Thin film magnetic recording media.

申请公布号：EP0145157(A1)

申请号：EP19840306852

申请日期：1984.10.08

申请公布日期：1985.06.19

申请人：

HEWLETT-PACKARD COMPANY

发明人：OPFER, JAMES E.;NATARAJAN, BANGALORE R.

分类号：G11B5/66;G11B5/64;G11B5/73;G11B5/738;(IPC1-7):G11B5/66

主分类号：G11B5/66

摘要：<p>A thin film magnetic recording disc is provided wherein a magnetic layer (8) is an alloy of cobalt and platinum disposed on a chromium layer (6). A barrier layer (10) of chromium is formed on the cobalt-platinum film and a wear layer (12) of an oxide of cobalt is provided on the barrier layer. The platinum content in the magnetic film is varied so as to provide a magnetic film with a desired coercivity which is significantly less dependent upon film thickness. This permits the cobalt-platinum film thickness to be adjusted to meet a wide range of recording system design parameters. The coercivity of the magnetic film may be deterined primarily by the amount of platinum in the alloy and the saturation magnetization-thickness product of the film is determined primarily by the film thickness.</p>

PROCESS FOR PREPARING NOVEL 7-/2,6-DIBROMO-4-METHYLPHENYL/-2,3-DIHYDRO-IMIDAZO /1,2-A/-IMIDAZOLES

METHOD OF PRODUCING THIN FILM TRANSISTOR WITH AUTOMATIC CENTERING GRID

METHOD OF MANUFACTURE OF DERIVATIVES OF N-BENZOYLPHENYLALANINE

SET OF PLASTIC MEMBERS FOR SECURING FACADE SHIELDING PANELS IN PARTICULAR TO BRICKWORK WALLS

METHOD OF OBTAINING A ZEOLITE CATALYST

METHOD OF OBTAINING NON-DRYING SEALING PUTTY BEING RESISTANT BOTH TO LOW AND ELEVATED TEMPERATURES

METHOD OF LONGITUDINALY SPLITTING ROLLED PRODUCTS IN TWOOR PLURALITY OF STRANDS WHILE ROLLING THEM IN HOT ROLLING MILLS

FURNACE FOR OXIDINGLY BURNIG SMALL AGGLOMERATES

METHOD OF CONTROLLING FLOW OF COMBUSTION AIR TO A DOUBLE-SHAFT REVERSION FURNACE AND SYSTEM FOR SUPPLYING COMBUSTION AIR AND AIR FOR COLLING ALREADY FIRED MATERIALIN SUCH FURNACE

COPPER ALLOY

METHOD OF OBTAINING A RAW PULVERIZED DETERGENT OF HIGH ANIONIC SURFACTANTS CONTENT

SEWING MACHINE

POLYFUNCTIONAL ADDITIVE TO FUEL OILS

METHOD OF OBTAINING CERAMIC SILICATE MATERIAL

METHOD OF THERMALY TREATING A MIXTURE OF POWER COALS AND PETROLEUM DISTILLATION RESIDUES

MOLTEM METAL REFINING APPARATUS

PROTON MAGNETOMETER DETECTOR

ELECTRIC PUSH-BOTTON SWITCH FOR CONTROLLING A MOTOR

DEVICE FOR SHARPENING CUTTING TOOLS IN PARTICULAR THOSE INTENDED FOR MACHINING THREADS

METHOD OF PRODUCING COMPOUND YARN OF CONTINUOUS CHEMICAL FIBRES