862 citations · 2.3k across the 17 of their papers we have counts for
5 papers · 1 filter
Strong coupling of Fe-Co alloy with ultralow damping to superconducting co-planar waveguide resonators
I. W. Haygood, M. R. Pufall, E. R. J. Edwards +2
We report on the strong coupling between a metallic ferromagnetic Fe75Co25 thin film patterned element and a range of superconducting Nb half-wavelength co-planar waveguide (CPW) r…
Non-white frequency noise in spin torque oscillators and its effect on spectral linewidth
Mark W. Keller, M. R. Pufall, W. H. Rippard +1
We measure the power spectral density of frequency fluctuations in nanocontact spin torque oscillators over time scales up to 50 ms. We use a mixer to convert oscillator signals ra…
Low Field, Current-Hysteretic Oscillations in Spin Transfer Nanocontacts
M. R. Pufall, W. H . Rippard, M. Schneider +1
We have measured spin-transfer-driven, large amplitude, current hysteretic, low frequency (< 500 MHz), narrowband oscillations in nanocontacts made to spin valve structures. The os…
Spin transfer switching of spin valve nanopillars using nanosecond pulsed currents
Shehzaad Kaka, Matthew Pufall, William Rippard +4
Spin valve nanopillars are reversed via the mechanism of spin momentum transfer using current pulses applied perpendicular to the film plane of the device. The applied pulses were…
Frequency Modulation of Spin-Transfer Oscillators
M. R. Pufall, W. H. Rippard, S. Kaka +2
Spin-polarized dc electric current flowing into a magnetic layer can induce precession of the magnetization at a frequency that depends on current. We show that addition of an ac c…