High Coercivity Recording Media Prepared Using Non-heating Process.

High 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...

CoFe2O4 nanostructures with high coercivity

Patterning of L10 FePt nanoparticles with ultra-high coercivity for bit-patterned media.

L10-ordered FePt nanoparticles (NPs) with ultra-high coercivity were directly prepared from a new metallopolyyne using a one-step pyrolysis method. The chemical ordering, morphology and magnetic properties of the as-synthesized FePt NPs have been studied. Magnetic measurements show the coercivity of these FePt NPs is as high as 3.6 T. Comparison of NPs synthesized under the Ar and Ar/H2 atmosph...

High-Coercivity CoCrPt–Ti Perpendicular Media by In Situ Interdiffusion of CrMn Ultrathin Overlayers

We have investigated the magnetic and structural properties of CoCrPt perpendicular films with respect to in situ interdiffusion of CrMn from top layers. We have observed a coercivity of 5700 Oe in the films with a thin CrMn overlayer, which is greater than two times larger than the similar type of films without a CrMn overlayer. This increment is attributed to the decoupling of grains by diffu...

The Recording of Interactive Media Streams Using a Common Framework1

The development of real-time transport protocols for the Internet has been a focus of research for several years. Meanwhile, the Real-Time Transport Protocol (RTP) is a well accepted standard that is widely deployed for the transmission of video and audio streams. The RTP specification, combined with a companion RTP profile, covers common aspects of real-time transmissions of video and audio in...