Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Sankey, J. C."'
Autor:
Hirschel, M., Vadakkumbatt, V., Baker, N. P., Schweizer, F. M., Sankey, J. C., Singh, S., Davis, J. P.
The absence of a breakthrough in directly observing dark matter (DM) through prominent large-scale detectors motivates the development of novel tabletop experiments probing more exotic regions of the parameter space. If DM contains ultralight bosonic
Externí odkaz:
http://arxiv.org/abs/2309.07995
Akademický článek
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Autor:
Jayich, A. M., Sankey, J. C., Borkje, K., Lee, D., Yang, C., Underwood, M., Childress, L., Petrenko, A., Girvin, S. M., Harris, J. G. E.
We demonstrate a cryogenic optomechanical system comprising a flexible Si3N4 membrane placed at the center of a free-space optical cavity in a 400 mK cryogenic environment. We observe a mechanical quality factor Q > 4 x 10^6 for the 261-kHz fundament
Externí odkaz:
http://arxiv.org/abs/1209.2730
Autor:
Flowers-Jacobs, N. E., Hoch, S. W., Sankey, J. C., Kashkanova, A., Jayich, A. M., Deutsch, C., Reichel, J., Harris, J. G. E.
We describe an optomechanical device consisting of a fiber-based optical cavity containing a silicon nitiride membrane. In comparison with typical free-space cavities, the fiber-cavity's small mode size (10 {\mu}m waist, 80 {\mu}m length) allows the
Externí odkaz:
http://arxiv.org/abs/1206.3558
Autor:
Jayich, A. M., Sankey, J. C., Zwickl, B. M., Yang, C., Thompson, J. D., Girvin, S. M., Clerk, A. A., Marquardt, F., Harris, J. G. E.
We present the results of theoretical and experimental studies of dispersively coupled (or "membrane in the middle") optomechanical systems. We calculate the linear optical properties of a high finesse cavity containing a thin dielectric membrane. We
Externí odkaz:
http://arxiv.org/abs/0805.3723
Autor:
Thadani, K. V., Finocchio, G., Li, Z. -P., Ozatay, O., Sankey, J. C., Krivorotov, I. N., Cui, Y. -T., Buhrman, R. A., Ralph, D. C.
Publikováno v:
Phys. Rev. B 78, 024409 (2008)
We measure the microwave signals produced by spin-torque-driven magnetization dynamics in patterned magnetic multilayer devices at room temperature, as a function of the angle of a magnetic field applied in the sample plane. We find strong variations
Externí odkaz:
http://arxiv.org/abs/0803.2871
Autor:
Cui, Y. -T., Sankey, J. C., Wang, C., Thadani, K. V., Li, Z. -P., Buhrman, R. A., Ralph, D. C.
The torque generated by the transfer of spin angular momentum from a spin-polarized current to a nanoscale ferromagnet can switch the orientation of the nanomagnet much more efficiently than a current-generated magnetic field, and is therefore in dev
Externí odkaz:
http://arxiv.org/abs/0803.2880
Spin-polarized currents can transfer spin angular momentum to a ferromagnet, generating a torque that can efficiently reorient its magnetization. Achieving quantitative measurements of the spin-transfer-torque vector in magnetic tunnel junctions (MTJ
Externí odkaz:
http://arxiv.org/abs/0705.4207
Autor:
Fuchs, G. D., Sankey, J. C., Pribiag, V. S., Qian, L., Braganca, P. M., Garcia, A. G. F., Ryan, E. M., Li, Zhi-Pan, Ozatay, O., Ralph, D. C., Buhrman, R. A.
We measure the magnetic damping parameter a in thin film CoFeB and permalloy (Py) nanomagnets at room temperature using ferromagnetic resonance driven by microwave frequency spin-transfer torque. We obtain $\alpha_{CoFeB} = 0.014 \pm 0.003$ and $\alp
Externí odkaz:
http://arxiv.org/abs/cond-mat/0703577
Autor:
Krivorotov, I. N., Berkov, D. V., Gorn, N. L., Emley, N. C., Sankey, J. C., Ralph, D. C., Buhrman, R. A.
We present spectral measurements of spin-wave excitations driven by direct spinpolarized current in the free layer of nanoscale Ir20Mn80/Ni80Fe20/Cu/Ni80Fe20 spin valves. The measurements reveal that large-amplitude coherent spin wave modes are excit
Externí odkaz:
http://arxiv.org/abs/cond-mat/0703458