scholarly journals 5-1 High Recording Density Technologies on Particulate Magnetic Tape

2016 ◽  
Vol 70 (5) ◽  
pp. 398-401
Author(s):  
Masahito Oyanagi
Keyword(s):  
Magnetic Tape ◽  
Recording Density

Materials for Magnetic-Tape Media

MRS Bulletin ◽  
1996 ◽  
Vol 21 (9) ◽  
pp. 35-41 ◽  
Author(s):  
Seiichi Onodera ◽  
Hirofumi Kondo ◽  
Takahiro Kawana
Keyword(s):  
Thin Film ◽  
Magnetic Recording ◽  
Magnetic Tape ◽  
Magnetic Particles ◽  
Low Cost ◽  
Video Recording ◽  
Magnetic Thin Films ◽  
Optical Recording ◽  
Digital Data ◽  
Recording Density

Magnetic recording has been responsible for the widespread and inexpensive recording of sound and video. Despite the availability of other means of storing data, such as optical recording and semiconductor devices, flexible magnetic-recording media have advantages such as (1) low cost, (2) stable storage, (3) a relatively high data rate, (4) a relatively short seek time, and (5) high-volumetric information density.The first commercially available magnetic-recording tapes were produced in 1947 by the 3M Company. Since that time, magnetic tapes have developed rapidly for use in audio, video, and digital-data recording systems.The linear-analogue technique is commonly used for most audio recorders. The magnetic tape is transported at a speed of several cm/s over a stationary head. On the other hand, helical-scanning rotary heads were developed for video recording, which afforded a high head-to-tape speed of more than several m/s and high recording-density capabilities. However high relative speed causes wear of the tape. The success of a tape in actual use depends critically on its tribological properties.Magnetic media are divided into two groups: (1) particulate media where magnetic particles are dispersed in a polymer binder with some additives and coated onto the substrate and (2) thin-film media in which monolithic, magnetic thin films are deposited onto the substrate in vacuum. The overwhelming preponderance of media fabricated to date have been coated media. However continuous demand for increasingly higher recording density has led to thin-film media.

Demonstration of the Use of Tape-Recorded Information from a High Vacuum Electron Microscope

1969 ◽  
Vol 27 ◽  
pp. 218-219
Author(s):  
Richard E. Hartman ◽  
Roberta S. Hartman ◽  
Peter L. Ramos
Keyword(s):  
Information Retrieval ◽  
Electron Microscope ◽  
Magnetic Tape ◽  
High Vacuum ◽  
Data Retrieval ◽  
Electronic Information ◽  
Electronic Data ◽  
Subsequent Processing ◽  
Continuous Record

We have long felt that some form of electronic information retrieval would be more desirable than conventional photographic methods in a high vacuum electron microscope for various reasons. The most obvious of these is the fact that with electronic data retrieval the major source of gas load is removed from the instrument. An equally important reason is that if any subsequent analysis of the data is to be made, a continuous record on magnetic tape gives a much larger quantity of data and gives it in a form far more satisfactory for subsequent processing.

A magnetic-tape digital-recording equipment

1956 ◽  
Vol 103 (2S) ◽  
pp. 346-353
Author(s):  
A.A. Robinson ◽  
F. McAulay ◽  
A.H. Banks ◽  
D. Hogg
Keyword(s):  
Magnetic Tape ◽  
Digital Recording ◽  
Recording Equipment
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