SPIN VALVE TYPE MAGNETIC HEAD AND ITS MANUFACTURING METHOD
PROBLEM TO BE SOLVED: To provide a spin valve type magnetic head wherein no characteristic changes occur in an operation temperature range. SOLUTION: An antiferromagnetic layer of a fixed layer of a spin valve is made of an alloy which contains Cr, Mn, Pt, a magnetic field enough to magnetically sat...
Gespeichert in:
| Hauptverfasser: | , , , , |
|---|---|
| Format: | Patent |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | |
|---|---|
| container_issue | |
| container_start_page | |
| container_title | |
| container_volume | |
| creator | IMAGAWA TAKAO SHIGEMATSU KEISHI KAMIO HIROSHI NARUSHIGE SHINJI NISHIOKA KOICHI |
| description | PROBLEM TO BE SOLVED: To provide a spin valve type magnetic head wherein no characteristic changes occur in an operation temperature range. SOLUTION: An antiferromagnetic layer of a fixed layer of a spin valve is made of an alloy which contains Cr, Mn, Pt, a magnetic field enough to magnetically saturate the fixed layer in a magnetic gap depth direction at a temperature lower than the blocking temperature (Tb) of the antiferromagnetic layer is kept to be applied, and after the fixed layer is cooled in the magnetic field, at a temperature lower than Tb, a minimum magnetic field enough to saturate the magnetization of the free layer of the spin valve in a track width direction is kept to be applied in the same direction. A coupling magnetic field He of one-direction anisotropy of the fixed layer is set to He(Tmax)≥60+100/ hMR[Oe] where an antiferromagnetic layer composition is (Cr100-xMnx)100-yPty, 2≤y, 40≤x≤70, columnar crystal powders are formed, an average crystal particle size of the antiferromagnetic layer is set to 2.7×10-18cm3, (110) of bct is set parallel to a film surface, a long axis is set within the film surface, and magnetization is fixed in a desired direction up to the fixed layer component having Tb higher than Tmax. COPYRIGHT: (C)2003,JPO |
| format | Patent |
| fullrecord | <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_JP2003178406A</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>JP2003178406A</sourcerecordid><originalsourceid>FETCH-epo_espacenet_JP2003178406A3</originalsourceid><addsrcrecordid>eNrjZLAKDvD0Uwhz9AlzVQiJDHBV8HV093MN8XRW8HB1dFFw9HNR8AwJBor6hbo5OoeEBnn6uSv4uoZ4-LvwMLCmJeYUp_JCaW4GJTfXEGcP3dSC_PjU4oLE5NS81JJ4rwAjAwNjQ3MLEwMzR2OiFAEA6r4pPw</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>SPIN VALVE TYPE MAGNETIC HEAD AND ITS MANUFACTURING METHOD</title><source>esp@cenet</source><creator>IMAGAWA TAKAO ; SHIGEMATSU KEISHI ; KAMIO HIROSHI ; NARUSHIGE SHINJI ; NISHIOKA KOICHI</creator><creatorcontrib>IMAGAWA TAKAO ; SHIGEMATSU KEISHI ; KAMIO HIROSHI ; NARUSHIGE SHINJI ; NISHIOKA KOICHI</creatorcontrib><description>PROBLEM TO BE SOLVED: To provide a spin valve type magnetic head wherein no characteristic changes occur in an operation temperature range. SOLUTION: An antiferromagnetic layer of a fixed layer of a spin valve is made of an alloy which contains Cr, Mn, Pt, a magnetic field enough to magnetically saturate the fixed layer in a magnetic gap depth direction at a temperature lower than the blocking temperature (Tb) of the antiferromagnetic layer is kept to be applied, and after the fixed layer is cooled in the magnetic field, at a temperature lower than Tb, a minimum magnetic field enough to saturate the magnetization of the free layer of the spin valve in a track width direction is kept to be applied in the same direction. A coupling magnetic field He of one-direction anisotropy of the fixed layer is set to He(Tmax)≥60+100/ hMR[Oe] where an antiferromagnetic layer composition is (Cr100-xMnx)100-yPty, 2≤y, 40≤x≤70, columnar crystal powders are formed, an average crystal particle size of the antiferromagnetic layer is set to 2.7×10-18cm3, (110) of bct is set parallel to a film surface, a long axis is set within the film surface, and magnetization is fixed in a desired direction up to the fixed layer component having Tb higher than Tmax. COPYRIGHT: (C)2003,JPO</description><edition>7</edition><language>eng</language><subject>INFORMATION STORAGE ; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER ; PHYSICS</subject><creationdate>2003</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20030627&DB=EPODOC&CC=JP&NR=2003178406A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20030627&DB=EPODOC&CC=JP&NR=2003178406A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>IMAGAWA TAKAO</creatorcontrib><creatorcontrib>SHIGEMATSU KEISHI</creatorcontrib><creatorcontrib>KAMIO HIROSHI</creatorcontrib><creatorcontrib>NARUSHIGE SHINJI</creatorcontrib><creatorcontrib>NISHIOKA KOICHI</creatorcontrib><title>SPIN VALVE TYPE MAGNETIC HEAD AND ITS MANUFACTURING METHOD</title><description>PROBLEM TO BE SOLVED: To provide a spin valve type magnetic head wherein no characteristic changes occur in an operation temperature range. SOLUTION: An antiferromagnetic layer of a fixed layer of a spin valve is made of an alloy which contains Cr, Mn, Pt, a magnetic field enough to magnetically saturate the fixed layer in a magnetic gap depth direction at a temperature lower than the blocking temperature (Tb) of the antiferromagnetic layer is kept to be applied, and after the fixed layer is cooled in the magnetic field, at a temperature lower than Tb, a minimum magnetic field enough to saturate the magnetization of the free layer of the spin valve in a track width direction is kept to be applied in the same direction. A coupling magnetic field He of one-direction anisotropy of the fixed layer is set to He(Tmax)≥60+100/ hMR[Oe] where an antiferromagnetic layer composition is (Cr100-xMnx)100-yPty, 2≤y, 40≤x≤70, columnar crystal powders are formed, an average crystal particle size of the antiferromagnetic layer is set to 2.7×10-18cm3, (110) of bct is set parallel to a film surface, a long axis is set within the film surface, and magnetization is fixed in a desired direction up to the fixed layer component having Tb higher than Tmax. COPYRIGHT: (C)2003,JPO</description><subject>INFORMATION STORAGE</subject><subject>INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER</subject><subject>PHYSICS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2003</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLAKDvD0Uwhz9AlzVQiJDHBV8HV093MN8XRW8HB1dFFw9HNR8AwJBor6hbo5OoeEBnn6uSv4uoZ4-LvwMLCmJeYUp_JCaW4GJTfXEGcP3dSC_PjU4oLE5NS81JJ4rwAjAwNjQ3MLEwMzR2OiFAEA6r4pPw</recordid><startdate>20030627</startdate><enddate>20030627</enddate><creator>IMAGAWA TAKAO</creator><creator>SHIGEMATSU KEISHI</creator><creator>KAMIO HIROSHI</creator><creator>NARUSHIGE SHINJI</creator><creator>NISHIOKA KOICHI</creator><scope>EVB</scope></search><sort><creationdate>20030627</creationdate><title>SPIN VALVE TYPE MAGNETIC HEAD AND ITS MANUFACTURING METHOD</title><author>IMAGAWA TAKAO ; SHIGEMATSU KEISHI ; KAMIO HIROSHI ; NARUSHIGE SHINJI ; NISHIOKA KOICHI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JP2003178406A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2003</creationdate><topic>INFORMATION STORAGE</topic><topic>INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER</topic><topic>PHYSICS</topic><toplevel>online_resources</toplevel><creatorcontrib>IMAGAWA TAKAO</creatorcontrib><creatorcontrib>SHIGEMATSU KEISHI</creatorcontrib><creatorcontrib>KAMIO HIROSHI</creatorcontrib><creatorcontrib>NARUSHIGE SHINJI</creatorcontrib><creatorcontrib>NISHIOKA KOICHI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>IMAGAWA TAKAO</au><au>SHIGEMATSU KEISHI</au><au>KAMIO HIROSHI</au><au>NARUSHIGE SHINJI</au><au>NISHIOKA KOICHI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>SPIN VALVE TYPE MAGNETIC HEAD AND ITS MANUFACTURING METHOD</title><date>2003-06-27</date><risdate>2003</risdate><abstract>PROBLEM TO BE SOLVED: To provide a spin valve type magnetic head wherein no characteristic changes occur in an operation temperature range. SOLUTION: An antiferromagnetic layer of a fixed layer of a spin valve is made of an alloy which contains Cr, Mn, Pt, a magnetic field enough to magnetically saturate the fixed layer in a magnetic gap depth direction at a temperature lower than the blocking temperature (Tb) of the antiferromagnetic layer is kept to be applied, and after the fixed layer is cooled in the magnetic field, at a temperature lower than Tb, a minimum magnetic field enough to saturate the magnetization of the free layer of the spin valve in a track width direction is kept to be applied in the same direction. A coupling magnetic field He of one-direction anisotropy of the fixed layer is set to He(Tmax)≥60+100/ hMR[Oe] where an antiferromagnetic layer composition is (Cr100-xMnx)100-yPty, 2≤y, 40≤x≤70, columnar crystal powders are formed, an average crystal particle size of the antiferromagnetic layer is set to 2.7×10-18cm3, (110) of bct is set parallel to a film surface, a long axis is set within the film surface, and magnetization is fixed in a desired direction up to the fixed layer component having Tb higher than Tmax. COPYRIGHT: (C)2003,JPO</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext_linktorsrc |
| identifier | |
| ispartof | |
| issn | |
| language | eng |
| recordid | cdi_epo_espacenet_JP2003178406A |
| source | esp@cenet |
| subjects | INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS |
| title | SPIN VALVE TYPE MAGNETIC HEAD AND ITS MANUFACTURING METHOD |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-28T05%3A34%3A20IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-epo_EVB&rft_val_fmt=info:ofi/fmt:kev:mtx:patent&rft.genre=patent&rft.au=IMAGAWA%20TAKAO&rft.date=2003-06-27&rft_id=info:doi/&rft_dat=%3Cepo_EVB%3EJP2003178406A%3C/epo_EVB%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |