Chemical synthesis of nanomagnetic arrays for information storage
The project which was undertaken under the scope of this work was the chemical synthesis of nanomagnetic media for information storage media, controlled self assembly of magnetic nanoparticles in various size and shapes has drawn tremendous interese as it offers a convenient tool to develop high den...
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| Format: | Research Report |
| Language: | English |
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2009
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| Online Access: | http://hdl.handle.net/10356/17237 |
| _version_ | 1826112979909738496 |
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| author | Raju V Ramanujan |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Raju V Ramanujan |
| author_sort | Raju V Ramanujan |
| collection | NTU |
| description | The project which was undertaken under the scope of this work was the chemical synthesis of nanomagnetic media for information storage media, controlled self assembly of magnetic nanoparticles in various size and shapes has drawn tremendous interese as it offers a convenient tool to develop high density data storage devices. Patterned magnetic nanostructures have been fabricated using chemical synthesis techniques. Template assisted assembly of cobalt and cobalt ferrite "nanobowls" in a periodic arrangement with sufficiently high coercivity values for data storage applications has been achieved using colloidal crystal templating. Cobalt nanowires have also been synthesized by applying an external magnetic on cobalt nanoparticles showing the effect of shape anisotropy on magnetic peoperties. Elongated nanostructures of cobalt were also synthesized by fragmentation of "rod" to chain shape transition due to Rayleigh instability effects. Nanowire arrays of cobalt and cobalt-iron alloys have been chemically synthesized by an anodized aluminum oxide (AAO) template assisted assembly technique. The effect of textured growth on magnetic properties has been evaluated. These chains showed the effect of shape anisotropy on magnetic properties. Reverse micelle synthesis of cobalt nanoelements in various shapes has been conducted and characterized in this work, cobalt nanoelements were synthesized in h.c.p., h.c.p. + f.c.c., f.c.c. crystal structures. Coercivity values in a cobalt ferrite and cobalt-iron alloys have also been synthesized with interesting properties and their magnetic properties were measured. A number of publications, invited conference talks, encyclopedia article, symposium chair recognition etc. have resulted from this work. |
| first_indexed | 2024-10-01T03:15:41Z |
| format | Research Report |
| id | ntu-10356/17237 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:15:41Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | ntu-10356/172372023-07-08T06:39:19Z Chemical synthesis of nanomagnetic arrays for information storage Raju V Ramanujan School of Materials Science & Engineering DRNTU::Engineering::Materials::Nanostructured materials The project which was undertaken under the scope of this work was the chemical synthesis of nanomagnetic media for information storage media, controlled self assembly of magnetic nanoparticles in various size and shapes has drawn tremendous interese as it offers a convenient tool to develop high density data storage devices. Patterned magnetic nanostructures have been fabricated using chemical synthesis techniques. Template assisted assembly of cobalt and cobalt ferrite "nanobowls" in a periodic arrangement with sufficiently high coercivity values for data storage applications has been achieved using colloidal crystal templating. Cobalt nanowires have also been synthesized by applying an external magnetic on cobalt nanoparticles showing the effect of shape anisotropy on magnetic peoperties. Elongated nanostructures of cobalt were also synthesized by fragmentation of "rod" to chain shape transition due to Rayleigh instability effects. Nanowire arrays of cobalt and cobalt-iron alloys have been chemically synthesized by an anodized aluminum oxide (AAO) template assisted assembly technique. The effect of textured growth on magnetic properties has been evaluated. These chains showed the effect of shape anisotropy on magnetic properties. Reverse micelle synthesis of cobalt nanoelements in various shapes has been conducted and characterized in this work, cobalt nanoelements were synthesized in h.c.p., h.c.p. + f.c.c., f.c.c. crystal structures. Coercivity values in a cobalt ferrite and cobalt-iron alloys have also been synthesized with interesting properties and their magnetic properties were measured. A number of publications, invited conference talks, encyclopedia article, symposium chair recognition etc. have resulted from this work. RG 113/05 2009-06-02T01:36:34Z 2009-06-02T01:36:34Z 2007 2007 Research Report http://hdl.handle.net/10356/17237 en 13 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Materials::Nanostructured materials Raju V Ramanujan Chemical synthesis of nanomagnetic arrays for information storage |
| title | Chemical synthesis of nanomagnetic arrays for information storage |
| title_full | Chemical synthesis of nanomagnetic arrays for information storage |
| title_fullStr | Chemical synthesis of nanomagnetic arrays for information storage |
| title_full_unstemmed | Chemical synthesis of nanomagnetic arrays for information storage |
| title_short | Chemical synthesis of nanomagnetic arrays for information storage |
| title_sort | chemical synthesis of nanomagnetic arrays for information storage |
| topic | DRNTU::Engineering::Materials::Nanostructured materials |
| url | http://hdl.handle.net/10356/17237 |
| work_keys_str_mv | AT rajuvramanujan chemicalsynthesisofnanomagneticarraysforinformationstorage |