摘要:
The coefficient k.sub.1 of linear expansion in a temperature range from 50.degree. to 300.degree. C. of a non-magnetic support member of a recording medium, before a Co-Cr alloy film is formed thereon, is less than 0 mm/mm .degree.C., and the coefficient k.sub.2 of linear expansion in a temperature range from 50.degree. to 300.degree. C. of that support member after the Co-Cr alloy film is formed is less than 0.3.times.10.sup.-5 mm/mm .degree.C. The alloy film also includes carbon in the magnetic layer, and a protective film comprised of carbon is further formed on the magnetic layer. The recording medium is particularly adapted for perpendicular magnetic recording.
摘要翻译:在其上形成Co-Cr合金膜之前,在记录介质的非磁性支撑构件的50℃至300℃的温度范围内的线性膨胀系数k1小于0mm / mm 2 在形成Co-Cr合金膜之后,该支撑构件在50〜300℃的温度范围内的线膨胀系数k2小于0.3×10 -5 mm / mm 3。合金膜 还包括磁性层中的碳,并且在磁性层上进一步形成由碳构成的保护膜。 记录介质特别适用于垂直磁记录。
摘要:
A method of manufacturing a data recording medium for recording and reproducing data by use of a magnetic field or light and formed of an ordered alloy thin film comprising the steps of forming at least one underlayer principally containing an element or a compound selected from the group consisting of Cr, Pt, Pd, Au, Fe, Ni, MgO, NiO and controlled in such a way that a crystal plane having a crystal lattice face of a Miller index (100) is in parallel to a substrate, and forming an ordered alloy layer with L1.sub.0 crystal structure by sputter deposition within the range satisfying Equation 1: P.times.D>3000, where P is Ar sputter-gas pressure (Pa) and D is a target-substrate distance (mm), is disclosed. When a recording medium is formed of an ordered alloy thin film by using a glass substrate for a hard disk for industrial use, according to the method of the present invention, formation of an ordered phase required for exhibiting large magnetocrystalline anisotropy is accelerated at a low temperature allowing usage of the glass substrate, so that the recording medium is improved in thermal stability.
摘要:
An information recording layer consisting of a composite of an ordered alloy of L10 crystal structure selected from a group A, and MgO is used for a perpendicular magnetic recording medium. The group A includes an FePt ordered alloy, a CoPt ordered alloy, an FePd ordered alloy and an alloy thereof. This information recording layer has a very small magnetic domain structure and allows high density recording as seen from a signal output spectrum showing a result of a recording and reproducing evaluation of a magnetic recording medium in one example. The information recording layer can be formed at lower film formation temperature than a temperature of a composite thin film of an ordered alloy of L10 crystal structure according to a conventional technique.
摘要:
A vehicle navigation system and method in the present invention comprises a navigation apparatus transmitting a current position of a vehicle and a target destination of the vehicle, and a base station receiving the current position and the target destination, searching a route information from the current position to the target destination, and transmitting the route information to the navigation apparatus. The base station includes an information storage section storing added information with regard to road features, a route searching section searching the added route information from the information storage section, a transmitting section transmitting the route information to the navigation apparatus and then transmitting the added information to the navigation apparatus. The navigation apparatus displays the route information and the added route information each of which is transmitted from the base station.
摘要:
In a vacuum evaporation method for depositing a thin film on a substrate by heating a sublimable source material under vacuum to vaporize it, the source material is subjectd to vaporization in an unsintered state. Electron-beam heating may be employed. The primary advantage of avoiding precedent sintering of the source material is great reduction in scattering of fine particles of the source material in the vacuum chamber. Consequently the deposited film has an even and smooth surface. A representative of the sublimable source material is a II-VI compound semiconductor such as ZnS used as the host material of an electroluminescent phosphor. Thin-film electroluminsecent devices produced by using the vacuum evaporation method according to the invention possess improved reliability.
摘要:
A magnetic recording medium has a recording layer formed of a magnetic material represented by the following general formula: [(Co1-mPtm)1-nCrn]100-x-yTixOy, where m and n are atomic ratios, m is 0.2 or more and 0.4 or less, n is 0 or more and 0.1 or less, x is 9 at. % or more and 13 at. % or less, and y/x is 1.8 or more and 2.3 or less.
摘要:
To present an information recording medium for achieving high density information recording, in particular, a high signal output and a high resolution in magnetic recording, for example, an information recording medium sequentially forming a layer made of soft magnetic material, a layer made of nonmagnetic material, and an information recording layer of ordered alloy with L10 crystal structure selected from group A is manufactured in a specified manufacturing method. Herein the group A is defined to include FePt ordered alloy, CoPt ordered alloy, FePd ordered alloy, and their alloy.
摘要:
A thin film magnetic recording medium comprising, a substrate, a crystal orientation enhancement underlayer of hcp structure formed on the substrate, a perpendicular orientation dispersion angle of c-axis thereof being not more than 10 degrees, and a cobalt-chromium-based magnetic layer formed on the underlayer, the magnetic layer having a thickness of 100 nm or less and containing 1 to 8 at % of niobium.
摘要:
A method of designing a patterned magnetic recording medium including a magnetic film with perpendicular magnetic anisotropy which is patterned into dots form includes steps of setting values to dot pattern periods Px and Py, a thickness “t”, a thermal stability factor Kn, a minimum inter-dot spacing S0, and a maximum recording field Hm, setting an initial value of a saturation magnetization Ms, finding a nucleation field for magnetization reversal Hn and estimating a coercivity Hc and a saturation field Hs, and repeating the steps given above so as to make the saturation field Hs lower than the maximum recording field Hm, thereby determining the magnetic properties Ms, Hn and Hc satisfying a desired condition.
摘要翻译:设计图案化磁记录介质的方法,其包括具有垂直磁各向异性的磁膜,其被图案化为点形,包括将值设置为点图案周期P&lt; x&gt;和P&gt; Y >,厚度“t”,热稳定性因子K N n N,最小间隙间隔S 0> 0,最大记录场H“ SUB>,设置饱和磁化强度M S s的初始值,找到用于磁化反转H n n N的成核磁场,并估计矫顽磁力H < 和饱和场H S S,并且重复上述步骤以使得比最大记录场H SUB的饱和场H S SUB >,从而确定满足期望条件的磁性质M H,H N n和H C c。
摘要:
A method of designing a patterned magnetic recording medium including a magnetic film with perpendicular magnetic anisotropy which is patterned into dots form includes steps of setting values to dot pattern periods Px and Py, a thickness “t”, a thermal stability factor Kn, a minimum inter-dot spacing S0, and a maximum recording field Hm, setting an initial value of a saturation magnetization Ms, finding a nucleation field for magnetization reversal Hn and estimating a coercivity Hc and a saturation field Hs, and repeating the steps given above so as to make the saturation field Hs lower than the maximum recording field Hm, thereby determining the magnetic properties is Ms. Hn and Hc satisfying a desired condition.
摘要翻译:设计图案化磁记录介质的方法,其包括具有垂直磁各向异性的磁膜,其被图案化为点形,包括将值设置为点图案周期P&lt; x&gt;和P&gt; Y >,厚度“t”,热稳定性因子K N n N,最小间隙间隔S 0> 0,最大记录场H“ SUB>,设置饱和磁化强度M S s的初始值,找到用于磁化反转H n n N的成核磁场,并估计矫顽磁力H < 和饱和场H S S,并且重复上述步骤以使得比最大记录场H SUB的饱和场H S SUB >,从而确定磁特性为M S。 H&lt; N&gt;和H&lt; c&gt;满足期望条件。