Microwave emission power exceeding 10 μW in spin torque vortex oscillator
We fabricated vortex-type spin-torque oscillators (STOs) with optimized structures to enhance the microwave emission power. Inserting a thin Co70Fe30 layer between the MgO tunnel barrier and Fe-B free layer of the STOs resulted in the magnetoresistance ratio up to 190% with a resistance area (RA) va...
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| Veröffentlicht in: | Applied physics letters 2016-12, Vol.109 (25) |
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| container_title | Applied physics letters |
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| creator | Tsunegi, Sumito Yakushiji, Kay Fukushima, Akio Yuasa, Shinji Kubota, Hitoshi |
| description | We fabricated vortex-type spin-torque oscillators (STOs) with optimized structures to enhance the microwave emission power. Inserting a thin Co70Fe30 layer between the MgO tunnel barrier and Fe-B free layer of the STOs resulted in the magnetoresistance ratio up to 190% with a resistance area (RA) value of 4.1 Ω μm2, which contributed to a large enhancement of the emission power. The optimized STO exhibited the emission power of 10.1 μW, which is the highest power from a single STO reported to date, with excellent frequency stability (f
STO/Δf = 2000 with the timing jitter of 12 ps). The results suggest that the vortex-STOs are promising candidates for next generation microwave generators. |
| doi_str_mv | 10.1063/1.4972305 |
| format | Article |
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STO/Δf = 2000 with the timing jitter of 12 ps). The results suggest that the vortex-STOs are promising candidates for next generation microwave generators.</description><subject>Applied physics</subject><subject>Frequency stability</subject><subject>Magnetoresistance</subject><subject>Magnetoresistivity</subject><subject>Microwave emission</subject><subject>Oscillators</subject><subject>Timing jitter</subject><subject>Torque</subject><subject>Vibration</subject><subject>Vortices</subject><issn>0003-6951</issn><issn>1077-3118</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqdkE1KBDEQhYMoOI4uvEHAlUKPqaTT6Sxl8A9G3CguQ-xOJENPp016fty59U6ewUN4EiM94N5NFfX4qHr1EDoGMgFSsHOY5FJQRvgOGgERImMA5S4aEUJYVkgO--ggxnkaOWVshGZ3rgp-rVcGm4WL0fkWd35tAjabypjatS8YyPf7x9fnE3Ytjl0qvQ-vS4NXPvRmg32sXNPoJB6iPaubaI62fYwery4fpjfZ7P76dnoxyypGRZ9xUSaP9bOsKbE0L0qogUprhWWVtpLnQggwjErNJWhCbNJ4VQI1gnFacDZGJ8PeLvhkJPZq7pehTScVBQocSs5Fok4HKj0YYzBWdcEtdHhTQNRvWArUNqzEng1s-qXXfUrhf3CK5A9UXW3ZD2dReC0</recordid><startdate>20161219</startdate><enddate>20161219</enddate><creator>Tsunegi, Sumito</creator><creator>Yakushiji, Kay</creator><creator>Fukushima, Akio</creator><creator>Yuasa, Shinji</creator><creator>Kubota, Hitoshi</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20161219</creationdate><title>Microwave emission power exceeding 10 μW in spin torque vortex oscillator</title><author>Tsunegi, Sumito ; Yakushiji, Kay ; Fukushima, Akio ; Yuasa, Shinji ; Kubota, Hitoshi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c327t-578972db9d20f24681d129ff7f3caf9547771e329a591a00ff955c812e7352653</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Applied physics</topic><topic>Frequency stability</topic><topic>Magnetoresistance</topic><topic>Magnetoresistivity</topic><topic>Microwave emission</topic><topic>Oscillators</topic><topic>Timing jitter</topic><topic>Torque</topic><topic>Vibration</topic><topic>Vortices</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Tsunegi, Sumito</creatorcontrib><creatorcontrib>Yakushiji, Kay</creatorcontrib><creatorcontrib>Fukushima, Akio</creatorcontrib><creatorcontrib>Yuasa, Shinji</creatorcontrib><creatorcontrib>Kubota, Hitoshi</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Applied physics letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Tsunegi, Sumito</au><au>Yakushiji, Kay</au><au>Fukushima, Akio</au><au>Yuasa, Shinji</au><au>Kubota, Hitoshi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Microwave emission power exceeding 10 μW in spin torque vortex oscillator</atitle><jtitle>Applied physics letters</jtitle><date>2016-12-19</date><risdate>2016</risdate><volume>109</volume><issue>25</issue><issn>0003-6951</issn><eissn>1077-3118</eissn><coden>APPLAB</coden><abstract>We fabricated vortex-type spin-torque oscillators (STOs) with optimized structures to enhance the microwave emission power. Inserting a thin Co70Fe30 layer between the MgO tunnel barrier and Fe-B free layer of the STOs resulted in the magnetoresistance ratio up to 190% with a resistance area (RA) value of 4.1 Ω μm2, which contributed to a large enhancement of the emission power. The optimized STO exhibited the emission power of 10.1 μW, which is the highest power from a single STO reported to date, with excellent frequency stability (f
STO/Δf = 2000 with the timing jitter of 12 ps). The results suggest that the vortex-STOs are promising candidates for next generation microwave generators.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/1.4972305</doi><tpages>4</tpages></addata></record> |
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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | Applied physics Frequency stability Magnetoresistance Magnetoresistivity Microwave emission Oscillators Timing jitter Torque Vibration Vortices |
| title | Microwave emission power exceeding 10 μW in spin torque vortex oscillator |
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