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dc.contributor.authorKuo, CTen_US
dc.contributor.authorLin, CHen_US
dc.contributor.authorLo, AYen_US
dc.date.accessioned2014-12-08T15:41:17Z-
dc.date.available2014-12-08T15:41:17Z-
dc.date.issued2003-03-01en_US
dc.identifier.issn0925-9635en_US
dc.identifier.urihttp://dx.doi.org/10.1016/S0925-9635(02)00231-5en_US
dc.identifier.urihttp://hdl.handle.net/11536/28067-
dc.description.abstractNano-sized magnetic particles were successfully used as the catalysts to synthesize magnetic metal-encapsulated carbon nanotubes (CNTs) or nanoparticles on Si wafers in a microwave plasma electron cyclotron resonance chemical vapor deposition (ECR-CVD) system with CH4 and/or H-2 as source gases. The magnetic catalyst materials, including Fe-Pt, Co-Pt, Nd2Fe14B, Fe and Fe-Ni, were first deposited on Si wafers by a physical vapor deposition (PVD) method, with subsequent plasma treatment for nanoparticle transformation. The main process parameters include catalyst materials, hydrogen plasma catalyst pretreatment and deposition temperature. For applications in magnetic media, the process has the following advantages: perpendicularly aligned CNTs or nanoparticles; tip-growth CNTs; well-distributed magnetic particles; detectable magnetic field in each particle; high tube number density (up to 134 Gtubes/inch(2) for Fe-assisted CNTs); favorable catalyst size; higher shape and induced anisotropy; and nanostructures that can be manipulated. The catalyst particle sizes of Fe, Nb2Fe14B and Fe-Pt (35-40 mn in diameter) are uniform and greater than but close to the critical optimum size or single domain size, which favor a higher coercive force. The greatest coercive force can reach 750 Oe for Fe-assisted CNTs at a deposition temperature of 715 degreesC, which is comparable with values reported in the literature. The coercive force difference between the vertical and horizontal directions can reach 300 Oe for Fe-assisted CNTs, and 355 Oe for Nb2Fe14B-assisted CNTs. (C) 2002 Elsevier Science B.V. All rights reserved.en_US
dc.language.isoen_USen_US
dc.subjectcarbon nanotubesen_US
dc.subjectcatalysten_US
dc.subjectcyclotron resonance CVDen_US
dc.subjectmagnetic recordingen_US
dc.subjectperpendicular recording mediaen_US
dc.titleFeasibility studies of magnetic particle-embedded carbon nanotubes for perpendicular recording mediaen_US
dc.typeArticle; Proceedings Paperen_US
dc.identifier.doi10.1016/S0925-9635(02)00231-5en_US
dc.identifier.journalDIAMOND AND RELATED MATERIALSen_US
dc.citation.volume12en_US
dc.citation.issue3-7en_US
dc.citation.spage799en_US
dc.citation.epage805en_US
dc.contributor.department材料科學與工程學系zh_TW
dc.contributor.departmentDepartment of Materials Science and Engineeringen_US
dc.identifier.wosnumberWOS:000182872000109-
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