منابع مشابه
Fast and Slow Magnetization Processes in Magnetic Recording Media
Information loss due to thermal activation is a major concern in ultrahigh-density magnetic recording media. The usually considered mechanism is thermally activated magnetization reversal over micromagnetic energy barriers. However, micromagnetic approaches ignore local anisotropy fluctuations, which translate into a time-dependent reduction of the remanent magnetization. The effect is negligib...
متن کاملVector Angle of Remanent Magnetization
-A simple method for estimating the remanent magnetization vector angle (e) is introduced. By using this method, the orientation effects of Ba-ferrite FDs on the effective vector angle for the remanent magnetization and on recording characteristics were investigated. The resul ts show that the angle e depends on perpendicular squareness ratio (S~) and is independent from Hc. Also, the larger th...
متن کاملMicrowave assisted magnetization reversal in composite media
Shaojing Li, Boris Livshitz, H. Neal Bertram, Manfred Schabes, Thomas Schrefl, Eric E. Fullerton, and Vitaliy Lomakin Department of Electrical and Computer Engineering and the Center for Magnetic Recording Research, University of California, San Diego, California 92093, USA Hitachi San Jose Research Center, San Jose, California 95135, USA Department of Engineering Materials, University of Sheff...
متن کاملNoise in Disk Data-Recording Media
Measurements were made of recording medium noise in erased disks using an in-contact magnetoresistive element and an inductive head supported on an air bearing slider. Four types of coatings on aluminum disks were examined: thin, transition-metal alloy film, CrO,, FeCo particle, a n d y-Fe,O:,. Results obtained by means of three measurement techniques are in qualitative agreement and indicate t...
متن کاملHigh Anisotropy CoPtCrB Magnetic Recording Media
We describe the synthesis, magnetism and structure of CoPtCrB alloys with Pt concentrations from 10 43 %. The Cr concentration in the alloys was 15-17 % and the B concentration was 9-11 %. The magnetic anisotropy and coercivity increase with increasing Pt up to M 30%, plateau at M 35,000 Oe and w 6000 Oe, respectively, and then decrease. Transmission electron microscopy results show the media f...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Magnetics Society of Japan
سال: 1989
ISSN: 0285-0192,1880-4004
DOI: 10.3379/jmsjmag.13.s1_887