Effect of continuous layer in CGC perpendicular recording media

Sonobe, Y.; Tham, Kim Kong; Umezawa, Takeshi; Takasu, C.; Dumaya, Jo Alvin; Leo, P.

doi:10.1016/j.jmmm.2006.01.164

Cited by 14 publications

(8 citation statements)

References 7 publications

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“…The recoil loops are measured with applied field at . All these results agree with the previous work [11], [12].…”

Section: Methodssupporting

confidence: 94%

“…CGC media show Digital Object Identifier 10.1109/TMAG.2006.888227 Color versions of one or more of the figures in this paper are available online at http://ieeexplore.org. significant SNR improvement of over 1 dB that cannot be explained simply by a "distribution narrowing effect" [11] and/or a "transition smoothing effect" [13] as proposed previously. Study of magnetization reversal process in the CGC media reveals the mechanism of the improvement.…”

Section: Introductionmentioning

confidence: 58%

“…The SFD becomes narrower for media with a thicker continuous layer. This narrower SFD reflects in smaller [11] in CGC media, where is determined from the difference of recoil loop and -loop at half of saturation magnetization . The recoil loops are measured with applied field at .…”

Section: Methodsmentioning

confidence: 99%

“…In this paper, we describe experimental verification of magnetic properties and read-write properties of a CGC media with CoCrPt-SiO granular layer [11], [12]. CGC media show Digital Object Identifier 10.1109/TMAG.2006.888227 Color versions of one or more of the figures in this paper are available online at http://ieeexplore.org.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Magnetic and Read–Write Properties of Coupled Granular/Continuous Perpendicular Recording Media and Magnetization Reversal Process

Tham¹,

Sonobe²,

Wago³

2007

IEEE Trans. Magn.

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Coupled granular/continuous (CGC) media are formed by depositing a 6 nm Co/Pd multilayer onto a CoCrPt-SiO 2 granular magnetic layer. The multilayer reduces magnetic saturation field from 11.4 to 7.2 kOe. The lower is reflected in the recording overwrite (OW) improvement of around 20 dB. The thermal stability factor also increases with addition of the multilayer, from 60 to 100, resulting in the improvement of thermal stability for CGC media. The origin of the increase derives from the larger activation volume. The CGC media has coherent magnetization reversal and very weak exchange coupling, similar to the base granular media. The coherent magnetization reversal with very weak exchange coupling contributes to a signal-to-noise-ratio (SNR) improvement of around 1 dB. These results suggest that CGC media have a recording advantage over the conventional structure media, and are a promising approach to avoid the limitations of the "magnetic recording tri-lemma" and realize future ultrahigh density recording media.Index Terms-Activation volume, angular dependence of , cluster size, plane view TEM image.

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“…The recoil loops are measured with applied field at . All these results agree with the previous work [11], [12].…”

Section: Methodssupporting

confidence: 94%

Section: Introductionmentioning

confidence: 58%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Magnetic and Read–Write Properties of Coupled Granular/Continuous Perpendicular Recording Media and Magnetization Reversal Process

Tham¹,

Sonobe²,

Wago³

2007

IEEE Trans. Magn.

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“…Since CoCrPt-oxide composite granular layers were developed [4], many experiments on capped media have used CoCrPt-oxide granular layers in combination with various capping layers, such as CoCrPt alloys, amorphous TbFeCo alloys, and (Co/Pd) n multilayers [5][6][7]. Although these have demonstrated superior recording capabilities under several optimum conditions of the capping layer, the requirements and reasons for the improved performance are still unclear.…”

Section: Introductionmentioning

confidence: 99%