Ferromagnetic resonance driven by an ac current: a brief review

• Veröffentlicht in: Физика низких температур
• Datum: 2013
• Hauptverfasser: Wang, C., Seinige, H., Tsoi, M.
• Format: Artikel
• Sprache: Englisch
• Veröffentlicht: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2013
• Schlagworte: К 75-летию со дня рождения И. К. Янсона
• Online Zugang: https://nasplib.isofts.kiev.ua/handle/123456789/118222
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Zitieren: Ferromagnetic resonance driven by an ac current:
 a brief review / C. Wang, H. Seinige, M. Tsoi // Физика низких температур. — 2013. — Т. 39, № 3. — С. 320–325. — Бібліогр.: 30 назв. — англ.

Excitation of ferromagnetic resonance (FMR) by an ac current has been observed in macroscopic ferromagnetic
 films for decades and typically relies on the ac Oersted field of the current to drive magnetic moments into
 precession and classical rectification of ac signals to detect the resonance. Recently, current-driven ferromagnetic
 resonances have attracted renewed attention with the discovery of the spin-transfer torque (STT) effect due to
 its potential applications in magnetic memory and microwave technologies. Here STT associated with the ac current
 is used to drive magnetodynamics on the nanoscale that enables FMR studies in sample volumes smaller by
 a factor of 1000 compared to conventional resonance techniques. In this paper, we briefly review the basics of
 STT–FMR technique and the results of various STT–FMR experiments.