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MAGNETIC RECORDING MEDIUM USING FERROMAGNETIC-PARAMAGNETIC PHASE TRANSITION IN FePt ALLOY

外国特許コード F140007826
整理番号 S2012-0381-N0
掲載日 2014年1月29日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2013JP064634
国際公開番号 WO 2013187217
国際出願日 平成25年5月27日(2013.5.27)
国際公開日 平成25年12月19日(2013.12.19)
優先権データ
  • 特願2012-135220 (2012.6.14) JP
発明の名称 (英語) MAGNETIC RECORDING MEDIUM USING FERROMAGNETIC-PARAMAGNETIC PHASE TRANSITION IN FePt ALLOY
発明の概要(英語) A magnetic recording medium equipped with a magnetic recording layer, said magnetic recording layer comprising ferromagnetic parts and paramagnetic parts that are aligned in accordance with a definite rule, wherein: the ferromagnetic parts contain a ferromagnetic alloy having a saturation magnetization of 0.37-1.38 [Wb/m2] inclusive; said paramagnetic parts contain a paramagnetic alloy having a saturation magnetization of 0-0.88 [Wb/m2] inclusive; the alloy contained in the ferromagnetic parts and the alloy contained in the paramagnetic parts have almost the same composition, said composition being represented by formula (1) or formula (2); and the alloy contained in the ferromagnetic parts has an L10 ordered structure, while the alloy contained in the paramagnetic parts has an A1 disordered structure. Thus, a magnetic recording medium that can be easily manufactured and has an increased recording density can be provided. (Fe1-xM1x)Pt (1) wherein M1 stands for Mn or Nb. Fe(Pt1-yM2y) (2) wherein M2 stands for Ru, Rh, Os or Ir.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • AKITA UNIVERSITY
  • 発明者(英語)
  • HASEGAWA TAKASHI
  • ISHIO SHUNJI
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IS JP KE KG KN KP KR KZ LA LC LK LR LS LT LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN TD TG
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