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Modulation of the spectral characteristics of a nano-contact spin-torque oscillator via spin waves in an adjacent YIG film

Författare och institution:
Michael Balinsky (Institutionen för fysik (GU)); Mohammad Haidar (Institutionen för fysik (GU)); Mojtaba Ranjbar (Institutionen för fysik (GU)); Philipp Dürrenfeld (Institutionen för fysik (GU)); Afshin Houshang (Institutionen för fysik (GU)); Anderi Slavin (-); Johan Åkerman (Institutionen för fysik (GU))
Publicerad i:
IEEE Magnetics Letters, 7 ( 3101704 )
ISSN:
1949-307X
Publikationstyp:
Artikel, refereegranskad vetenskaplig
Publiceringsår:
2016
Språk:
engelska
Fulltextlänk:
Sammanfattning (abstract):
NiFe-Cu-Co trilayer nano-contact spin-torque oscillators (NC-STOs) fabricated on an yttrium-iron garnet (YIG) film were studied in two different modes. In passive mode, i.e. without any NC-STO auto-oscillations, a microwave current through the nano-contact can excite spin waves (SW) in the YIG film, and, vice versa, antenna generated SWs in the YIG film can be detected by the nano-contact. In active mode, i.e., in the presence of auto-oscillations, significant changes appear in the NC-STO spectrum when its frequency approaches that of the SWs excited in the YIG. These results demonstrate strong coupling between NC-STOs and SWs in YIG and open new possibilities of 1) pure spin-current generation in YIG by NC-STOs; 2) mutual locking of a number of NC-STOs through SWs in YIG; and 3) improvement of NC-STO spectra through SW feedback in YIG.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
NATURVETENSKAP ->
Fysik ->
Den kondenserade materiens fysik ->
Magnetism
Nyckelord:
Spin electronics, nanocontact spin-torque oscillators, spin waves (SWs), yttrium iron garnet.
Projekt:
Magnonics Using Spin Torque, spin caloritronics, And Nanoplasmonic engineerinG (MUSTANG) (EC/FP7/307144)
Postens nummer:
235391
Posten skapad:
2016-04-28 10:27
Posten ändrad:
2016-05-11 08:52

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