Effect of Temperature on Magnetic Solitons Induced by Spin-Transfer Torque

Sergi Lendínez, Jinting Hang, Saül Vélez, Joan Manel Hernández, Dirk Backes, Andrew D. Kent, Ferran Macià

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Spin-transfer torques in a nanocontact to an extended magnetic film can create spin waves that condense to form dissipative droplet solitons. Here we report an experimental study of the temperature dependence of the current and applied field thresholds for droplet soliton formation, as well as the nanocontact's electrical characteristics associated with droplet dynamics. Nucleation requires lower current densities at lower temperatures, in contrast to typical spin-transfer-torque-induced switching between static magnetic states. Magnetoresistance and electrical noise measurements (10 MHz-1 GHz) show that droplet solitons become more stable at lower temperature. These results are of fundamental interest in understanding the influence of thermal noise on droplet solitons and have implications for the design of devices using the spin-transfer-torque effects to create and control collective spin excitations.

    Original languageEnglish (US)
    Article number054027
    JournalPhysical Review Applied
    Volume7
    Issue number5
    DOIs
    StatePublished - May 31 2017

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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