The design and optimization of disk structures for MAMMOS/MSR magneto-optic recording

Hendren, William; Atkinson, R.; Pollard, Robert; Salter, Ian; Wright, C. David; Clegg, W.W.; Jenkins, David

doi:10.1088/0022-3727/38/14/004

Cited by 8 publications

(3 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Data outside the heated area remains unaffected and secure providing the thermal response of the material is tailored to control lateral diffusion. However, although the basis of a briefly successful magneto-optic removable disk technology and still subject of considerable interest because of its potential to support techniques such as MAMMOS [2], application of this type of heating process to 'conventional' perpendicular magnetic recording to produce a HAMR system capable of supporting areal densities of 1 Tbit in −2 is demanding in the extreme. All aspects of realizing such a system involve true nanoscale engineering.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of nano-particulate PtCo media for ultra-high density perpendicular magnetic recording

et al. 2007

View full text Add to dashboard Cite

The year-on-year growth in areal recording density maintained now for half a century by the hard disk industry has required a corresponding reduction in the size of the magnetic grains comprising the storage media employed. Grain dimensions are now such that the performance of materials which thus far have served the industry well can no longer be maintained as further reduction in their volume risks breaching the superparamagnetic limit with the attendant loss of data integrity. The high magnetocrystalline anisotropy of the Ll0 phase of PtCo allows particles as small as 4 nm diameter to remain magnetically stable in the elevated temperature environment typical of disk drive systems. A non-interacting dispersion of nanomagnetic particles suspended in an inert non-magnetic host such that each has its anisotropy axis directed perpendicular to the surface of the medium now constitutes the new ideal for a recording medium. Fabrication by a novel combination of conventional sputtering and thermal processing technologies of a medium closely approximating this ideal is demonstrated. An optimized two-stage fabrication process produces a near mono-dispersion of particles with magnetic activation volumes centred about 5 × 10−26 m−3 and crystallized in the L10 phase with an orientated tetragonal structure. The characteristics of this medium are discussed as a function of composition and crystalline structure. In the absence of a thermally assisted recording head, experiments are conducted on a degraded form of the medium that is shown to support perpendicular recording at linear densities in excess of 240 kfci (D50 point).

show abstract

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of nano-particulate PtCo media for ultra-high density perpendicular magnetic recording

et al. 2007

View full text Add to dashboard Cite

show abstract

“…The second one designed for the operating wavelength of 410 nm employed the layer sequence AlN/Fe/AlN/Cu/Si [14]. In the past, quadri-layers formed by a magnetic layer sandwiched between dielectrics on an Al reflector received attention as media for high capacity MO recording disks [17][18][19][20]. The degree to which the desired MO performance was achieved in the grown sandwiches was evaluated with MO spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Analytical analysis of a multilayer structure with ultrathin Fe film for magneto-optical sensing

Višňovský¹,

Lišková-Jakubisová²,

Harward³

et al. 2013

Opt. Express

View full text Add to dashboard Cite

Magneto-optic (MO) response in nanostructures with ultrathin Fe considered for the MO mapping of current pulses with a two-dimensional diffraction limited resolution is investigated in detail. The structures consist of an ultrathin Fe layer sandwiched with dielectric layers, deposited on a reflector and covered by a noble metal protecting layer. The structures are modeled as five-layer systems with abrupt interfaces. Analytical expressions are provided that are useful in the search for the maximum of MO reflected wave amplitude polarized perpendicular to the incident linearly polarized wave, |ryx((05))|. The procedure of finding the maximal |ryx((05))| is illustrated on the structures with ultrathin Fe at the laser wavelength of 632.8 nm. The maximal |ryx((05))| of 0.018347 was achieved in the structure AlN(52 nm)/Fe(15 nm)/AlN(26 nm)/Au. The deposition of a 5 nm protecting Au layer reduced |ryx((05))| by 6 per cent.

show abstract

“…Usually, a carefully designed quadrilayer system containing the magnetic thin layer can realize the ultimate performance of the magnetic medium for MO readout, using the polar Kerr effect [11][12][13]. Typically, such quadrilayer designs include a reflective layer as mirror, a magnetic layer, a spacer and a capping layer.…”

Section: Introductionmentioning

confidence: 99%

Cavity enhancement of the magneto-optic Kerr effect in glass/Al/SnO2/PtMnSb/SnO2 structure

Moradi

Ghanaatshoar

2010

Optics Communications

View full text Add to dashboard Cite

The design and optimization of disk structures for MAMMOS/MSR magneto-optic recording

Cited by 8 publications

References 21 publications

Fabrication and characterization of nano-particulate PtCo media for ultra-high density perpendicular magnetic recording

Fabrication and characterization of nano-particulate PtCo media for ultra-high density perpendicular magnetic recording

Analytical analysis of a multilayer structure with ultrathin Fe film for magneto-optical sensing

Cavity enhancement of the magneto-optic Kerr effect in glass/Al/SnO2/PtMnSb/SnO2 structure

Contact Info

Product

Resources

About