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Article: A two-stage heating scheme for heat assisted magnetic recording

TitleA two-stage heating scheme for heat assisted magnetic recording
Authors
Issue Date2014
PublisherAIP Publishing LLC. The Journal's web site is located at http://jap.aip.org/jap/staff.jsp
Citation
Journal of Applied Physics, 2014, v. 115 n. 17, article no. 17B702 How to Cite?
AbstractHeat Assisted Magnetic Recording (HAMR) has been proposed to extend the storage areal density beyond 1 Tb/in.2for the next generation magnetic storage. A near field transducer (NFT) is widely used in HAMR systems to locally heat the magnetic disk during the writing process. However, much of the laser power is absorbed around the NFT, which causes overheating of the NFT and reduces its reliability. In this work, a two-stage heating scheme is proposed to reduce the thermal load by separating the NFT heating process into two individual heating stages from an optical waveguide and a NFT, respectively. As the first stage, the optical waveguide is placed in front of the NFT and delivers part of laser energy directly onto the disk surface to heat it up to a peak temperature somewhat lower than the Curie temperature of the magnetic material. Then, the NFT works as the second heating stage to heat a smaller area inside the waveguide heated area further to reach the Curie point. The energy applied to the NFT in the second heating stage is reduced compared with a typical single stage NFT heating system. With this reduced thermal load to the NFT by the two-stage heating scheme, the lifetime of the NFT can be extended orders longer under the cyclic load condition. © 2014 AIP Publishing LLC.
Persistent Identifierhttp://hdl.handle.net/10722/257184
ISSN
2020 Impact Factor: 2.546
2015 SCImago Journal Rankings: 0.603
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorXiong, Shaomin-
dc.contributor.authorKim, Jeongmin-
dc.contributor.authorWang, Yuan-
dc.contributor.authorZhang, Xiang-
dc.contributor.authorBogy, David-
dc.date.accessioned2018-07-24T08:59:04Z-
dc.date.available2018-07-24T08:59:04Z-
dc.date.issued2014-
dc.identifier.citationJournal of Applied Physics, 2014, v. 115 n. 17, article no. 17B702-
dc.identifier.issn0021-8979-
dc.identifier.urihttp://hdl.handle.net/10722/257184-
dc.description.abstractHeat Assisted Magnetic Recording (HAMR) has been proposed to extend the storage areal density beyond 1 Tb/in.2for the next generation magnetic storage. A near field transducer (NFT) is widely used in HAMR systems to locally heat the magnetic disk during the writing process. However, much of the laser power is absorbed around the NFT, which causes overheating of the NFT and reduces its reliability. In this work, a two-stage heating scheme is proposed to reduce the thermal load by separating the NFT heating process into two individual heating stages from an optical waveguide and a NFT, respectively. As the first stage, the optical waveguide is placed in front of the NFT and delivers part of laser energy directly onto the disk surface to heat it up to a peak temperature somewhat lower than the Curie temperature of the magnetic material. Then, the NFT works as the second heating stage to heat a smaller area inside the waveguide heated area further to reach the Curie point. The energy applied to the NFT in the second heating stage is reduced compared with a typical single stage NFT heating system. With this reduced thermal load to the NFT by the two-stage heating scheme, the lifetime of the NFT can be extended orders longer under the cyclic load condition. © 2014 AIP Publishing LLC.-
dc.languageeng-
dc.publisherAIP Publishing LLC. The Journal's web site is located at http://jap.aip.org/jap/staff.jsp-
dc.relation.ispartofJournal of Applied Physics-
dc.titleA two-stage heating scheme for heat assisted magnetic recording-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1063/1.4853275-
dc.identifier.scopuseid_2-s2.0-84893105094-
dc.identifier.volume115-
dc.identifier.issue17-
dc.identifier.spagearticle no. 17B702-
dc.identifier.epagearticle no. 17B702-
dc.identifier.isiWOS:000335643700231-
dc.identifier.issnl0021-8979-

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