_3$
• The self-organised phases of manganites
• The breakdown of the Nagaoka phase in the 2D t-J model
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Cited by in corpus (9)

• Tunneling magnetoresistance in (La,Pr,Ca)MnO3 nanobridges
• Modulation and correlations lengths in systems with competing interactions
• Effects of the On-Site Coulomb Repulsion in Double Exchange Magnets
• Conducting Jahn-Teller Domain Walls in Undoped Manganites
• Nonresonant microwave absorption in epitaxial La-Sr-Mn-O films and its relation to colossal magnetoresistance
• Quantum percolation and magnetic nano-dropletstates in electronically phase-separated manganite nanowires
• Boundary Energies and the Geometry of Phase Separation in Double--Exchange Magnets
• Inhomogeneous Phases in a Double-Exchange Magnet with Long Range Coulomb Interactions
• Point contact investigations of film and interface magnetoresistance of La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$ heterostructures on Nb:SrTiO${}_3$