A read and write element for magnetic probe recording

Craus, C.B.; Onoue, T.; Ramstöck, K.; Geerts, Wim; Siekman, Martin Herman; Abelmann, Léon; Lodder, J.C.

doi:10.1088/0022-3727/38/3/002

Cited by 8 publications

(7 citation statements)

References 13 publications

(16 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The virtually infinite rewriteability of magnetic recording media is an additional major advantage of this recording principle. Read-out can be achieved by measuring force such as in a magnetic force microscopy or by magnetic sensors (MR or GMR) integrated onto the probes [Craus05]. For the ultimate density in magnetic recording, a patterned medium, which possesses physically or magnetically isolated dots, is reported to be necessary [Yang04].…”

Section: Introductionmentioning

confidence: 99%

Heat-assisted magnetic probe recording onto a thin film with perpendicular magnetic anisotropy

Onoue¹,

Siekman²,

Abelmann³

et al. 2008

J. Phys. D: Appl. Phys.

Self Cite

View full text Add to dashboard Cite

The possibility of magnetic probe recording into a continuous perpendicular medium is discussed. By applying a current from the tip to the medium, a very localized area can be heated and bits as small as 80 nm in diameter could be written. This value is close to the calculated minimum diameter of reversed cylindrical domains in our perpendicular medium. A current can be injected directly from the tip to the medium by means of a current source, or one can use capacitive currents. We prefer the first method, since the current, and therefore the heating process, can be controlled more precisely. The energy required to write a bit is in the order of 1 nJ. Calculations show that most of the heat is dissipated at the tip end. Demagnetizing fields of the surrounding material play an important role and are so strong that bits can be written without applying an external field. By decreasing the film thickness, the demagnetizing fields are reduced, and selective overwriting of previously written bits could be demonstrated.

show abstract

Section: Introductionmentioning

confidence: 99%

Heat-assisted magnetic probe recording onto a thin film with perpendicular magnetic anisotropy

Onoue¹,

Siekman²,

Abelmann³

et al. 2008

J. Phys. D: Appl. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…For better signal-to-noise ratios, integration of a magneto-resistive sensor at the end of the probe, similarly as in hard-disk recording, is preferred. An initial step in this direction was taken by Craus et al using scanning magnetoresistance microscopy 113 . The magnetic layer in the probe can be used as a flux-focusing structure, so that the same probe can be used for writing.…”

Section: Data Readingmentioning

confidence: 99%

Probe-based data storage

Koelmans,

Engelen,

Abelmann

2015

Preprint

View full text Add to dashboard Cite

Probe-based data storage attracted many researchers from academia and industry, resulting in unprecedented high data-density demonstrations. This topical review gives a comprehensive overview of the main contributions that led to the major accomplishments in probe-based data storage. The most investigated technologies are reviewed: topographic, phase-change, magnetic, ferroelectric and atomic and molecular storage. Also, the positioning of probes and recording media, the cantilever arrays and parallel readout of the arrays of cantilevers are discussed. This overview serves two purposes. First, it provides an overview for new researchers entering the field of probe storage, as probe storage seems to be the only way to achieve data storage at atomic densities. Secondly, there is an enormous wealth of invaluable findings that can also be applied to many other fields of nanoscale research such as probe-based nanolithography, 3D nanopatterning, solid-state memory technologies and ultrafast probe microscopy. B. Current status of probe storageThe maturity of the various types of probe storage differs significantly. Four popular types, namely phase change, magnetic, thermomechanical and ferroelectric storage are listed in table I.Probe-based data storage has attracted much scientific and commercial interest [18][19][20] . After more than two decades of research on probe storage, an overview of what has been accomplished so far, together with an outlook of the a)

show abstract

“…Likewise, composites constituted by graphene and nickel yield a strength larger than 180 times of nickel 4 . A soft Ni-rich ferromagnet 5 , 6 , that is widely employed as a magnetic core material in diverse technological applications, such as magnetic recording heads 7 – 9 , microinductors and magnetoresistive random access memories (MRAM) 10 , 11 , is the so called permalloy (Py), an alloy with about 20% iron and 80% nickel content. On the one hand, bulk Py exhibits large magnetic permeability, enhanced sensitivity in sensing devices 12 , as well as low coercivity and remanence, of interest in magnetic shielding 13 .…”

Section: Introductionmentioning

confidence: 99%

Permalloy nanowires/graphene oxide composite with enhanced conductive properties

Jaimes

Márquez

Ovalle

et al. 2020

Sci Rep

View full text Add to dashboard Cite

carbon-metal-based composites arise as advanced materials in the frontiers with nanotechnology, since the properties inherent to each component are multiplexed into a new material with potential applications. in this work, a novel composite consisting of randomly oriented permalloy nanowires (py nWs) intercalated among the sheets of multi-layered graphene oxide (Go) was performed. py nWs were synthesized by electrodeposition inside mesoporous alumina templates, while Go sheets were separated by means of sonication. Sequential deposition steps of Py NWs and GO flakes allowed to reach a reproducible and stable graphene oxide-based magnetic assembly. Microscopic and spectroscopic results indicate that py nWs are anchored on the surface as well as around the edges of the multi-layered Go, promoted by the presence of chemical groups, while magnetic characterization affords additional support to our hypothesis regarding the parallel orientation of the Py NWs with respect to the GO film, and also hints the parallel stacking of GO sheets with respect to the substrate. the most striking result remains on the electrochemical performance achieved by the composite that evidences an enhanced conductive behaviour compared to a standard electrode. Such effect provides an approach to the development of permalloy nanowires/graphene oxide-based electrodes as attractive candidates for molecular sensing devices. Composite materials arise as versatile candidates that could be designed to satisfy diverse technological applications due to their multifunctional behaviour. Since composites are obtained by combining two or more materials that have different attributes, such assembly provides to the composite of unique properties. In fact, several examples exist that have demonstrated the industrial development behind their production, being the concrete a well-known composite, where its strength under compression is improved by adding metal rods, wires, mesh or cables in order to create reinforced concrete. Most of the current composites have been made by carbon allotropes 1, 2. In particular, when graphene is combined with the metallic copper, a new material around 500 times stronger than copper is achieved 3. Likewise, composites constituted by graphene and nickel yield a strength larger than 180 times of nickel 4. A soft Ni-rich ferromagnet 5, 6 , that is widely employed as a magnetic core material in diverse technological applications, such as magnetic recording heads 7-9 , microinductors and magnetoresistive random access memories (MRAM) 10, 11 , is the so called permalloy (Py), an alloy with about 20% iron and 80% nickel content. On the one hand, bulk Py exhibits large magnetic permeability, enhanced sensitivity in sensing devices 12 , as well as low coercivity and remanence, of interest in magnetic shielding 13. In addition, it is a material with nearly zero magnetostriction, an attribute that promotes an easier integration in different devices 13. Besides, the high Ni content provides an excellent corrosion resistance to the alloy...

show abstract

A read and write element for magnetic probe recording

Cited by 8 publications

References 13 publications

Heat-assisted magnetic probe recording onto a thin film with perpendicular magnetic anisotropy

Heat-assisted magnetic probe recording onto a thin film with perpendicular magnetic anisotropy

Probe-based data storage

Permalloy nanowires/graphene oxide composite with enhanced conductive properties

Contact Info

Product

Resources

About