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In situ electron holography of the dynamic magnetic field emanating from a hard-disk drive writer
- Source :
- Nano Research, Nano Research, Springer, 2015, 8 (4), pp.1241--1249. ⟨10.1007/s12274-014-0610-0⟩, Nano Research, 2015, 8 (4), pp.1241--1249. ⟨10.1007/s12274-014-0610-0⟩, Einsle, J F, Gatel, C, Masseboeuf, A, Cours, R, Bashir, M A, Gubbins, M, Bowman, R M & Snoeck, E 2015, ' In situ electron holography of the dynamic magnetic field emanating from a hard-disk drive writer ', Nano Research, vol. 8, no. 4, pp. 1241-1249 . https://doi.org/10.1007/s12274-014-0610-0
- Publication Year :
- 2015
- Publisher :
- HAL CCSD, 2015.
-
Abstract
- International audience; The proliferation of mobile devices in society accessing data via the “cloud” is imposing a dramatic increase in the amount of information to be stored on hard disk drives (HDD) used in servers. Forecasts are that areal densities will need to increase by as much as 35% compound per annum and by 2,020 cloud storage capacity will be around 7 zettabytes corresponding to areal densities of 2 Tb/in2. This requires increased performance from the magnetic pole of the electromagnetic writer in the read/write head in the HDD. Current state-of-art writing is undertaken by morphologically complex magnetic pole of sub 100 nm dimensions, in an environment of engineered magnetic shields and it needs to deliver strong directional magnetic field to areas on the recording media around 50 nm × 13 nm. This points to the need for a method to perform direct quantitative measurements of the magnetic field generated by the write pole at the nanometer scale. Here we report on the complete in situ quantitative mapping of the magnetic field generated by a functioning write pole in operation using electron holography. The results point the way towards a new nanoscale magnetic field source to further develop in situ transmission electron microscopy.
- Subjects :
- Shields
Cloud computing
magnetic field
02 engineering and technology
01 natural sciences
Electron holography
Optics
0103 physical sciences
General Materials Science
Point (geometry)
Electrical and Electronic Engineering
010306 general physics
Nanoscopic scale
magnetic recording
Physics
[PHYS]Physics [physics]
hard disk write pole
business.industry
off-axis electron holography
in situ
021001 nanoscience & nanotechnology
Condensed Matter Physics
Atomic and Molecular Physics, and Optics
Magnetic field
Recording media
0210 nano-technology
business
Cloud storage
Electron transmission microscopy
Subjects
Details
- Language :
- English
- ISSN :
- 19980124 and 19980000
- Database :
- OpenAIRE
- Journal :
- Nano Research, Nano Research, Springer, 2015, 8 (4), pp.1241--1249. ⟨10.1007/s12274-014-0610-0⟩, Nano Research, 2015, 8 (4), pp.1241--1249. ⟨10.1007/s12274-014-0610-0⟩, Einsle, J F, Gatel, C, Masseboeuf, A, Cours, R, Bashir, M A, Gubbins, M, Bowman, R M & Snoeck, E 2015, ' In situ electron holography of the dynamic magnetic field emanating from a hard-disk drive writer ', Nano Research, vol. 8, no. 4, pp. 1241-1249 . https://doi.org/10.1007/s12274-014-0610-0
- Accession number :
- edsair.doi.dedup.....11515175d8d6fde8219d70224abba85d