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  • 1
    Electronic Resource
    Electronic Resource
    Honeycomb domain structures in amorphous TbFe thin films (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 90 (2001), S. 3124-3126 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetic properties and domain structure of amorphous TbFe thin films were studied by magnetic measurement and magnetic force microscope. Honeycomb domain structures were found in the as-deposited amorphous film. The domain structures were composed of many small white round dots embedded in the black matrix, which formed an irregular hexagonal pattern with some deformation. The average dot size was about 450 nm, with an average separation of 610 nm. The derived domain wall energy density γ and the exchange constant A were 0.95×10−2 and 1.79×10−11 J/m, respectively. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1391423
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  • 2
    Electronic Resource
    Electronic Resource
    Magnetic force microscopy study on the effect of Cu in melt-spun Sm–Fe–Si–C ribbons (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 2061-2063 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The microstructure and magnetic domain structure of nanocrystalline melt-spun Sm2Fe15−xCuxSi2C (x=0 and 1) ribbons are investigated by magnetic force microscopy (MFM). The MFM signal, such as Δφmax and root-mean-square, which is sensitive to the sample magnetic stray field, is much stronger in Cu-doped MFM image than that in Cu-free MFM image. This is consistent with the result of the effective demagnetization factor Neff derived from the temperature dependence of coercivity. The exchange–decoupling effect of Cu which precipitates the grain boundary and forms nonmagnetic boundary phase is discussed. Magnetic domains ranging over 300–500 nm are found in both samples. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.372138
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  • 3
    Electronic Resource
    Electronic Resource
    Magnetic properties and magnetic-domain structures of nanocrystalline Sm2Fe14.5Cu0.5Ga2Cy (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 546-548 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetic properties and magnetic-domain structures of nanocrystalline Sm2Fe14.5Cu0.5Ga2Cy (y=0–2.0) alloys prepared by melt spinning and subsequent heat treatment were studied. The coercivity of optimum annealing ribbons first increases significantly with increasing carbon content for y≤1.0. It does not change much for 1〈y≤2. The maximum coercivity μ0Hc is 2.6 T at room temperature for ribbons with y=1.5–2.0 after annealing in a Sm atmosphere at 1047 K for 30 min. The domain structure was studied by magnetic-force microscope. The as-spun amorphous Sm2Fe14.5Cu0.5Ga2C1.5 ribbons exhibit very weak magnetic contrast. The magnetic-domain length scale is 300–700 nm and much larger than the grain size in the Sm2Fe14.5Cu0.5Ga2C1.5 ribbons, which may be caused by interactions between the grains. In the Sm2Fe14.5Cu0.5Ga2 ribbons, the domain-length scale is 100–200 nm and the magnetic-tip–sample interaction strength is weaker than in the Sm2Fe14.5Cu0.5Ga2C1.5 ribbons. These results have been correlated with the magnetic properties and microstructure. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.124417
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