Methods for preparing patterned media for high-density recording

Lodder, J.C.

doi:10.1016/j.jmmm.2003.12.259

Cited by 87 publications

(44 citation statements)

References 50 publications

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“…1 In conventional lithography a pattern is typically created in a resist layer which is subsequently transferred to a magnetic film. The pattern generation can be accomplished with a number of technologies such as electron beam lithography, 2,3 ion beam lithography, [4][5][6][7][8] near field lithography, 9,10 laser interference lithography, [11][12][13][14] x-ray lithography, 15,16 or nanoimprint. 17,18 Unfortunately, most methods may not be suitable for largescale device fabrication because they are multistep, expensive, and involve time-consuming procedures.…”

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confidence: 99%

Arrays of magnetic nanoindentations with perpendicular anisotropy

Makarov¹,

Baraban²,

Guhr³

et al. 2007

Applied Physics Letters

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The authors report an approach to the fabrication of periodic magnetic patterns using spherical indentations. These troughs are shaped by an imprint technique, employing a self-assembled monolayer of particles. Well-defined structures with perpendicular magnetic anisotropy are obtained by deposition of Co/ Pd multilayer films onto the topographic array. The structures formed in the indentations can be magnetically exchange decoupled from their neighbors depending critically on their specific shape. The presented concept leads to a realization of a magnetic nanostructure medium, which offers advances in achieving high pattern densities combining a low cost nanoimprint approach with material functionalization.

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confidence: 99%

Arrays of magnetic nanoindentations with perpendicular anisotropy

Makarov¹,

Baraban²,

Guhr³

et al. 2007

Applied Physics Letters

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“…The vibrations were generated by a low-voltage actuator, type PA 4/12 (Piezosystem Jena Inc. 1 ), fed by a power supply ENV800 1 . The sample-holder, attached accordingly to the actuator, conveyed the vertical vibrations to the particles.…”

Section: Methodsmentioning

confidence: 99%

“…The arrangement of micro and nano-objects on patterned media emerges within the contemporary organizational methods and techniques [1][2][3] applied in nanotechnology. Its purpose is to create independent entities with a unique blend of properties, some inherent from the parent material, some intrinsic, originating from the smallest unit, and * E-mail: dr_kpaul@hotmail.com blended into a new complex variety.…”

Section: Introductionmentioning

confidence: 99%

Organization of matter into one-dimensional units on designed media

Paul

2011

Open Physics

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Abstract:The organization of magnetic materials into one-dimensional micro-and nanowires on designed media is discussed, exemplified by two experiments on the microscale and nanoscale, with regard to particles as basic building blocks for the growth and development of matter. In the first organizational experiments, cobalt (Co) micro-particles are assembled on patterned media with perpendicular magnetization by acoustic vibrations onto designed shapes reflecting macroscopically the parent material. In the second experiments, semiconductor Germanium-Dysprosium (Ge 98 Dy 2 ) matter is assembled on gold (Au) catalytic nuclei in a tube reactor by physical vapor transport as clusters of nanowires. The underlying mechanisms of organization are described, and similarities and distinctive features in the processes are discussed. The role of the energy-input in the form of mechanical vibrations and heat is outlined with its similar impact on the assembly and growth of matter on surfaces. The description of these experiments in view of organization allows more control over the processes of planned arrangement on designed media. Routes for further progress in this direction are briefly outlined. PACS

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“…Different techniques have been utilized to fabricate these structures, but electrodeposition has been proved to be simple, fast and a low cost technique, as well as using this technique, it is possible to produce different materials and multilayer as: thin films, nanowires or nanotubes [5,8,11,12,14,18,31].…”

Section: Introductionmentioning

confidence: 99%

Surface Morphology and Magnetic Properties of Isolated Cylindrical Nickel Nanowires

Sultan¹

2017

AJN

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Abstract:In this article, the surface morphology and magnetic properties of isolated cylindrical nickel (Ni) nanowires fabricated by electrodeposition have been thoroughly investigated using scanning electron microscopy and Magneto-Optical Kerr Effect (MOKE) magnetometry, respectively. The surfaces of most nanowires were found to be homogenous, uniform, and cylindrical in shape. Some others show different diameters and surface features, including; protrusions and branches along their length. The diameter distribution of a wide range of nanowires was found to differ from their template pore diameters. These all variations are more likely due to defects exist in the internal surfaces of the pores within the template itself, or may be associated with the trapped air pockets within the pores during nanowires growth or due to the oxide formation or residual contaminants which may cover these wires. The nanowires lengths were found to differ from their actual lengths estimated during deposition growth. This was attributed to the breakage of nanowires into small sections during releasing process. The hysteresis loops obtained by applying a magnetic field at different angles with respect to the nanowires long axis showed square hysteresis loops with a sharp jump of Kerr signal during switching behaviour, as well as a high squareness ratio, indicating the dominance of shape anisotropy. These results are quite different from the measurements of high density templated nanowires reported in the literature, due to the small number of nearest neighbour nanowires, and hence no magneto-static interaction. The magnetisation reversal of such wires is well described by the non-uniform rotation of the curling model of domain reversal.

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Methods for preparing patterned media for high-density recording

Cited by 87 publications

References 50 publications

Arrays of magnetic nanoindentations with perpendicular anisotropy

Arrays of magnetic nanoindentations with perpendicular anisotropy

Organization of matter into one-dimensional units on designed media

Surface Morphology and Magnetic Properties of Isolated Cylindrical Nickel Nanowires

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