Direct-current induced dynamics in Co90 Fe10/Ni80 Fe20 point contacts.

By William H. Rippard, M. Pufall, S. Kaka, S. Russek, T. Silva. Physical Review Letters, 2003

718 citations recorded by the source corpus.

We have directly measured coherent high-frequency magnetization dynamics in ferromagnetic films induced by a spin-polarized dc current. The precession frequency can be tuned over a range of several gigahertz by varying the applied current. The frequencies of excitation also vary with applied field, resulting in a microwave oscillator that can be tuned from below 5 to above 40 GHz. This novel method of inducing high-frequency dynamics yields oscillations having quality factors from 200 to 800. We compare our results with those from single-domain simulations of current-induced dynamics.

Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/6de9d8efc5c0b67094840bfb002c9232761b1dc9

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In Atomic and Molecular Physics, and Optics

In Condensed Matter Physics

In Electronic, Optical and Magnetic Materials

Citations in the corpus

Spin-polarised currents and magnetic domain walls (2005, background): “458 , and coherent phase-locking of nearby point contact devices has been recently shown 459 , 460 .”
Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems (2018, neutral): “nents in integrated circuits (Demidov et al., 2010; Kiselev et al., 2003; Madami et al., 2011; Rippard et al., 2004; Tsoi et al., 2000).”
Nonlocal magnetization dynamics in ferromagnetic heterostructures (2004, background): “The generation of microwaves by exciting stable magnetization orbits with dc bias-dependent frequencies may also satisfy technological needs (Kiselev et al., 2003; Rippard et al., 2004).”