Magnetic Force Microscopy Studies of Magnetic Features and Nanostructures

Yue, Lanping; Liou, Sy Hwang

doi:10.1007/978-3-642-10497-8_10

Cited by 12 publications

(8 citation statements)

References 94 publications

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“…Many magnetic grains participate in the formation of an interaction domain in which the grains exhibit the similar orientation of magnetization (up and/or down domains), yet the MFM phase image contrast represents magnetic-forcegradient mapping largely normal to the surface. In this case, the bright domain indicates the tip is repulsive to the spot, while the black domain indicates it is attractive [38]. So the out-of plane component of magnetization is far more significant for cobalt on chromia, than cobalt on sapphire (Al 2 O 3 ).…”

Section: In-plane Magnetic Anisotropy Of the Cobalt Adlayermentioning

confidence: 99%

Low temperature growth of cobalt on Cr₂O₃(0 0 0 1)

Cao

Zhang

Komesu

et al. 2016

J. Phys.: Condens. Matter

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The thickness and temperature dependence of in situ grown cobalt thin films on Cr2O3(0 0 0 1) single crystalline substrate has been studied by low energy electron microscopy (LEEM). The LEEM images indicate that growth of thin Co films (⩽5 monolayers) on chromia at 100 K tends to be continuous and flat with suppressed island growth compared to films grown on chromia at room temperature and above (to ~440 K). Low energy electron diffraction indicates that disorder builds and crystallinity of the cobalt thin film decreases with increased film thickness. Compared with cobalt thin films on Al2O3(0 0 0 1) single crystalline substrate, cobalt thin films on Cr2O3(0 0 0 1) show larger magnetic contrast in magnetic force microscopy indicating enhancement of perpendicular anisotropy induced by Cr2O3.

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Section: In-plane Magnetic Anisotropy Of the Cobalt Adlayermentioning

confidence: 99%

Low temperature growth of cobalt on Cr₂O₃(0 0 0 1)

Cao

Zhang

Komesu

et al. 2016

J. Phys.: Condens. Matter

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“…Many magnetic grains participate in the formation of an interaction domain in which the grains exhibit the similar orientation of magnetization (up-down domains). Such domain patterns are well known to describe ferromagnetic structures [13]. Magnetic measurement results also indicate that all the samples are ferromagnetic at room temperature.…”

Section: Methodsmentioning

confidence: 53%

“…It is easy to define the average domain size for simple domain configurations by visual methods. But for the complicated irregular interaction domains the magnetic correlation length (the average domain width) can be estimated by several methods [13][14][15][16][17]. We have used the grain-size-analysis software incorporated in our MFM system to calculate from the MFM images as an average over the lateral dimension of the domains sizes.…”

Section: Methodsmentioning

confidence: 99%

Magnetic Force Microscopy Study of Zr₂Co₁₁‐Based Nanocrystalline Materials: Effect of Mo Addition

Yue

Jin

Zhang

et al. 2015

Journal of Nanomaterials

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The addition of Molybdenum was used to modify the nanostructure and enhance coercivity of rare-earth-free Zr2Co11-based nanocrystalline permanent magnets. The effect of Mo addition on magnetic domain structures of melt spun nanocrystalline Zr16Co84-xMox(x=0, 0.5, 1, 1.5, and 2.0) ribbons has been investigated. It was found that magnetic properties and local domain structures are strongly influenced by Mo doping. The coercivity of the samples increases with the increase in Mo content (x≤1.5). The maximum energy product(BH)maxincreases with increasingxfrom 0.5 MGOe forx=0to a maximum value of 4.2 MGOe forx=1.5. The smallest domain size with a relatively short magnetic correlation length of 128 nm and largest root-mean-square phase shiftΦrmsvalue of 0.66° are observed for thex=1.5. The optimal Mo addition promotes magnetic domain structure refinement and thus leads to a significant increase in coercivity and energy product in this sample.

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“…In Fig. 2c the image contrast is related to the stray magnetic field out of the sample56. Although the small, branching magnetic domains can be clearly identified, the presence of the maze pattern is not clear.…”

Section: Resultsmentioning

confidence: 97%

“…In the past decade, significant advances have been made in magnetic imaging in areas of research such as magnetic recording media12 and permanent magnets34. Magnetic domains have been imaged by magnetic force microscopy (MFM)56, scanning electron microscopy polarisation analysis (SEMPA)78, magneto-optical Kerr microscopy910, and techniques using a transmission electron microscope (TEM) ( i.e., Lorentz microscopy and electron holography)1112131415. However, despite being successfully applied to many systems, these technologies still have drawbacks (depending on the principles of experiments) such as a limited field of view, long measurement time, ultra-high vacuum conditions, and preparation of a thin-foil specimen.…”

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confidence: 99%

Imaging of surface spin textures on bulk crystals by scanning electron microscopy

Akamine

Okumura

Farjami

et al. 2016

Sci Rep

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Direct observation of magnetic microstructures is vital for advancing spintronics and other technologies. Here we report a method for imaging surface domain structures on bulk samples by scanning electron microscopy (SEM). Complex magnetic domains, referred to as the maze state in CoPt/FePt alloys, were observed at a spatial resolution of less than 100 nm by using an in-lens annular detector. The method allows for imaging almost all the domain walls in the mazy structure, whereas the visualisation of the domain walls with the classical SEM method was limited. Our method provides a simple way to analyse surface domain structures in the bulk state that can be used in combination with SEM functions such as orientation or composition analysis. Thus, the method extends applications of SEM-based magnetic imaging, and is promising for resolving various problems at the forefront of fields including physics, magnetics, materials science, engineering, and chemistry.

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Magnetic Force Microscopy Studies of Magnetic Features and Nanostructures

Cited by 12 publications

References 94 publications

Low temperature growth of cobalt on Cr₂O₃(0 0 0 1)

Low temperature growth of cobalt on Cr₂O₃(0 0 0 1)

Magnetic Force Microscopy Study of Zr₂Co₁₁‐Based Nanocrystalline Materials: Effect of Mo Addition

Imaging of surface spin textures on bulk crystals by scanning electron microscopy

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Magnetic Force Microscopy Studies of Magnetic Features and Nanostructures

Cited by 12 publications

References 94 publications

Low temperature growth of cobalt on Cr2O3(0 0 0 1)

Low temperature growth of cobalt on Cr2O3(0 0 0 1)

Magnetic Force Microscopy Study of Zr2Co11‐Based Nanocrystalline Materials: Effect of Mo Addition

Imaging of surface spin textures on bulk crystals by scanning electron microscopy

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Low temperature growth of cobalt on Cr₂O₃(0 0 0 1)

Low temperature growth of cobalt on Cr₂O₃(0 0 0 1)

Magnetic Force Microscopy Study of Zr₂Co₁₁‐Based Nanocrystalline Materials: Effect of Mo Addition