Spin in organics: a new route to spintronics
New developments in the nascent field of organic spintronics are discussed. Two classes of phenomena can be discerned. In hybrid organic spin valves (OSVs), an organic semiconducting film is sandwiched between two ferromagnetic (FM) thin films, aiming at magnetoresistive effects as a function of the...
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| Veröffentlicht in: | Philosophical transactions of the Royal Society of London. Series A: Mathematical, physical, and engineering sciences physical, and engineering sciences, 2011-09, Vol.369 (1951), p.3602-3616 |
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| container_end_page | 3616 |
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| container_issue | 1951 |
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| container_title | Philosophical transactions of the Royal Society of London. Series A: Mathematical, physical, and engineering sciences |
| container_volume | 369 |
| creator | Koopmans, Bert Wagemans, Wiebe Bloom, Francisco L. Bobbert, Peter A. Kemerink, Martijn Wohlgenannt, Markus |
| description | New developments in the nascent field of organic spintronics are discussed. Two classes of phenomena can be discerned. In hybrid organic spin valves (OSVs), an organic semiconducting film is sandwiched between two ferromagnetic (FM) thin films, aiming at magnetoresistive effects as a function of the relative alignment of the respective magnetization directions. Alternatively, organic magnetoresistance (OMAR) is achieved without any FM components, and is an intrinsic property of the organic semiconductor material. Some of the exciting characteristics of OMAR, in both electrical conductance and photoconductance, are presented. A systematic, combined experimental—theoretical study of sign changes between positive and negative magnetoresistance is shown to provide important insight about the underlying mechanisms of OMAR. A simple explanation of experimental observations is obtained by combining a 'spin-blocking' mechanism, an essential ingredient in the recently proposed bipolaron model, with specific features of the device physics of space charge limited current devices in the bipolar regime. Finally, we discuss possible links between the physics relevant for OMAR and that for OSVs. More specifically, weak hyperfine fields from the hydrogen atoms in organic materials are thought to be crucial for a proper understanding of both types of phenomena. |
| doi_str_mv | 10.1098/rsta.2011.0172 |
| format | Article |
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Two classes of phenomena can be discerned. In hybrid organic spin valves (OSVs), an organic semiconducting film is sandwiched between two ferromagnetic (FM) thin films, aiming at magnetoresistive effects as a function of the relative alignment of the respective magnetization directions. Alternatively, organic magnetoresistance (OMAR) is achieved without any FM components, and is an intrinsic property of the organic semiconductor material. Some of the exciting characteristics of OMAR, in both electrical conductance and photoconductance, are presented. A systematic, combined experimental—theoretical study of sign changes between positive and negative magnetoresistance is shown to provide important insight about the underlying mechanisms of OMAR. A simple explanation of experimental observations is obtained by combining a 'spin-blocking' mechanism, an essential ingredient in the recently proposed bipolaron model, with specific features of the device physics of space charge limited current devices in the bipolar regime. Finally, we discuss possible links between the physics relevant for OMAR and that for OSVs. More specifically, weak hyperfine fields from the hydrogen atoms in organic materials are thought to be crucial for a proper understanding of both types of phenomena.</description><identifier>ISSN: 1364-503X</identifier><identifier>ISSN: 1471-2962</identifier><identifier>EISSN: 1471-2962</identifier><identifier>DOI: 10.1098/rsta.2011.0172</identifier><identifier>PMID: 21859724</identifier><language>eng</language><publisher>England: The Royal Society</publisher><subject>Charge carriers ; Electric Conductivity ; Electric current ; Electric potential ; Electronics ; Electrons ; Magnetic fields ; Magnetics ; Magnetoresistance ; Minority carriers ; Models, Chemical ; Models, Statistical ; Narrative devices ; Organic Chemicals - chemistry ; Organic Electronics ; Organic Magnetoresistance ; Organic semiconductors ; Photons ; Physics ; Physics - methods ; Review ; Room temperature ; Semiconductors ; Spintronics ; Surface Properties</subject><ispartof>Philosophical transactions of the Royal Society of London. 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Series A: Mathematical, physical, and engineering sciences</title><addtitle>Proc. R. Soc. A</addtitle><addtitle>Philos Trans A Math Phys Eng Sci</addtitle><description>New developments in the nascent field of organic spintronics are discussed. Two classes of phenomena can be discerned. In hybrid organic spin valves (OSVs), an organic semiconducting film is sandwiched between two ferromagnetic (FM) thin films, aiming at magnetoresistive effects as a function of the relative alignment of the respective magnetization directions. Alternatively, organic magnetoresistance (OMAR) is achieved without any FM components, and is an intrinsic property of the organic semiconductor material. Some of the exciting characteristics of OMAR, in both electrical conductance and photoconductance, are presented. A systematic, combined experimental—theoretical study of sign changes between positive and negative magnetoresistance is shown to provide important insight about the underlying mechanisms of OMAR. A simple explanation of experimental observations is obtained by combining a 'spin-blocking' mechanism, an essential ingredient in the recently proposed bipolaron model, with specific features of the device physics of space charge limited current devices in the bipolar regime. Finally, we discuss possible links between the physics relevant for OMAR and that for OSVs. More specifically, weak hyperfine fields from the hydrogen atoms in organic materials are thought to be crucial for a proper understanding of both types of phenomena.</description><subject>Charge carriers</subject><subject>Electric Conductivity</subject><subject>Electric current</subject><subject>Electric potential</subject><subject>Electronics</subject><subject>Electrons</subject><subject>Magnetic fields</subject><subject>Magnetics</subject><subject>Magnetoresistance</subject><subject>Minority carriers</subject><subject>Models, Chemical</subject><subject>Models, Statistical</subject><subject>Narrative devices</subject><subject>Organic Chemicals - chemistry</subject><subject>Organic Electronics</subject><subject>Organic Magnetoresistance</subject><subject>Organic semiconductors</subject><subject>Photons</subject><subject>Physics</subject><subject>Physics - methods</subject><subject>Review</subject><subject>Room temperature</subject><subject>Semiconductors</subject><subject>Spintronics</subject><subject>Surface Properties</subject><issn>1364-503X</issn><issn>1471-2962</issn><issn>1471-2962</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9kN1rFDEUxUNR2lp97Vtl3nxx1txk8uXbUj-hINgqvl0yabZkuzsZkxnL-tebcWqlFIVAEu7vnnPvIeQY6AKo0a9SHuyCUYAFBcX2yCE0CmpmJHtU3lw2taD82wF5kvOaFkwKtk8OGGhhFGsOycvzPnRVOTFd2S64_LqyVedvqhTHwVdDrHIBhhSn2lPyeGU32T-7vY_Il3dvL04_1Gef3n88XZ7VTtJmqFe0bd2laLxSVkmlbQMNBaq1E17z1hlBvdFSOQWgjfCtWmkLlnsOThtm-BGpZ9184_uxxT6FrU07jDbgm_B1iWVY3IQRoSgLXfgXM9-n-H30ecBtyM5vNrbzccyotaACGEzKi5l0Keac_OpOGyhOgeIUKE6B4hRoaXh-Kz22W395h_9JsADXM5DirmQSXfDDDtdxTF354ufzi-UPLk0AI4qk5kAlp8Lgz9DPXqWIIefR42_kvv_Dcfj_3P65xMnctc5DTH934JQLIwX_BRQHrZ0</recordid><startdate>20110928</startdate><enddate>20110928</enddate><creator>Koopmans, Bert</creator><creator>Wagemans, Wiebe</creator><creator>Bloom, Francisco L.</creator><creator>Bobbert, Peter A.</creator><creator>Kemerink, Martijn</creator><creator>Wohlgenannt, Markus</creator><general>The Royal Society</general><general>The Royal Society Publishing</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>ADTPV</scope><scope>AOWAS</scope><scope>DG8</scope></search><sort><creationdate>20110928</creationdate><title>Spin in organics: a new route to spintronics</title><author>Koopmans, Bert ; Wagemans, Wiebe ; Bloom, Francisco L. ; Bobbert, Peter A. ; Kemerink, Martijn ; Wohlgenannt, Markus</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c604t-f0bbcd54e77a7678a41401088c5e83bc950e9867c711895eb7f8a1a3e31c89293</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Charge carriers</topic><topic>Electric Conductivity</topic><topic>Electric current</topic><topic>Electric potential</topic><topic>Electronics</topic><topic>Electrons</topic><topic>Magnetic fields</topic><topic>Magnetics</topic><topic>Magnetoresistance</topic><topic>Minority carriers</topic><topic>Models, Chemical</topic><topic>Models, Statistical</topic><topic>Narrative devices</topic><topic>Organic Chemicals - chemistry</topic><topic>Organic Electronics</topic><topic>Organic Magnetoresistance</topic><topic>Organic semiconductors</topic><topic>Photons</topic><topic>Physics</topic><topic>Physics - methods</topic><topic>Review</topic><topic>Room temperature</topic><topic>Semiconductors</topic><topic>Spintronics</topic><topic>Surface Properties</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Koopmans, Bert</creatorcontrib><creatorcontrib>Wagemans, Wiebe</creatorcontrib><creatorcontrib>Bloom, Francisco L.</creatorcontrib><creatorcontrib>Bobbert, Peter A.</creatorcontrib><creatorcontrib>Kemerink, Martijn</creatorcontrib><creatorcontrib>Wohlgenannt, Markus</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>SwePub</collection><collection>SwePub Articles</collection><collection>SWEPUB Linköpings universitet</collection><jtitle>Philosophical transactions of the Royal Society of London. 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| ispartof | Philosophical transactions of the Royal Society of London. Series A: Mathematical, physical, and engineering sciences, 2011-09, Vol.369 (1951), p.3602-3616 |
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| source | MEDLINE; JSTOR Mathematics & Statistics; Alma/SFX Local Collection; Free Full-Text Journals in Chemistry |
| subjects | Charge carriers Electric Conductivity Electric current Electric potential Electronics Electrons Magnetic fields Magnetics Magnetoresistance Minority carriers Models, Chemical Models, Statistical Narrative devices Organic Chemicals - chemistry Organic Electronics Organic Magnetoresistance Organic semiconductors Photons Physics Physics - methods Review Room temperature Semiconductors Spintronics Surface Properties |
| title | Spin in organics: a new route to spintronics |
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