Magnetic alloys in nanoscale biomaterials
| Autor: | Kate L. Klein, Michael L. Simpson, Ian M. Anderson, Anatoli V. Melechko, James R Thompson, Th. Leventouri, Timothy E. McKnight, K. D. Sorge, Philip D. Rack, Jason D. Fowlkes |
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| Rok vydání: | 2006 |
| Předmět: |
Materials science
Carbon nanofiber Metallurgy Alloy Metals and Alloys Nanoparticle Nanotechnology Chemical vapor deposition engineering.material Coercivity Condensed Matter Physics Chemical engineering Mechanics of Materials Plasma-enhanced chemical vapor deposition X-ray crystallography engineering Magnetic alloy |
| Zdroj: | Metallurgical and Materials Transactions A. 37:3423-3427 |
| ISSN: | 1543-1940 1073-5623 |
| DOI: | 10.1007/s11661-006-1036-4 |
| Popis: | Fe−Co composition gradient and Fe−Pt multilayer alloy films were tested as catalysts for groving vertically aligned carbon nanofibers (VACNFs) by plasma-enhanced chemical vapor deposition (PECVD). The Fe−Co film yielded nanofibers with alloy tips in a wide compositional range varying from 8.15 pct Fe at the Co-rich end to 46.29 pct Fe in the middle of the wafer as determined by energy-dispersive X-ray analysis. Two Fe−Co cubic phases (SG Pm3m, \({\text{P}}m\overline 3 m\) were identified by preliminary X-ray diffraction (XRD) measurements. Magnetic measurements showed a substantially greater hysteresis loop area and coercivity in Fe−Co catalyst nanoparticles as compared to the asdeposited Fe−Co film. The Fe−Pt film did not break into FePt alloy nanoparticles under the applied processing parameters and thus the utility of FePt as a VACNF catalyst has been inconclusive. |
| Databáze: | OpenAIRE |
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