Patterned perpendicular and longitudinal media: a magnetic recording study

Albrecht, Manfred; Ganesan, S.; Rettner, Charles; Möser, Andreas; Best, M.E.; White, Robert L.; Terris, B. D.

doi:10.1109/tmag.2003.816285

Cited by 40 publications

(24 citation statements)

References 8 publications

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“…The effect of head field gradient can be seen by comparing patterned expitaxial longitudinal Co films, where the higher longitudinal head field gradient is utilized, to the patterned CoPtCr-based perpendicular films. A dramatic increase in the write margin was observed even though the SFDs of the two films were similar (Albrecht et al 2003). Likewise, a narrower SFD would result in a wider write window for equal field gradients.…”

Section: Discrete Bit Fabrication and Testingmentioning

confidence: 88%

“…Coupons of thin CoPtCr-based perpendicular media were patterned into islands with periods as small as 56 nm by FIB and recorded on using a quasi-static read/ write tester Albrecht et al 2003Albrecht et al , 2002aLohau et al 2001a, b) as shown in Fig. 3.…”

Section: Discrete Bit Fabrication and Testingmentioning

confidence: 99%

“…For the perpendicular case the islands in the MFM image are either black or white depending on their magnetization, while for the longitudinal medium each island appears as a dipole with a black and white contrast on either side of the island. From reference(Albrecht et al 2003) …”

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confidence: 99%

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Patterned media for future magnetic data storage

2006

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One strategy to delay the onset of superparamagnetism and achieve magnetic storage densities approaching 1 Tb/in. 2 is the use of lithographically patterned magnetic media. While one of the main advantages enjoyed by magnetic recording is low cost due to use of featureless media, there are several advantages that may be realized by patterning the medium in a hard disk drive. The commercial success of patterned media will of course depend on the relative costs and gains. In particular, there are three main types of disk patterning proposed, each requiring a different length scale of patterned feature. Patterning of servo marks for maintaining the head position on-track, the fabrication of discrete tracks, and the fabrication of discrete bits have all been proposed and will be discussed. For discrete bit recording single domain magnetic islands are required, and one approach to fabricating these, by depositing magnetic films onto prepatterned substrates, is described. The switching characteristics of the islands as compared to those of the full film, along with initial recording results are presented.

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Section: Discrete Bit Fabrication and Testingmentioning

confidence: 88%

Section: Discrete Bit Fabrication and Testingmentioning

confidence: 99%

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Patterned media for future magnetic data storage

2006

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“…In particular, in the field of information storage, patterned media have been proposed as an alternative technology for increasing the information storage density [1][2][3]. In a recording scheme based on nanomagnets, each discrete particle will have an uniaxial magnetic anisotropy, so it will be magnetized in one of two possible directions at remanence [4,5], representing a binary one or zero.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of patterned magnetic nanodots by laser interference lithography

Murillo

Wolferen

Abelmann

et al. 2005

Microelectronic Engineering

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“…One of the important challenges in the applications of magnetic nanoparticles is the control of magnetic orientation of each nanoparticle, which can provide additional advantages. For example, particles with perpendicular to the plane anisotropy enable higher density for the same signal-to-noise ratio [6] and lower read and write errors [7], compared to particles with in-plane magnetization. In the absence of an external magnetic field, the magnetic moment of a ferromagnetic material aligns spontaneously along a preferred direction.…”

Section: Introductionmentioning

confidence: 99%