JP2011216162A - 垂直磁気ディスク - Google Patents
垂直磁気ディスク Download PDFInfo
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- JP2011216162A JP2011216162A JP2010083980A JP2010083980A JP2011216162A JP 2011216162 A JP2011216162 A JP 2011216162A JP 2010083980 A JP2010083980 A JP 2010083980A JP 2010083980 A JP2010083980 A JP 2010083980A JP 2011216162 A JP2011216162 A JP 2011216162A
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/7368—Non-polymeric layer under the lowermost magnetic recording layer
- G11B5/7369—Two or more non-magnetic underlayers, e.g. seed layers or barrier layers
- G11B5/737—Physical structure of underlayer, e.g. texture
Abstract
【解決手段】本発明に係る垂直磁気ディスクの代表的な構成は、基板上に、グラニュラ磁性層160と、該グラニュラ磁性層160より上方に配置された補助記録層180とを備え、グラニュラ磁性層160は柱状に成長したCoCrPt合金を主成分とする磁性粒子の周囲に酸化物を主成分とする非磁性物質が偏析して粒界部が形成されたグラニュラ構造を有し、補助記録層180はCoCrPtRu合金を主成分とし、膜厚が1.5nm〜4.0nmであることを特徴とする。
【選択図】図1
Description
図1は、第1実施形態にかかる垂直磁気ディスク100の構成を説明する図である。図1に示す垂直磁気ディスク100は、基板110、付着層120、軟磁性層130、非晶質合金層138、前下地層140(第1前下地層142および第2前下地層144を含む)、下地層150、グラニュラ磁性層160、分断層170、補助記録層180、保護層190、潤滑層200で構成されている。
上記構成の垂直磁気ディスク100の有効性を確かめるために、以下の実施例と比較例を用いて説明する。
Claims (3)
- 基板上に、非晶質合金層と、非晶質合金層の上に設けられる前下地層と、前下地層の上に設けられたhcp結晶構造のRuまたはRu系合金からなる下地層と、前記下地層の上に設けられたグラニュラ磁性層とを備え、
前記非晶質合金層はTaを含み、
前記前下地層は、微結晶のTiまたはTi合金からなる第1前下地層と、fcc結晶構造のNi系合金からなる第2前下地層とを含むことを特徴とする垂直磁気ディスク。 - 前記非晶質合金層は、Taを30at%以上含むことを特徴とする請求項1に記載の垂直磁気ディスク。
- 前記第1前下地層の膜厚は1nm以上5nm以下であることを特徴とする請求項1に記載の垂直磁気ディスク。
Priority Applications (2)
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JP2010083980A JP5646199B2 (ja) | 2010-03-31 | 2010-03-31 | 垂直磁気ディスク |
US13/048,139 US8865327B2 (en) | 2010-03-31 | 2011-03-15 | Perpendicular magnetic disc |
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JP2010083980A JP5646199B2 (ja) | 2010-03-31 | 2010-03-31 | 垂直磁気ディスク |
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JP2011216162A true JP2011216162A (ja) | 2011-10-27 |
JP5646199B2 JP5646199B2 (ja) | 2014-12-24 |
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JP2010083980A Expired - Fee Related JP5646199B2 (ja) | 2010-03-31 | 2010-03-31 | 垂直磁気ディスク |
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US (1) | US8865327B2 (ja) |
JP (1) | JP5646199B2 (ja) |
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US20120070692A1 (en) | 2012-03-22 |
US8865327B2 (en) | 2014-10-21 |
JP5646199B2 (ja) | 2014-12-24 |
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