JPS56153532A - Magnetic recording tape and its manufacture - Google Patents
Magnetic recording tape and its manufactureInfo
- Publication number
- JPS56153532A JPS56153532A JP5741380A JP5741380A JPS56153532A JP S56153532 A JPS56153532 A JP S56153532A JP 5741380 A JP5741380 A JP 5741380A JP 5741380 A JP5741380 A JP 5741380A JP S56153532 A JPS56153532 A JP S56153532A
- Authority
- JP
- Japan
- Prior art keywords
- thin plate
- tape
- ferromagnetic
- cold
- nonmagnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005291 magnetic effect Effects 0.000 title abstract 3
- 238000004519 manufacturing process Methods 0.000 title 1
- 230000005294 ferromagnetic effect Effects 0.000 abstract 4
- 239000000956 alloy Substances 0.000 abstract 3
- 229910045601 alloy Inorganic materials 0.000 abstract 3
- 229910052802 copper Inorganic materials 0.000 abstract 3
- 239000002184 metal Substances 0.000 abstract 3
- 229910052751 metal Inorganic materials 0.000 abstract 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 2
- 229910052739 hydrogen Inorganic materials 0.000 abstract 2
- 239000001257 hydrogen Substances 0.000 abstract 2
- 230000009466 transformation Effects 0.000 abstract 2
- 238000000137 annealing Methods 0.000 abstract 1
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 238000003801 milling Methods 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 238000003466 welding Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
- G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
- G11B5/676—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer
- G11B5/678—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer having three or more magnetic layers
Landscapes
- Manufacturing Of Magnetic Record Carriers (AREA)
- Hard Magnetic Materials (AREA)
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE:To increase the coercive force, by overlapping the nonmagnetic metal or nonmagnetic alloy thin plate and ferromagnetic thin plate including >=3 kinds of specified elements to form them into one body and then cold-milling and annelaing them and forming magnetic tape including the ferromagnetic phase causing Spinodal transformation. CONSTITUTION:The plate joined by overlapping the alloy thin plate including >=3 kinds of elements out of Fe, Ni, Co, Cu as ferromagnetic metal and the thin plate made of nonmagnetic metal (Cu, Cr) or nonmagnetic alloy (55wt% Ni-45wt% Cu and the like and by welding the circumference, is annealed at 1,000 deg.C in hydrogen atomosphere for 30min. Further, the thin plate of about 1mm. thickness is made with cold mill and it is subjected to solulizing treatment in hydrogen at about 1,000 deg.C to cool it repidly. Further, the plate is cold-milled into a tape of about 5mum thickness. The tape has the ferromagnetic layer causing Spinodal transformation by applying the magnetic field of >=500Oe and annealing it. Thus, the metallic tape excellent in the rectangular ratio and sensitivity and high in the high-region frequency output level can be obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5741380A JPS56153532A (en) | 1980-04-30 | 1980-04-30 | Magnetic recording tape and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5741380A JPS56153532A (en) | 1980-04-30 | 1980-04-30 | Magnetic recording tape and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56153532A true JPS56153532A (en) | 1981-11-27 |
Family
ID=13054954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5741380A Pending JPS56153532A (en) | 1980-04-30 | 1980-04-30 | Magnetic recording tape and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56153532A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1477968A1 (en) * | 2003-05-13 | 2004-11-17 | Fuji Photo Film Co., Ltd. | Magnetic recording medium and method of producing the same |
| US6994895B2 (en) | 2002-07-03 | 2006-02-07 | Fuji Photo Film Co., Ltd. | Magnetic recording medium including an annealed alloy particle layer and method of producing the same |
| US7244287B2 (en) | 2002-05-31 | 2007-07-17 | Fujifilm Corporation | Magnetic particle, its production method, magnetic recording medium and its production method |
| US7384449B2 (en) | 2001-09-05 | 2008-06-10 | Fujifilm Corporation | Ferromagnetic nanoparticles, material coated with dispersion of ferromagnetic nanoparticles, and magnetic recording medium using the material |
-
1980
- 1980-04-30 JP JP5741380A patent/JPS56153532A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7384449B2 (en) | 2001-09-05 | 2008-06-10 | Fujifilm Corporation | Ferromagnetic nanoparticles, material coated with dispersion of ferromagnetic nanoparticles, and magnetic recording medium using the material |
| US7244287B2 (en) | 2002-05-31 | 2007-07-17 | Fujifilm Corporation | Magnetic particle, its production method, magnetic recording medium and its production method |
| US6994895B2 (en) | 2002-07-03 | 2006-02-07 | Fuji Photo Film Co., Ltd. | Magnetic recording medium including an annealed alloy particle layer and method of producing the same |
| EP1477968A1 (en) * | 2003-05-13 | 2004-11-17 | Fuji Photo Film Co., Ltd. | Magnetic recording medium and method of producing the same |
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