Ferromagnetic Josephson resonance

強磁性ジョセフソン共鳴

In a superconductor/ ferromagnet/ supereconductor (SC/ FM/ SC) Josephson junction, the coupling between the electromagnetic field and the phase dynamics of the superconducting wave function induces the spin waves. We report here that in the junction, a magnetic resonace of frequency ws appears as a depression in the current (I) - voltage (V) curve of the Josephson junction when hws = 2 eV. In the spintronics context, the ferromagnetic Josephson resonance is a photon-free FMR on a nano-magnet, which would be unfeasible with standard FMR techniques and illustrate a new method for study of spin dynamics.

使用言語	:	English
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発表会議名	:	9th International Conference on Spectroscopies in Novel Superconductors (SNS 2010)
開催年月	:	2010/05
開催都市	:	Shanghai
開催国	:	China
キーワード	:	no keyword

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受委託・共同研究相手機関	:	科学技術振興機構

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