Spin-torque oscillator using a perpendicular polarizer and a planar free layer
Spintronics materials have recently been considered for radio-frequency devices such as oscillators by exploiting the transfer of spin angular momentum between a spin-polarized electrical current and the magnetic nanostructure it passes through. While previous spin-transfer oscillators (STOs) were b...
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| Veröffentlicht in: | Nature materials 2007-06, Vol.6 (6), p.447-453 |
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| creator | Houssameddine, D. Ebels, U. Delaët, B. Rodmacq, B. Firastrau, I. Ponthenier, F. Brunet, M. Thirion, C. Michel, J.-P. Prejbeanu-Buda, L. Cyrille, M.-C. Redon, O. Dieny, B. |
| description | Spintronics materials have recently been considered for radio-frequency devices such as oscillators by exploiting the transfer of spin angular momentum between a spin-polarized electrical current and the magnetic nanostructure it passes through. While previous spin-transfer oscillators (STOs) were based on in-plane magnetized structures, here we present the realization of an STO that contains a perpendicular spin current polarizer combined with an in-plane magnetized free layer. This device is characterized by high-frequency oscillations of the free-layer magnetization, consistent with out-of-plane steady-state precessions induced at the threshold current by a spin-transfer torque from perpendicularly polarized electrons. The results are summarized in static and dynamic current–field state diagrams and will be of importance for the design of STOs with enhanced output signals. |
| doi_str_mv | 10.1038/nmat1905 |
| format | Article |
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While previous spin-transfer oscillators (STOs) were based on in-plane magnetized structures, here we present the realization of an STO that contains a perpendicular spin current polarizer combined with an in-plane magnetized free layer. This device is characterized by high-frequency oscillations of the free-layer magnetization, consistent with out-of-plane steady-state precessions induced at the threshold current by a spin-transfer torque from perpendicularly polarized electrons. The results are summarized in static and dynamic current–field state diagrams and will be of importance for the design of STOs with enhanced output signals.</description><identifier>ISSN: 1476-1122</identifier><identifier>EISSN: 1476-4660</identifier><identifier>DOI: 10.1038/nmat1905</identifier><identifier>PMID: 17468761</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>Angular momentum ; Biomaterials ; Chemistry and Materials Science ; Condensed Matter Physics ; Devices ; Electric currents ; Magnetism ; Magnetization ; Materials Science ; Nanostructure ; Nanotechnology ; Optical and Electronic Materials ; Oscillations ; Oscillators ; Physics ; Polarizers ; Precession ; Threshold currents</subject><ispartof>Nature materials, 2007-06, Vol.6 (6), p.447-453</ispartof><rights>Springer Nature Limited 2007</rights><rights>Copyright Nature Publishing Group Jun 2007</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c471t-1c2d45210f18fcc8fa279a8ff9caeab071f2cfc91488d9c5016fc51b2c479ee83</citedby><cites>FETCH-LOGICAL-c471t-1c2d45210f18fcc8fa279a8ff9caeab071f2cfc91488d9c5016fc51b2c479ee83</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1038/nmat1905$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1038/nmat1905$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/17468761$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Houssameddine, D.</creatorcontrib><creatorcontrib>Ebels, U.</creatorcontrib><creatorcontrib>Delaët, B.</creatorcontrib><creatorcontrib>Rodmacq, B.</creatorcontrib><creatorcontrib>Firastrau, I.</creatorcontrib><creatorcontrib>Ponthenier, F.</creatorcontrib><creatorcontrib>Brunet, M.</creatorcontrib><creatorcontrib>Thirion, C.</creatorcontrib><creatorcontrib>Michel, J.-P.</creatorcontrib><creatorcontrib>Prejbeanu-Buda, L.</creatorcontrib><creatorcontrib>Cyrille, M.-C.</creatorcontrib><creatorcontrib>Redon, O.</creatorcontrib><creatorcontrib>Dieny, B.</creatorcontrib><title>Spin-torque oscillator using a perpendicular polarizer and a planar free layer</title><title>Nature materials</title><addtitle>Nature Mater</addtitle><addtitle>Nat Mater</addtitle><description>Spintronics materials have recently been considered for radio-frequency devices such as oscillators by exploiting the transfer of spin angular momentum between a spin-polarized electrical current and the magnetic nanostructure it passes through. While previous spin-transfer oscillators (STOs) were based on in-plane magnetized structures, here we present the realization of an STO that contains a perpendicular spin current polarizer combined with an in-plane magnetized free layer. This device is characterized by high-frequency oscillations of the free-layer magnetization, consistent with out-of-plane steady-state precessions induced at the threshold current by a spin-transfer torque from perpendicularly polarized electrons. 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| subjects | Angular momentum Biomaterials Chemistry and Materials Science Condensed Matter Physics Devices Electric currents Magnetism Magnetization Materials Science Nanostructure Nanotechnology Optical and Electronic Materials Oscillations Oscillators Physics Polarizers Precession Threshold currents |
| title | Spin-torque oscillator using a perpendicular polarizer and a planar free layer |
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