HEAT-ASSISTED MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING DEVICE

HEAT-ASSISTED MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING DEVICE

To provide a heat-assisted magnetic recording medium which is excellent in an electromagnetic conversion characteristic.SOLUTION: A heat-assisted magnetic recording medium 100 has a baseboard, an underlayer 2, and a (001)-oriented magnetic layer 3. In the magnetic layer 3, a first magnetic layer 31...

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Bibliographische Detailangaben
Hauptverfasser: YAMAGUCHI TAKEHIRO, SHIGE TOMOO, ZHANG LEI, KANBE TETSUYA, FUKUSHIMA TAKAYUKI, XU CHEN, SHIBATA HISATO, NIWA KAZUYA
Format: Patent
Sprache:eng ; jpn
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRICITY
INDUCTANCES
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
MAGNETS
PHYSICS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
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Beschreibung
Zusammenfassung:To provide a heat-assisted magnetic recording medium which is excellent in an electromagnetic conversion characteristic.SOLUTION: A heat-assisted magnetic recording medium 100 has a baseboard, an underlayer 2, and a (001)-oriented magnetic layer 3. In the magnetic layer 3, a first magnetic layer 31 and a second magnetic layer 32 are laminated in this order. The first magnetic layer 31 and the second magnetic layer 32 include alloys having L1structures. The second magnetic layer 32 includes a ferrite at a grain boundary part of a magnetic particle. One kind or more of the ferrite are selected from a group consisting of NiFeO, MgFeO, MnFeO, CuFeO, ZnFeO, CoFeO, BaFeO, SrFeOand FeO. A Curie temperature of the magnetic particle is lower than a Curie temperature of the ferrite.SELECTED DRAWING: Figure 1 【課題】電磁変換特性に優れた熱アシスト磁気記録媒体を提供する。【解決手段】熱アシスト磁気記録媒体１００は、基板と、下地層２と、（００１）配向している磁性層３を有する。磁性層３は、第１の磁性層３１および第２の磁性層３２がこの順で積層されている。第１の磁性層３１および第２の磁性層３２は、Ｌ１０構造を有する合金を含む。第２の磁性層３２は、磁性粒子の粒界部に、フェライトを含む。フェライトは、ＮｉＦｅ２Ｏ４、ＭｇＦｅ２Ｏ４、ＭｎＦｅ２Ｏ４、ＣｕＦｅ２Ｏ４、ＺｎＦｅ２Ｏ３、ＣｏＦｅ２Ｏ４、ＢａＦｅ２Ｏ４、ＳｒＦｅ２Ｏ４およびＦｅ３Ｏ４からなる群より選択される１種以上である。磁性粒子のキュリー温度は、フェライトのキュリー温度よりも低い。【選択図】図１