Effect of Ta seed layer on crystalline structure and magnetic properties in an exchange-biased Co/IrMn system

► X-ray diffraction (XRD) patterns and grazing incidence scans revealed maximum IrMn (1 1 1) texture. ► The maximum IrMn (1 1 1) texture occurs in post-deposition annealed Ta seed layer samples. ► The IrMn (1 1 1) texture-effect significantly influences magnetic properties. ► The magnetic properties...

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Veröffentlicht in:Journal of alloys and compounds 2011-05, Vol.509 (18), p.5587-5590
Hauptverfasser: Chen, Yuan-Tsung, Lin, Y.C., Jen, S.U., Tseng, Jiun-Yi, Yao, Y.D.
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container_issue 18
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Lin, Y.C.
Jen, S.U.
Tseng, Jiun-Yi
Yao, Y.D.
description ► X-ray diffraction (XRD) patterns and grazing incidence scans revealed maximum IrMn (1 1 1) texture. ► The maximum IrMn (1 1 1) texture occurs in post-deposition annealed Ta seed layer samples. ► The IrMn (1 1 1) texture-effect significantly influences magnetic properties. ► The magnetic properties include exchange-biasing field ( H ex), interfacial energy ( J k), and coercivity ( H c). Ta-seeded and un-seeded layers of a top-configuration Co/IrMn system were deposited onto glass substrate by DC sputtering. Three sets of deposition conditions for Co(50 Å)/IrMn( t IrMn Å) and Co( t Co Å)/IrMn(90 Å), where t IrMn = 15, 30, 60, 90, 110, and 150 Å, and t Co = 15, 25, 50, 75, 100, 125, and 150 Å, were: condition (a) substrate temperature ( T s) was kept at room temperature (RT). Condition (b) T s set to RT, with in-plane magnetic field, H = 500 Oe. In condition (c), condition (b) was followed by post-deposition annealing in the magnetic field at T A = 250 °C for 1 h, then field cooled to RT. X-ray diffraction (XRD) patterns and grazing incidence scans revealed maximum IrMn (1 1 1) texture to occur for post-deposition annealed Ta seed layer samples. The IrMn (1 1 1) texture-effect significantly influences magnetic properties, including exchange-biasing field ( H ex), interfacial energy ( J k), and coercivity ( H c). The Ta seed layer also significantly influences magnetic properties. Adding a Ta seed layer to the Co/IrMn system increases H ex, because of the IrMn (1 1 1) texture. For Ta-seeded Co/IrMn under condition (c), H ex tended to saturate for t IrMn ≥ 90 Å. Under conditions (a) and (b), H ex decreased with increasing t IrMn for t IrMn ≥ 90 Å. H ex values for all un-seeded Co/IrMn systems increased with t IrMn. J k versus t IrMn plot is proportional only to H ex in the Ta-seeded and un-seeded layers of a top-configuration Co/IrMn system, due to the interfacial energy formula, t Co is fixed, and saturation magnetization ( M s) of the Co layer is constant. Results for the Ta-seeded system showed a strong relationship between H c and t IrMn, due to coupling-decoupling interactions between Co spin, and IrMn layers close to the Co/IrMn interface. The H ex versus t Co result shows that the H ex is proportional to (1/ t Co). The H ex values with the Ta seed layer are almost slightly larger than those without a Ta seed-layer. The dependence of J k on t Co is similar to the trend in M s on t Co, J k tends to saturate slowly as t Co increases. Surface pinning occur
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Ta-seeded and un-seeded layers of a top-configuration Co/IrMn system were deposited onto glass substrate by DC sputtering. Three sets of deposition conditions for Co(50 Å)/IrMn( t IrMn Å) and Co( t Co Å)/IrMn(90 Å), where t IrMn = 15, 30, 60, 90, 110, and 150 Å, and t Co = 15, 25, 50, 75, 100, 125, and 150 Å, were: condition (a) substrate temperature ( T s) was kept at room temperature (RT). Condition (b) T s set to RT, with in-plane magnetic field, H = 500 Oe. In condition (c), condition (b) was followed by post-deposition annealing in the magnetic field at T A = 250 °C for 1 h, then field cooled to RT. X-ray diffraction (XRD) patterns and grazing incidence scans revealed maximum IrMn (1 1 1) texture to occur for post-deposition annealed Ta seed layer samples. The IrMn (1 1 1) texture-effect significantly influences magnetic properties, including exchange-biasing field ( H ex), interfacial energy ( J k), and coercivity ( H c). The Ta seed layer also significantly influences magnetic properties. Adding a Ta seed layer to the Co/IrMn system increases H ex, because of the IrMn (1 1 1) texture. For Ta-seeded Co/IrMn under condition (c), H ex tended to saturate for t IrMn ≥ 90 Å. Under conditions (a) and (b), H ex decreased with increasing t IrMn for t IrMn ≥ 90 Å. H ex values for all un-seeded Co/IrMn systems increased with t IrMn. J k versus t IrMn plot is proportional only to H ex in the Ta-seeded and un-seeded layers of a top-configuration Co/IrMn system, due to the interfacial energy formula, t Co is fixed, and saturation magnetization ( M s) of the Co layer is constant. Results for the Ta-seeded system showed a strong relationship between H c and t IrMn, due to coupling-decoupling interactions between Co spin, and IrMn layers close to the Co/IrMn interface. The H ex versus t Co result shows that the H ex is proportional to (1/ t Co). The H ex values with the Ta seed layer are almost slightly larger than those without a Ta seed-layer. The dependence of J k on t Co is similar to the trend in M s on t Co, J k tends to saturate slowly as t Co increases. Surface pinning occurred in all systems, revealing an inverse relation between H c and t Co. Removing the Ta seed-layer weakens IrMn (1 1 1) texturing, reducing H ex. The maximum observed H ex and J k values were 205 Oe and 0.11 erg/cm 2, respectively.</description><identifier>ISSN: 0925-8388</identifier><identifier>EISSN: 1873-4669</identifier><identifier>DOI: 10.1016/j.jallcom.2011.01.218</identifier><language>eng</language><publisher>Kidlington: Elsevier B.V</publisher><subject>Annealing ; Coercivity ( Hc) ; Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Condensed matter: structure, mechanical and thermal properties ; Exact sciences and technology ; Exchange ; Exchange-biasing field ( Hex) ; Inorganic compounds ; IrMn texture ; Magnetic fields ; Magnetic properties ; Magnetic properties and materials ; Magnetic properties of monolayers and thin films ; Magnetic properties of surface, thin films and multilayers ; Physics ; Seed layer effect ; Seeds ; Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.) ; Structure of solids and liquids; crystallography ; Structure of specific crystalline solids ; Surface layer ; Tantalum ; Texture</subject><ispartof>Journal of alloys and compounds, 2011-05, Vol.509 (18), p.5587-5590</ispartof><rights>2011 Elsevier B.V.</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c371t-1eb33eb53f5724c1e6f4733639de25126298ff63ddbd9a5b77f37deef7d365de3</citedby><cites>FETCH-LOGICAL-c371t-1eb33eb53f5724c1e6f4733639de25126298ff63ddbd9a5b77f37deef7d365de3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jallcom.2011.01.218$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3548,27922,27923,45993</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=24081897$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Chen, Yuan-Tsung</creatorcontrib><creatorcontrib>Lin, Y.C.</creatorcontrib><creatorcontrib>Jen, S.U.</creatorcontrib><creatorcontrib>Tseng, Jiun-Yi</creatorcontrib><creatorcontrib>Yao, Y.D.</creatorcontrib><title>Effect of Ta seed layer on crystalline structure and magnetic properties in an exchange-biased Co/IrMn system</title><title>Journal of alloys and compounds</title><description>► X-ray diffraction (XRD) patterns and grazing incidence scans revealed maximum IrMn (1 1 1) texture. ► The maximum IrMn (1 1 1) texture occurs in post-deposition annealed Ta seed layer samples. ► The IrMn (1 1 1) texture-effect significantly influences magnetic properties. ► The magnetic properties include exchange-biasing field ( H ex), interfacial energy ( J k), and coercivity ( H c). Ta-seeded and un-seeded layers of a top-configuration Co/IrMn system were deposited onto glass substrate by DC sputtering. Three sets of deposition conditions for Co(50 Å)/IrMn( t IrMn Å) and Co( t Co Å)/IrMn(90 Å), where t IrMn = 15, 30, 60, 90, 110, and 150 Å, and t Co = 15, 25, 50, 75, 100, 125, and 150 Å, were: condition (a) substrate temperature ( T s) was kept at room temperature (RT). Condition (b) T s set to RT, with in-plane magnetic field, H = 500 Oe. In condition (c), condition (b) was followed by post-deposition annealing in the magnetic field at T A = 250 °C for 1 h, then field cooled to RT. X-ray diffraction (XRD) patterns and grazing incidence scans revealed maximum IrMn (1 1 1) texture to occur for post-deposition annealed Ta seed layer samples. The IrMn (1 1 1) texture-effect significantly influences magnetic properties, including exchange-biasing field ( H ex), interfacial energy ( J k), and coercivity ( H c). The Ta seed layer also significantly influences magnetic properties. Adding a Ta seed layer to the Co/IrMn system increases H ex, because of the IrMn (1 1 1) texture. For Ta-seeded Co/IrMn under condition (c), H ex tended to saturate for t IrMn ≥ 90 Å. Under conditions (a) and (b), H ex decreased with increasing t IrMn for t IrMn ≥ 90 Å. H ex values for all un-seeded Co/IrMn systems increased with t IrMn. J k versus t IrMn plot is proportional only to H ex in the Ta-seeded and un-seeded layers of a top-configuration Co/IrMn system, due to the interfacial energy formula, t Co is fixed, and saturation magnetization ( M s) of the Co layer is constant. Results for the Ta-seeded system showed a strong relationship between H c and t IrMn, due to coupling-decoupling interactions between Co spin, and IrMn layers close to the Co/IrMn interface. The H ex versus t Co result shows that the H ex is proportional to (1/ t Co). The H ex values with the Ta seed layer are almost slightly larger than those without a Ta seed-layer. The dependence of J k on t Co is similar to the trend in M s on t Co, J k tends to saturate slowly as t Co increases. Surface pinning occurred in all systems, revealing an inverse relation between H c and t Co. Removing the Ta seed-layer weakens IrMn (1 1 1) texturing, reducing H ex. The maximum observed H ex and J k values were 205 Oe and 0.11 erg/cm 2, respectively.</description><subject>Annealing</subject><subject>Coercivity ( Hc)</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Condensed matter: structure, mechanical and thermal properties</subject><subject>Exact sciences and technology</subject><subject>Exchange</subject><subject>Exchange-biasing field ( Hex)</subject><subject>Inorganic compounds</subject><subject>IrMn texture</subject><subject>Magnetic fields</subject><subject>Magnetic properties</subject><subject>Magnetic properties and materials</subject><subject>Magnetic properties of monolayers and thin films</subject><subject>Magnetic properties of surface, thin films and multilayers</subject><subject>Physics</subject><subject>Seed layer effect</subject><subject>Seeds</subject><subject>Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)</subject><subject>Structure of solids and liquids; crystallography</subject><subject>Structure of specific crystalline solids</subject><subject>Surface layer</subject><subject>Tantalum</subject><subject>Texture</subject><issn>0925-8388</issn><issn>1873-4669</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNqFkMFu1DAQhi0EEkvhEZB8QZySeuKN7ZwQWrVQqVUv5Ww59rh4lTiLJ4vYt8fVrrhymsP8883Mx9hHEC0IUNf7du-myS9z2wmAVkDbgXnFNmC0bLZKDa_ZRgxd3xhpzFv2jmgvhIBBwobNNzGiX_kS-ZPjhBj45E5Y-JK5LydaKzll5LSWo1-PBbnLgc_uOeOaPD-U5YBlTUg85dri-Mf_dPkZmzE5qrDdcn1XHjKnisL5PXsT3UT44VKv2I_bm6fd9-b-8dvd7ut946WGtQEcpcSxl7HX3dYDqrjVUio5BOx66FQ3mBiVDGEMg-tHraPUATHqIFUfUF6xz2duve_XEWm1cyKP0-QyLkeyxgxbYZSCmuzPSV8WooLRHkqaXTlZEPbFrt3bi137YtcKsNVunft02eDIuykWl32if8NdxYMZdM19Oeewvvs7YbHkE2aPIZXq3YYl_WfTX8WilEM</recordid><startdate>20110505</startdate><enddate>20110505</enddate><creator>Chen, Yuan-Tsung</creator><creator>Lin, Y.C.</creator><creator>Jen, S.U.</creator><creator>Tseng, Jiun-Yi</creator><creator>Yao, Y.D.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20110505</creationdate><title>Effect of Ta seed layer on crystalline structure and magnetic properties in an exchange-biased Co/IrMn system</title><author>Chen, Yuan-Tsung ; Lin, Y.C. ; Jen, S.U. ; Tseng, Jiun-Yi ; Yao, Y.D.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c371t-1eb33eb53f5724c1e6f4733639de25126298ff63ddbd9a5b77f37deef7d365de3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Annealing</topic><topic>Coercivity ( Hc)</topic><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Condensed matter: structure, mechanical and thermal properties</topic><topic>Exact sciences and technology</topic><topic>Exchange</topic><topic>Exchange-biasing field ( Hex)</topic><topic>Inorganic compounds</topic><topic>IrMn texture</topic><topic>Magnetic fields</topic><topic>Magnetic properties</topic><topic>Magnetic properties and materials</topic><topic>Magnetic properties of monolayers and thin films</topic><topic>Magnetic properties of surface, thin films and multilayers</topic><topic>Physics</topic><topic>Seed layer effect</topic><topic>Seeds</topic><topic>Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)</topic><topic>Structure of solids and liquids; crystallography</topic><topic>Structure of specific crystalline solids</topic><topic>Surface layer</topic><topic>Tantalum</topic><topic>Texture</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chen, Yuan-Tsung</creatorcontrib><creatorcontrib>Lin, Y.C.</creatorcontrib><creatorcontrib>Jen, S.U.</creatorcontrib><creatorcontrib>Tseng, Jiun-Yi</creatorcontrib><creatorcontrib>Yao, Y.D.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of alloys and compounds</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chen, Yuan-Tsung</au><au>Lin, Y.C.</au><au>Jen, S.U.</au><au>Tseng, Jiun-Yi</au><au>Yao, Y.D.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of Ta seed layer on crystalline structure and magnetic properties in an exchange-biased Co/IrMn system</atitle><jtitle>Journal of alloys and compounds</jtitle><date>2011-05-05</date><risdate>2011</risdate><volume>509</volume><issue>18</issue><spage>5587</spage><epage>5590</epage><pages>5587-5590</pages><issn>0925-8388</issn><eissn>1873-4669</eissn><abstract>► X-ray diffraction (XRD) patterns and grazing incidence scans revealed maximum IrMn (1 1 1) texture. ► The maximum IrMn (1 1 1) texture occurs in post-deposition annealed Ta seed layer samples. ► The IrMn (1 1 1) texture-effect significantly influences magnetic properties. ► The magnetic properties include exchange-biasing field ( H ex), interfacial energy ( J k), and coercivity ( H c). Ta-seeded and un-seeded layers of a top-configuration Co/IrMn system were deposited onto glass substrate by DC sputtering. Three sets of deposition conditions for Co(50 Å)/IrMn( t IrMn Å) and Co( t Co Å)/IrMn(90 Å), where t IrMn = 15, 30, 60, 90, 110, and 150 Å, and t Co = 15, 25, 50, 75, 100, 125, and 150 Å, were: condition (a) substrate temperature ( T s) was kept at room temperature (RT). Condition (b) T s set to RT, with in-plane magnetic field, H = 500 Oe. In condition (c), condition (b) was followed by post-deposition annealing in the magnetic field at T A = 250 °C for 1 h, then field cooled to RT. X-ray diffraction (XRD) patterns and grazing incidence scans revealed maximum IrMn (1 1 1) texture to occur for post-deposition annealed Ta seed layer samples. The IrMn (1 1 1) texture-effect significantly influences magnetic properties, including exchange-biasing field ( H ex), interfacial energy ( J k), and coercivity ( H c). The Ta seed layer also significantly influences magnetic properties. Adding a Ta seed layer to the Co/IrMn system increases H ex, because of the IrMn (1 1 1) texture. For Ta-seeded Co/IrMn under condition (c), H ex tended to saturate for t IrMn ≥ 90 Å. Under conditions (a) and (b), H ex decreased with increasing t IrMn for t IrMn ≥ 90 Å. H ex values for all un-seeded Co/IrMn systems increased with t IrMn. J k versus t IrMn plot is proportional only to H ex in the Ta-seeded and un-seeded layers of a top-configuration Co/IrMn system, due to the interfacial energy formula, t Co is fixed, and saturation magnetization ( M s) of the Co layer is constant. Results for the Ta-seeded system showed a strong relationship between H c and t IrMn, due to coupling-decoupling interactions between Co spin, and IrMn layers close to the Co/IrMn interface. The H ex versus t Co result shows that the H ex is proportional to (1/ t Co). The H ex values with the Ta seed layer are almost slightly larger than those without a Ta seed-layer. The dependence of J k on t Co is similar to the trend in M s on t Co, J k tends to saturate slowly as t Co increases. Surface pinning occurred in all systems, revealing an inverse relation between H c and t Co. Removing the Ta seed-layer weakens IrMn (1 1 1) texturing, reducing H ex. The maximum observed H ex and J k values were 205 Oe and 0.11 erg/cm 2, respectively.</abstract><cop>Kidlington</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jallcom.2011.01.218</doi><tpages>4</tpages></addata></record>
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source ScienceDirect Journals (5 years ago - present)
subjects Annealing
Coercivity ( Hc)
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Exchange
Exchange-biasing field ( Hex)
Inorganic compounds
IrMn texture
Magnetic fields
Magnetic properties
Magnetic properties and materials
Magnetic properties of monolayers and thin films
Magnetic properties of surface, thin films and multilayers
Physics
Seed layer effect
Seeds
Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
Surface layer
Tantalum
Texture
title Effect of Ta seed layer on crystalline structure and magnetic properties in an exchange-biased Co/IrMn system
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