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2007•Applied Physics LettersRequires access

Magnetic domain configurations of epitaxial chromium dioxide (CrO2) nanostructures

Xiaojing Zou, Gang Xiao

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Abstract

Magnetic domain structures of submicrometric epitaxial CrO2 fabricated using selective-area growth technique were studied by magnetic force microscopy. In-plane, lamellar domain structure with fragmented walls aligned along the magnetic easy axis direction is observed, indicating the existence of a large magnetocrystalline anisotropy. A classical model for ferromagnetic materials with a uniaxial anisotropy was used to explain this domain configuration. Estimates of the domain wall energy density and exchange stiffness constant for CrO2 were obtained.

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What this paper is about

Magnetic domain structures of submicrometric epitaxial CrO2 fabricated using selective-area growth technique were studied by magnetic force microscopy. In-plane, lamellar domain structure with fragmented walls aligned along the magnetic easy axis direction is observed, indicating the existence of a large magnetocrystalline anisotropy. A classical model for ferromagnetic materials with a uniaxial anisotropy was used to explain this domain configuration. Estimates of the domain wall energy density and exchange stiffness constant for CrO2 were obtained.

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Available abstract

Magnetic domain structures of submicrometric epitaxial CrO2 fabricated using selective-area growth technique were studied by magnetic force microscopy. In-plane, lamellar domain structure with fragmented walls aligned along the magnetic easy axis direction is observed, indicating the existence of a large magnetocrystalline anisotropy. A classical model for ferromagnetic materials with a uniaxial anisotropy was used to explain this domain configuration. Estimates of the domain wall energy density and exchange stiffness constant for CrO2 were obtained.

Key concepts: Magnetocrystalline anisotropy, Magnetic anisotropy, Materials science, Ferromagnetism, Magnetic domain, Condensed matter physics, Magnetic force microscope, Domain wall (magnetism)

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