Designing the Composition of Amorphous Free Layer of a Magnetic Tunnel Junction
The magnetic and thermal properties of Co 70.5 Fe 4.5 Si1 5 B 10 and Ni 16 Fe 62 Si 8 B 14 quaternary amorphous alloys (metallic glasses) used for a free layer in the magnetic tunnel junctions (MTJs) were studied to correlate magnetic and glass characterization of amorphous alloys and the performanc...
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| Veröffentlicht in: | IEEE transactions on magnetics 2009-06, Vol.45 (6), p.2413-2416 |
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| description | The magnetic and thermal properties of Co 70.5 Fe 4.5 Si1 5 B 10 and Ni 16 Fe 62 Si 8 B 14 quaternary amorphous alloys (metallic glasses) used for a free layer in the magnetic tunnel junctions (MTJs) were studied to correlate magnetic and glass characterization of amorphous alloys and the performance of the MTJs with amorphous free layer. The characteristics of these amorphous free layers were compared with crystalline free layers composed of Co 90 Fe 10 and Ni 20 Fe 80 and other ternary amorphous alloys composed of Co 60 Fe 20 B 20 , and Co 24 Fe 56 B 20 . Results based on X-ray diffraction, vibrating sample magnetometer (VSM), and differential scanning calorimetry (DSC) were presented. The amorphous alloys exhibit the soft magnetic properties of low saturated magnetization (M s ) and low coercivity (H c ) in hyeteresis loops. The thermal properties were represented by the values of glass transition temperature (T g ), curie temperature (T c ), crystallization temperature (T x ), melting temperature (T m ), T rg (defined as T g /T m ), and DeltaT x (defined as T x -T g ). Compared with the other alloys, the amorphous Co 70.5 Fe 4.5 Si 15 B 10 alloy exhibits low M s , and low saturated field (H s ). This alloy also shows estimated high T g , large DeltaT x , and high T rg . Correlations between magnetic and glass characterization of amorphous free layer and the properties of MTJs composed of amorphous free layer were discussed. |
| doi_str_mv | 10.1109/TMAG.2009.2018593 |
| format | Article |
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The characteristics of these amorphous free layers were compared with crystalline free layers composed of Co 90 Fe 10 and Ni 20 Fe 80 and other ternary amorphous alloys composed of Co 60 Fe 20 B 20 , and Co 24 Fe 56 B 20 . Results based on X-ray diffraction, vibrating sample magnetometer (VSM), and differential scanning calorimetry (DSC) were presented. The amorphous alloys exhibit the soft magnetic properties of low saturated magnetization (M s ) and low coercivity (H c ) in hyeteresis loops. The thermal properties were represented by the values of glass transition temperature (T g ), curie temperature (T c ), crystallization temperature (T x ), melting temperature (T m ), T rg (defined as T g /T m ), and DeltaT x (defined as T x -T g ). Compared with the other alloys, the amorphous Co 70.5 Fe 4.5 Si 15 B 10 alloy exhibits low M s , and low saturated field (H s ). This alloy also shows estimated high T g , large DeltaT x , and high T rg . Correlations between magnetic and glass characterization of amorphous free layer and the properties of MTJs composed of amorphous free layer were discussed.</description><identifier>ISSN: 0018-9464</identifier><identifier>EISSN: 1941-0069</identifier><identifier>DOI: 10.1109/TMAG.2009.2018593</identifier><identifier>CODEN: IEMGAQ</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Alloys ; Amorphous alloys ; Amorphous magnetic materials ; Amorphous materials ; AMORPHOUS STRUCTURE ; CALORIMETRY ; Cobalt alloys ; COPPER ALLOYS (40 TO 99.3 CU) ; Copper base alloys ; Cross-disciplinary physics: materials science; rheology ; CURIE TEMPERATURE ; Differential scanning calorimetry ; Exact sciences and technology ; Free layer ; Glass ; GLASSES ; Iron alloys ; MAGNETIC PROPERTIES ; magnetic property ; Magnetic tunneling ; Magnetism ; Materials science ; metallic glass ; Metallic glasses ; MTJ ; Other topics in materials science ; Physics ; PROPERTIES ; Saturation magnetization ; Silicon alloys ; soft magnet ; Soft magnetic materials ; Temperature ; THERMAL PROPERTIES ; thermal property ; Tunnel junctions</subject><ispartof>IEEE transactions on magnetics, 2009-06, Vol.45 (6), p.2413-2416</ispartof><rights>2009 INIST-CNRS</rights><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2009</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c451t-bfbdf7178aa64c9d257cfdd5ef8a61d93ca84577315460cb9cd90c2d6e5b1e243</citedby><cites>FETCH-LOGICAL-c451t-bfbdf7178aa64c9d257cfdd5ef8a61d93ca84577315460cb9cd90c2d6e5b1e243</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/4957719$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>309,310,314,776,780,785,786,792,23910,23911,25119,27903,27904,54737</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/4957719$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=21938291$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>PARK, Joyoung</creatorcontrib><creatorcontrib>YIM, Haein</creatorcontrib><title>Designing the Composition of Amorphous Free Layer of a Magnetic Tunnel Junction</title><title>IEEE transactions on magnetics</title><addtitle>TMAG</addtitle><description>The magnetic and thermal properties of Co 70.5 Fe 4.5 Si1 5 B 10 and Ni 16 Fe 62 Si 8 B 14 quaternary amorphous alloys (metallic glasses) used for a free layer in the magnetic tunnel junctions (MTJs) were studied to correlate magnetic and glass characterization of amorphous alloys and the performance of the MTJs with amorphous free layer. The characteristics of these amorphous free layers were compared with crystalline free layers composed of Co 90 Fe 10 and Ni 20 Fe 80 and other ternary amorphous alloys composed of Co 60 Fe 20 B 20 , and Co 24 Fe 56 B 20 . Results based on X-ray diffraction, vibrating sample magnetometer (VSM), and differential scanning calorimetry (DSC) were presented. The amorphous alloys exhibit the soft magnetic properties of low saturated magnetization (M s ) and low coercivity (H c ) in hyeteresis loops. The thermal properties were represented by the values of glass transition temperature (T g ), curie temperature (T c ), crystallization temperature (T x ), melting temperature (T m ), T rg (defined as T g /T m ), and DeltaT x (defined as T x -T g ). Compared with the other alloys, the amorphous Co 70.5 Fe 4.5 Si 15 B 10 alloy exhibits low M s , and low saturated field (H s ). This alloy also shows estimated high T g , large DeltaT x , and high T rg . Correlations between magnetic and glass characterization of amorphous free layer and the properties of MTJs composed of amorphous free layer were discussed.</description><subject>Alloys</subject><subject>Amorphous alloys</subject><subject>Amorphous magnetic materials</subject><subject>Amorphous materials</subject><subject>AMORPHOUS STRUCTURE</subject><subject>CALORIMETRY</subject><subject>Cobalt alloys</subject><subject>COPPER ALLOYS (40 TO 99.3 CU)</subject><subject>Copper base alloys</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>CURIE TEMPERATURE</subject><subject>Differential scanning calorimetry</subject><subject>Exact sciences and technology</subject><subject>Free layer</subject><subject>Glass</subject><subject>GLASSES</subject><subject>Iron alloys</subject><subject>MAGNETIC PROPERTIES</subject><subject>magnetic property</subject><subject>Magnetic tunneling</subject><subject>Magnetism</subject><subject>Materials science</subject><subject>metallic glass</subject><subject>Metallic glasses</subject><subject>MTJ</subject><subject>Other topics in materials science</subject><subject>Physics</subject><subject>PROPERTIES</subject><subject>Saturation magnetization</subject><subject>Silicon alloys</subject><subject>soft magnet</subject><subject>Soft magnetic materials</subject><subject>Temperature</subject><subject>THERMAL PROPERTIES</subject><subject>thermal property</subject><subject>Tunnel junctions</subject><issn>0018-9464</issn><issn>1941-0069</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNp9kT1PwzAQhi0EEuXjByAWCwmYAr7ESeyxKt8qYimz5TqXYpTaxU4G_j2OWjEwsJx15-e9s-8l5AzYDQCTt4vX6eNNzphMAUQpiz0yAckhY6yS-2TCUjWTvOKH5CjGz5TyEtiEvN1htCtn3Yr2H0hnfr3x0fbWO-pbOl37sPnwQ6QPAZHO9TeGsa7pq1457K2hi8E57OjL4MyoOiEHre4inu7OY_L-cL-YPWXzt8fn2XSemTS3z5btsmlrqIXWFTeyycvatE1TYit0BY0sjBa8rOsCSl4xs5SmkczkTYXlEjDnxTG53vbdBP81YOzV2kaDXacdpvcqUcm0Bc5lIq_-JQvORQ2FSODFH_DTD8GlXyhRVhIEK8a5sIVM8DEGbNUm2LUO3wqYGp1QoxNqdELtnEiay11jHY3u2qCdsfFXmIMsRC4hcedbziLi7zWXaQ8J-QGBb5DG</recordid><startdate>20090601</startdate><enddate>20090601</enddate><creator>PARK, Joyoung</creator><creator>YIM, Haein</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><general>The Institute of Electrical and Electronics Engineers, Inc. (IEEE)</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope><scope>F28</scope><scope>FR3</scope><scope>H8G</scope></search><sort><creationdate>20090601</creationdate><title>Designing the Composition of Amorphous Free Layer of a Magnetic Tunnel Junction</title><author>PARK, Joyoung ; YIM, Haein</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c451t-bfbdf7178aa64c9d257cfdd5ef8a61d93ca84577315460cb9cd90c2d6e5b1e243</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Alloys</topic><topic>Amorphous alloys</topic><topic>Amorphous magnetic materials</topic><topic>Amorphous materials</topic><topic>AMORPHOUS STRUCTURE</topic><topic>CALORIMETRY</topic><topic>Cobalt alloys</topic><topic>COPPER ALLOYS (40 TO 99.3 CU)</topic><topic>Copper base alloys</topic><topic>Cross-disciplinary physics: materials science; rheology</topic><topic>CURIE TEMPERATURE</topic><topic>Differential scanning calorimetry</topic><topic>Exact sciences and technology</topic><topic>Free layer</topic><topic>Glass</topic><topic>GLASSES</topic><topic>Iron alloys</topic><topic>MAGNETIC PROPERTIES</topic><topic>magnetic property</topic><topic>Magnetic tunneling</topic><topic>Magnetism</topic><topic>Materials science</topic><topic>metallic glass</topic><topic>Metallic glasses</topic><topic>MTJ</topic><topic>Other topics in materials science</topic><topic>Physics</topic><topic>PROPERTIES</topic><topic>Saturation magnetization</topic><topic>Silicon alloys</topic><topic>soft magnet</topic><topic>Soft magnetic materials</topic><topic>Temperature</topic><topic>THERMAL PROPERTIES</topic><topic>thermal property</topic><topic>Tunnel junctions</topic><toplevel>online_resources</toplevel><creatorcontrib>PARK, Joyoung</creatorcontrib><creatorcontrib>YIM, Haein</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 2005-present</collection><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Copper Technical Reference Library</collection><jtitle>IEEE transactions on magnetics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>PARK, Joyoung</au><au>YIM, Haein</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Designing the Composition of Amorphous Free Layer of a Magnetic Tunnel Junction</atitle><jtitle>IEEE transactions on magnetics</jtitle><stitle>TMAG</stitle><date>2009-06-01</date><risdate>2009</risdate><volume>45</volume><issue>6</issue><spage>2413</spage><epage>2416</epage><pages>2413-2416</pages><issn>0018-9464</issn><eissn>1941-0069</eissn><coden>IEMGAQ</coden><abstract>The magnetic and thermal properties of Co 70.5 Fe 4.5 Si1 5 B 10 and Ni 16 Fe 62 Si 8 B 14 quaternary amorphous alloys (metallic glasses) used for a free layer in the magnetic tunnel junctions (MTJs) were studied to correlate magnetic and glass characterization of amorphous alloys and the performance of the MTJs with amorphous free layer. The characteristics of these amorphous free layers were compared with crystalline free layers composed of Co 90 Fe 10 and Ni 20 Fe 80 and other ternary amorphous alloys composed of Co 60 Fe 20 B 20 , and Co 24 Fe 56 B 20 . Results based on X-ray diffraction, vibrating sample magnetometer (VSM), and differential scanning calorimetry (DSC) were presented. The amorphous alloys exhibit the soft magnetic properties of low saturated magnetization (M s ) and low coercivity (H c ) in hyeteresis loops. The thermal properties were represented by the values of glass transition temperature (T g ), curie temperature (T c ), crystallization temperature (T x ), melting temperature (T m ), T rg (defined as T g /T m ), and DeltaT x (defined as T x -T g ). Compared with the other alloys, the amorphous Co 70.5 Fe 4.5 Si 15 B 10 alloy exhibits low M s , and low saturated field (H s ). This alloy also shows estimated high T g , large DeltaT x , and high T rg . Correlations between magnetic and glass characterization of amorphous free layer and the properties of MTJs composed of amorphous free layer were discussed.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TMAG.2009.2018593</doi><tpages>4</tpages></addata></record> |
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| subjects | Alloys Amorphous alloys Amorphous magnetic materials Amorphous materials AMORPHOUS STRUCTURE CALORIMETRY Cobalt alloys COPPER ALLOYS (40 TO 99.3 CU) Copper base alloys Cross-disciplinary physics: materials science rheology CURIE TEMPERATURE Differential scanning calorimetry Exact sciences and technology Free layer Glass GLASSES Iron alloys MAGNETIC PROPERTIES magnetic property Magnetic tunneling Magnetism Materials science metallic glass Metallic glasses MTJ Other topics in materials science Physics PROPERTIES Saturation magnetization Silicon alloys soft magnet Soft magnetic materials Temperature THERMAL PROPERTIES thermal property Tunnel junctions |
| title | Designing the Composition of Amorphous Free Layer of a Magnetic Tunnel Junction |
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