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Open AccessArticle10.1063/1.4927423

Magnetic anisotropy and magnetic domain structure in C-doped Mn5Ge3

Lisa Michez,François Virot,Matthieu Petit,R. Hayn,L. Notin,Olivier Fruchart+3 more-2015-07-28-Journal of Applied Physics
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TL;DRAbstract

Magnetic properties of Mn5Ge3C0.7 thin films grown by molecular beam epitaxy have been studied. SQUID-VSM measurements and magnetic force microscopy have been used to probe the magnetic state and determine the relevant magnetic parameters. The results are supported by a combination of improved Saito's and Kittel's models. The moderate perpendicular magnetic anisotropy (Qexp=2Kuμ0MSat2≈0.2) leads to a stripe domain structure for film thicknesses above 28 nm. For thinner films, the magnetization lies in-plane. The uniaxial magnetocrystalline constant has been found to be much weaker than in Mn5Ge3 and is assigned to hybridization effect between the Mn and C atoms.

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Magnetic properties of Mn5Ge3C0.7 thin films grown by molecular beam epitaxy have been studied. SQUID-VSM measurements and magnetic force microscopy have been used to probe the magnetic state and determine the relevant magnetic parameters. The results are supported by a combination of improved Saito's and Kittel's models. The moderate perpendicular magnetic anisotropy (Qexp=2Kuμ0MSat2≈0.2) leads to a stripe domain structure for film thicknesses above 28 nm. For thinner films, the magnetization lies in-plane. The uniaxial magnetocrystalline constant has been found to be much weaker than in Mn5Ge3 and is assigned to hybridization effect between the Mn and C atoms.

Keywords

Magnetic force microscopeMagnetic anisotropyMagnetocrystalline anisotropyMagnetic domainCondensed matter physicsMaterials scienceSquidMagnetization

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