公开(公告)号：US3607390A

公开(公告)日：1971-09-21

申请号：US3607390D

申请日：1969-09-29

Applicant: IBM

Inventor： COMSTOCK RICHARD L ,  NEPELA DANIEL A

IPC: C30B29/28 ,  H01F10/24 ,  H01F41/14 ,  H01F41/18 ,  H01F10/02

CPC classification number: H01F10/24 ,  Y10S117/902 ,  Y10S117/906

Abstract: A process for preparing single crystal ferrimagnetic films having square hysteresis loops, a regulated coercivity, and a compensation temperature above 250* K. A film of gadolinium iron garnet wherein a carefully selected amount of terbium or dysprosium replaces part of the gadolinium is deposited on a tytrium or rare earth aluminum garnet substrate having (111) or (100) orientation and heated until crystallization occurs.

公开(公告)号：US3427949A

公开(公告)日：1969-02-18

申请号：US3427949D

申请日：1966-04-07

Applicant: IBM

Inventor： KNIGHT ROBERT D ,  NEPELA DANIEL A

IPC: G03D3/02 ,  G03D5/04 ,  G03D13/04

CPC classification number: G03D5/04 ,  G03D3/02 ,  G03D13/04

公开(公告)号：US3887945A

公开(公告)日：1975-06-03

申请号：US42424273

申请日：1973-12-12

Applicant: IBM

Inventor： NEPELA DANIEL A ,  POTTER ROBERT I

IPC: G11B5/31 ,  G11B5/127 ,  G11B5/37 ,  G11B5/39 ,  G11B19/02 ,  G11B5/30 ,  G11B5/12

CPC classification number: G11B5/3967 ,  G11B19/02

Abstract: A head assembly for recording and reading data includes a pair of conductive films having a thin magnetoresistive (MR) element therebetween to achieve reading of magnetically recorded data; and having a pair of outer highly permeable members to accomplish writing of data on a magnetic medium. Control currents are applied to the conductors during each mode to provide the necessary bias for either inductive or magnetoresistive operation exclusively.

Abstract translation: 用于记录和读取数据的头组件包括一对导电膜，其间具有薄磁阻（MR）元件，以实现磁记录数据的读取; 并且具有一对外部高度可渗透的构件以完成在磁性介质上的数据写入。 在每个模式下，控制电流被施加到导体，以便为电感或磁阻操作提供必要的偏置。

公开(公告)号：US3573099A

公开(公告)日：1971-03-30

申请号：US3573099D

申请日：1969-12-22

Applicant: IBM

Inventor： MOORE EUGENE B ,  NEPELA DANIEL A

IPC: C01G49/00 ,  C03C17/23 ,  C30B7/00 ,  C30B29/28 ,  G11B5/02 ,  G11C13/06 ,  H01F10/24 ,  H01F41/22 ,  H01F41/28 ,  C04B35/16 ,  C04B35/50

CPC classification number: H01F41/28 ,  C30B7/005 ,  H01F10/24 ,  Y10T428/265

Abstract: CRACK FREE GARNET FILMS ARE DEPOSITED ON A GLASS SUBSTRATE. THE GLASS SUBSTRATE MUST HAVE A LOW LEAD CONTENT AND A THERMAL EXPANSION COEFFICIENT WITHIN THE RANGE 85X10**7 TO 105X10**7 AND AN ANNEALING TEMPERATURE OF ABOVE 750*C. GD3FE5O12 IS DEPOSITED IN A PLURALITY OF LAYERS, THE FIRST ONE OF WHICH IS LESS THAN 0.25 MICRON THICK. THE FIRST LAYER IS HEATED TO COMPLETE CRYSTALLIZATION PRIOR TO DEPOSITING ANY ADDITIONAL LAYER. THERE IS A FINAL HEATING TO COMPLETE CRYSTALLIZATION AFTER THE LAST DEPOSITION.

公开(公告)号：CA886514A

公开(公告)日：1971-11-23

申请号：CA886514D

Applicant: IBM

Inventor： NEPELA DANIEL A ,  EVLETH EARL M

公开(公告)号：FR2371755A1

公开(公告)日：1978-06-16

申请号：FR7727692

申请日：1977-09-09

Applicant: IBM

Inventor： NEPELA DANIEL A ,  RICE DONALD W ,  SUITS JAMES C

IPC: C22C5/04 ,  C22C19/03 ,  C22C30/00 ,  C22C38/00 ,  C22C38/08 ,  G11B5/31 ,  H01F1/147 ,  H01F10/14 ,  H01F1/04 ,  C22C5/00 ,  G11B5/42 ,  G11C11/14 ,  H01F10/00

公开(公告)号：CA1033836A

公开(公告)日：1978-06-27

申请号：CA209550

申请日：1974-09-19

Applicant: IBM

Inventor： BEAULIEU THOMAS J ,  NEPELA DANIEL A

IPC: G01D5/18 ,  G01R33/09 ,  G11B5/39

Abstract: A magnetoresistive (MR) read transducer has one MR element and a soft magnetic bias film that is electrically insulated from the MR element. When current is applied to the MR element, the bias film is magnetically saturated, and provides a magnetizing bias field to the MR element. The bias field is independent of the sense current amplitude and of the output signal.

公开(公告)号：CA943439A

公开(公告)日：1974-03-12

申请号：CA92736

申请日：1970-09-10

Applicant: IBM

Inventor： COMSTOCK RICHARD L ,  NEPELA DANIEL A

IPC: C30B29/28 ,  H01F10/24 ,  H01F41/14 ,  H01F41/18

公开(公告)号：CA1122399A

公开(公告)日：1982-04-27

申请号：CA336241

申请日：1979-09-24

Applicant: IBM

Inventor： MICHAELSEN JOHN D ,  NEPELA DANIEL A ,  PHIPPS PETER B P

IPC: G11B5/66 ,  C22C19/07 ,  C22C38/00 ,  G11B5/64 ,  G11B5/84 ,  H01F10/14 ,  H01F10/16 ,  H01F41/18 ,  H01F41/20

Abstract: CORROSION RESISTANT MAGNETIC RECORDING MEDIA A thin film magnetic recording medium for deposition on a record carrier includes a ferromagnetic alloy containing iron, cobalt and chromium. The ferromagnetic alloy consists of from 0-55% cobalt, from 8-22% of chromium with the remainder iron. The preferred range of chromium is from 10-18%. The magnetic recording layer is vacuum deposited over an extended portion of a record carrier for storing information which is represented by the spatial distribution of magnetic transitions in the magnetic layer. The iron-cobalt-chromium or iron-chromium composition according to this invention, gives the best magnetic properties consistent with excellent corrosion resistance. SA976033

公开(公告)号：CA1094360A

公开(公告)日：1981-01-27

申请号：CA287503

申请日：1977-09-26

Applicant: IBM

Inventor： NEPELA DANIEL A ,  RICE DONALD W ,  SUITS JAMES C

IPC: C22C5/04 ,  C22C19/03 ,  C22C30/00 ,  C22C38/00 ,  C22C38/08 ,  G11B5/31 ,  H01F1/147 ,  H01F10/14 ,  C23C15/00

Abstract: PALLADIUM ALLOYS Ferromagnetic alloys containing palladium suitable for use in magnetic devices and having improved resistance to corrosion contain from about 20 to 65 atomic percent palladium, up to 80 atomic percent iron and 0 to 55 atomic percent nickel. Magnetic films made of these alloys which contain 20 to 65 atomic percent palladium exhibit a magnetization, 4.pi.M, and a corrosion resistance equal to or better than Permalloy.