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25.14
Displaying 1-10 of 10 articles from this issue
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Article type: Cover
Pages Cover1-
Published: February 16, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (14K) -
Article type: Index
Pages Toc1-
Published: February 16, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (34K) -
Ryoichi Mukai, Takuya UzumakiArticle type: Article
Session ID: MMS2001-16
Published: February 16, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSA medium formation technique for fabricating Co_<90>Pt_<10> magnetic film with uniform grain size was developed, whereby the signal-to-medium-noise ratio (S/Nm) can be improved. In this technique, a nucleation site layer (NSL) composed of a monolayer of closely packed the CoPt islands is produced on SiO_2/Si disk substrate. The NSL is fabricated by deposition of Co_<90>Pt_<10> thin film and heat treatment. In the deposition of Cr underlayer, the island forces nucleation of Cr grain to start from the island. In this medium formation, nucleation of Co_<90>Pt_<10> magnetic grain to start from the Cr grain to underlayer is created. Therefoe, Therefoe, Co_<90>Pt?<10> film with uniform grain size is produced.View full abstractDownload PDF (1471K) -
E. Nakashio, J. Sugawara, S. Onoe, S. KumagaiArticle type: Article
Session ID: MMS2001-17
Published: February 16, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSLongitudinal bias method using long -range exchange coupling, which was observed between an IrMn layer and a NiFe/CoFe bilayer across Cu interlayer, was investigated for magnetic read heads. The exchange coupling field could be changed in the layered film consisting of Ta/Nife/Cu/IrMn. The tunnel magnetoresistive readers, which have tunnel magnetoresistance ratio of about 30%, showed output voltage of 9080 μV_<p-p> which was comparable to that of a typical GMR reader for 7.5Gbits/inch^2 hard disk drives.View full abstractDownload PDF (914K) -
Single Pole Head -like T-shaped Thin Film Ring Head by Dual Integrations Perpendicular to each otherAkio OhtsuboArticle type: Article
Session ID: MMS2001-18
Published: February 16, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe T-shaped ring head consists of a londitudinal high Bs laminated film core as leading pole, one turn coil around its tip and a transverse low Bs film core. This proposed structure emanates single pole head-like recording field on perpendicular single layer medium, resulting high density performance. Flux flows through magnetization rotation in the londitudinal laminated film core with suitable Hk, resulting high rate and recording sensitivity. The head fabrication is as follows, integration of the londitudinal cores on virgin wafers, stacking and glass bonding into a block, slicing into embedded wafers, integration of the transeverse cores, and machining into individual contact sliders.View full abstractDownload PDF (1068K) -
Shigeki MORI, Takayuki HOSHINO, Goro OBINATA, Kazuhiro OUCHIArticle type: Article
Session ID: MMS2001-19
Published: February 16, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSA linear actuator which was constructed with a linear air bearing and a voice coil motor was investigated. The actuator system is suitable for ultra-precise track following and high speed-seeking. This system had resonance frequency two times as high as a conventional rotary type. As the result of servo-tracking by using this actuator with D-MIG head, the tracking system can follow the track at precision within 1/20 track width of the head. Furthermore, the actuator can feed at 10 nm resolution by using an optical fiber displacement sensor.View full abstractDownload PDF (801K) -
Takao Sugawara, Shin Tomimoto, Kazuhito IchiharaArticle type: Article
Session ID: MMS2001-20
Published: February 16, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSSince there is degradation of SNR along with increasing areal density of hard disk drive, it is getting difficult to maintain adequate raw error rate and a role of ECC is getting more important. A current trend of read channels tends to have RLL codes with long code length for the sake of high code rate, but on the other hand error propagation is becoming controversial problem. Meanwhile, accomplishment of high areal density needs read/write design considering not only linear density but also track density. We developed a method for evaluating error rate after ECC considering position fluctuation of a head in cross track direction. The results obtained from this method show good agreement with real data.View full abstractDownload PDF (514K) -
Kazuhito Ichihara, Takao Sugawara, Shin TomimotoArticle type: Article
Session ID: MMS2001-21
Published: February 16, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn designing a read channel chip, one of the key components of a hard disk drive, we need to construct the channel model considering real channel characteristics. We study two read channel simulation systems using real data. One system directly utilizes real data acquired from a hard disk drive and shows excellent agreement with error events of the drive. The other system constructed of some signal-dependent parameters extracted from real data is AR channel model system. This system shows good agreement with the drive data in respect to error events and shortens simulation cost.View full abstractDownload PDF (627K) -
Article type: Appendix
Pages App1-
Published: February 16, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (87K) -
Article type: Cover
Pages Cover2-
Published: February 16, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (68K)
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