Writing and reading 7.5 gbits/in2 longitudinal quantized magnetic disk using magnetic force microscope tips

Linshu Kong; Lei Zhuang; Stephen Y. Chou

doi:10.1109/20.617830

Writing and reading 7.5 gbits/in² longitudinal quantized magnetic disk using magnetic force microscope tips

Linshu Kong, Lei Zhuang, Stephen Y. Chou

Research output: Contribution to journal › Article › peer-review

38 Scopus citations

Abstract

Quantized magnetic disks (QMDs) consisting of longitudinal single-domain Ni bars with densities from 3 Gbits/in2 to 10 Gbits/in2 were fabricated using nanoimprint lithography and a lift-off process. Two different types of MFM tips were used in the writing and reading process, one for erasing and writing, another for reading; both were magnetically 'hard'. The QMDs were first erased by aligning all bars with the write-tip scanning the entire sample, then written using lithography software in NanoScope III. Error-free results were obtained up to 7.5 Gbits/in2 despite the poorly-defined magnetic field from the write-tip and despite not having a feedback control for the write-tip position.

Original language	English (US)
Pages (from-to)	3019-3021
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	33
Issue number	5 PART 1
DOIs	https://doi.org/10.1109/20.617830
State	Published - 1997
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/20.617830

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title = "Writing and reading 7.5 gbits/in2 longitudinal quantized magnetic disk using magnetic force microscope tips",

abstract = "Quantized magnetic disks (QMDs) consisting of longitudinal single-domain Ni bars with densities from 3 Gbits/in2 to 10 Gbits/in2 were fabricated using nanoimprint lithography and a lift-off process. Two different types of MFM tips were used in the writing and reading process, one for erasing and writing, another for reading; both were magnetically 'hard'. The QMDs were first erased by aligning all bars with the write-tip scanning the entire sample, then written using lithography software in NanoScope III. Error-free results were obtained up to 7.5 Gbits/in2 despite the poorly-defined magnetic field from the write-tip and despite not having a feedback control for the write-tip position.",

author = "Linshu Kong and Lei Zhuang and Chou, {Stephen Y.}",

note = "Funding Information: Manuscript received Jan. 28, 1997. L. Kong, e-mail [email protected],f ax (612) 625-4583; phone (612) 624-5285. This work was supported in part by ONR and DARPA.",

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doi = "10.1109/20.617830",

language = "English (US)",

volume = "33",

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journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

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T1 - Writing and reading 7.5 gbits/in2 longitudinal quantized magnetic disk using magnetic force microscope tips

AU - Kong, Linshu

AU - Zhuang, Lei

AU - Chou, Stephen Y.

N1 - Funding Information: Manuscript received Jan. 28, 1997. L. Kong, e-mail [email protected],f ax (612) 625-4583; phone (612) 624-5285. This work was supported in part by ONR and DARPA.

PY - 1997

Y1 - 1997

N2 - Quantized magnetic disks (QMDs) consisting of longitudinal single-domain Ni bars with densities from 3 Gbits/in2 to 10 Gbits/in2 were fabricated using nanoimprint lithography and a lift-off process. Two different types of MFM tips were used in the writing and reading process, one for erasing and writing, another for reading; both were magnetically 'hard'. The QMDs were first erased by aligning all bars with the write-tip scanning the entire sample, then written using lithography software in NanoScope III. Error-free results were obtained up to 7.5 Gbits/in2 despite the poorly-defined magnetic field from the write-tip and despite not having a feedback control for the write-tip position.

AB - Quantized magnetic disks (QMDs) consisting of longitudinal single-domain Ni bars with densities from 3 Gbits/in2 to 10 Gbits/in2 were fabricated using nanoimprint lithography and a lift-off process. Two different types of MFM tips were used in the writing and reading process, one for erasing and writing, another for reading; both were magnetically 'hard'. The QMDs were first erased by aligning all bars with the write-tip scanning the entire sample, then written using lithography software in NanoScope III. Error-free results were obtained up to 7.5 Gbits/in2 despite the poorly-defined magnetic field from the write-tip and despite not having a feedback control for the write-tip position.

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Writing and reading 7.5 gbits/in² longitudinal quantized magnetic disk using magnetic force microscope tips

Abstract

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