Observation of underlayer domain noise in perpendicular recording disks
The authors employed a disk test system to extract samples of media noise from dual layer perpendicular recording disks. The samples of the media noise show it to have a distinct high and low frequency structure. The high frequency structure is the noise arising from the micromagnetics of the CoCr r...
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| Veröffentlicht in: | IEEE transactions on magnetics 1993-11, Vol.29 (6), p.3742-3744 |
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| container_end_page | 3744 |
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| container_issue | 6 |
| container_start_page | 3742 |
| container_title | IEEE transactions on magnetics |
| container_volume | 29 |
| creator | Darragh, N.R. Mapps, D.J. Donnelly, T. Wade, J.G. Hoinville, J.R. |
| description | The authors employed a disk test system to extract samples of media noise from dual layer perpendicular recording disks. The samples of the media noise show it to have a distinct high and low frequency structure. The high frequency structure is the noise arising from the micromagnetics of the CoCr recording layer. The low frequency structure does not arise from the recording layer but from the NiFe underlayer. Using an imaging technique, the underlayer noise is characterized by lines that span inwards from the outside diameter of the disk. The appearance and behavior of these lines shows them to be attributable to domain walls in the underlayer of the disk.< > |
| doi_str_mv | 10.1109/20.281288 |
| format | Article |
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The samples of the media noise show it to have a distinct high and low frequency structure. The high frequency structure is the noise arising from the micromagnetics of the CoCr recording layer. The low frequency structure does not arise from the recording layer but from the NiFe underlayer. Using an imaging technique, the underlayer noise is characterized by lines that span inwards from the outside diameter of the disk. 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The samples of the media noise show it to have a distinct high and low frequency structure. The high frequency structure is the noise arising from the micromagnetics of the CoCr recording layer. The low frequency structure does not arise from the recording layer but from the NiFe underlayer. Using an imaging technique, the underlayer noise is characterized by lines that span inwards from the outside diameter of the disk. The appearance and behavior of these lines shows them to be attributable to domain walls in the underlayer of the disk.< ></description><subject>Applied sciences</subject><subject>Disk recording</subject><subject>Electronics</subject><subject>Exact sciences and technology</subject><subject>Frequency</subject><subject>Laser noise</subject><subject>Magnetic and optical mass memories</subject><subject>Magnetic heads</subject><subject>Magnetic noise</subject><subject>Magnetic recording</subject><subject>Noise figure</subject><subject>Noise reduction</subject><subject>Oscilloscopes</subject><subject>Perpendicular magnetic recording</subject><subject>Storage and reproduction of information</subject><issn>0018-9464</issn><issn>1941-0069</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1993</creationdate><recordtype>article</recordtype><recordid>eNo9kM1LAzEQxYMoWKsHr55yEMHD1iSb3U2OUmoVCr3oOeRjVqLbZE26Qv97V7b0NDPMb97wHkK3lCwoJfKJkQUTlAlxhmZUcloQUstzNCOEikLyml-iq5y_xpFXlMzQemsypF-99zHg2OIhOEidPkDCLu60DzhEnwGPTQ-ph-C8HTqdcAIbk_PhEzufv_M1umh1l-HmWOfo42X1vnwtNtv12_J5U9iS1PsCSgAwsiypEY0lFTe1YZY2lTRQcyspgHVcStc2umSNaTmXtqyINsAa50Q5Rw-Tbp_izwB5r3Y-W-g6HSAOWY3mRUPGB3P0OIE2xZwTtKpPfqfTQVGi_qNSjKgpqpG9P4rqbHXXJh2sz6cDzqqKCjlidxPmRxOn7VHjD40VcWQ</recordid><startdate>19931101</startdate><enddate>19931101</enddate><creator>Darragh, N.R.</creator><creator>Mapps, D.J.</creator><creator>Donnelly, T.</creator><creator>Wade, J.G.</creator><creator>Hoinville, J.R.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>19931101</creationdate><title>Observation of underlayer domain noise in perpendicular recording disks</title><author>Darragh, N.R. ; Mapps, D.J. ; Donnelly, T. ; Wade, J.G. ; Hoinville, J.R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c306t-e3eeeb9331b87c054b6b2c1759be64c91eecd499df7a327bf449c350abe27dd83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1993</creationdate><topic>Applied sciences</topic><topic>Disk recording</topic><topic>Electronics</topic><topic>Exact sciences and technology</topic><topic>Frequency</topic><topic>Laser noise</topic><topic>Magnetic and optical mass memories</topic><topic>Magnetic heads</topic><topic>Magnetic noise</topic><topic>Magnetic recording</topic><topic>Noise figure</topic><topic>Noise reduction</topic><topic>Oscilloscopes</topic><topic>Perpendicular magnetic recording</topic><topic>Storage and reproduction of information</topic><toplevel>online_resources</toplevel><creatorcontrib>Darragh, N.R.</creatorcontrib><creatorcontrib>Mapps, D.J.</creatorcontrib><creatorcontrib>Donnelly, T.</creatorcontrib><creatorcontrib>Wade, J.G.</creatorcontrib><creatorcontrib>Hoinville, J.R.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>IEEE transactions on magnetics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Darragh, N.R.</au><au>Mapps, D.J.</au><au>Donnelly, T.</au><au>Wade, J.G.</au><au>Hoinville, J.R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Observation of underlayer domain noise in perpendicular recording disks</atitle><jtitle>IEEE transactions on magnetics</jtitle><stitle>TMAG</stitle><date>1993-11-01</date><risdate>1993</risdate><volume>29</volume><issue>6</issue><spage>3742</spage><epage>3744</epage><pages>3742-3744</pages><issn>0018-9464</issn><eissn>1941-0069</eissn><coden>IEMGAQ</coden><abstract>The authors employed a disk test system to extract samples of media noise from dual layer perpendicular recording disks. The samples of the media noise show it to have a distinct high and low frequency structure. The high frequency structure is the noise arising from the micromagnetics of the CoCr recording layer. The low frequency structure does not arise from the recording layer but from the NiFe underlayer. Using an imaging technique, the underlayer noise is characterized by lines that span inwards from the outside diameter of the disk. The appearance and behavior of these lines shows them to be attributable to domain walls in the underlayer of the disk.< ></abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/20.281288</doi><tpages>3</tpages></addata></record> |
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| ispartof | IEEE transactions on magnetics, 1993-11, Vol.29 (6), p.3742-3744 |
| issn | 0018-9464 1941-0069 |
| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Applied sciences Disk recording Electronics Exact sciences and technology Frequency Laser noise Magnetic and optical mass memories Magnetic heads Magnetic noise Magnetic recording Noise figure Noise reduction Oscilloscopes Perpendicular magnetic recording Storage and reproduction of information |
| title | Observation of underlayer domain noise in perpendicular recording disks |
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