21:I[432972,["/_next/static/chunks/bb923814e1f4d2e9.js","/_next/static/chunks/dd3ee9f5b7716ca6.js","/_next/static/chunks/4204a0ae82542ca8.js","/_next/static/chunks/1270dead247da766.js","/_next/static/chunks/6e1aa89a642f40be.js","/_next/static/chunks/cd5e572bc3e4eb92.js","/_next/static/chunks/8ffd0b71567920d8.js","/_next/static/chunks/67ea6dfd21f16c5f.js","/_next/static/chunks/24eb4379f68013fd.js","/_next/static/chunks/b8cd775ffdf935bd.js","/_next/static/chunks/983103cd9eb7b428.js","/_next/static/chunks/d4ac9dcf27f6ff52.js","/_next/static/chunks/294b9525248c8e5f.js"],"default"] 22:T431,Amorphous thin films of Sm 100-x Co x ( 75 < x < 90 ) were prepared by vacuum deposition in a magnetic field. The preparation conditions and magnetic properties are described. The films exhibit a pronounced uniaxial anisotropy in the film plane with a rectangular shaped hysteresis loop. The magnetization and coercivity are mainly determined by composition. With increasing Sm content the coercivity increases from 30 to 100 kA/m. The magnetization reversal is studied by the angular dependence of the hysteresis properties and by domain observations indicating a nonuniform reversal process. The recording performance measured on 5-in disks shows an improvement in recording density and signal-to-noise ratio compared to traditional longitudinal recording media.23:T489,The effect of saturation remanence and coercivity on the short wavelength reproduce signal has been examined. For constant current unbiased sinewave recording on tapes of 4.5μm coating thickness, set to peak on each tape the shortest wavelength (λ=1.2μm), the data can be interpreted in terms of an effective spacing loss with an effective recording depth of 0.6μm or in terms of a loss line evaluation of the major hysteresis loop of the tapes. Within the range of remanence and coercivity under investigation, the reproduce signal can be approximated by M R ⁿ H c ^m where n and m are 0.75 and 0.25 at 23.5μm, 0.4 and 0.6 at 5μm, and 0.08 and 0.92 at 1.2μm wavelength respectively, i.e. the influence of coercivity predominates at short wavelengths.

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