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Search Publications by: Michael Schneider ()

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Displaying 26 - 36 of 36

Low-field current-hysteretic oscillations in spin-transfer nanocontacts

April 19, 2007
Author(s)
Matthew Pufall, William Rippard, Michael Schneider, Stephen E. Russek
We have measured spin-transfer-driven, large-amplitude, current-hysteretic, low frequency (less than or equal to} 500 MHz), narrowband oscillations in nanocontacts made to spin valve structures. The oscillations occur in zero field, persist up to 5 mT for

Thermal effects on the critical current of spin torque switching in spin valve nanopillars

February 28, 2007
Author(s)
Michael Schneider, Matthew Pufall, William Rippard, Stephen E. Russek, Jordan A. Katine
In spin valve nanopillars, temperature affects the spin torque reversal of the free magnetic layer. The authors compare values of zero temperature critical switching current I c0 extrapolated from room temperature pulsed current switching measurements to

Ferromagnetic resonance linewidth in metallic thin films: Comparison of measurement methods

May 22, 2006
Author(s)
Sangita S. Kalarickal, Pavol Krivosik, Mingzhong Wu, C E. Patton, Michael Schneider, Pavel Kabos, Thomas J. Silva, John P. Nibarger
Strip line (SL), vector network analyzer (VNA), and pulsed inductive microwave magnetometer (PIMM) techniques were used to measure the ferromagnetic resonance (FMR) linewidth for a series of Permalloy films with thicknesses of 50 and 100 nm. The SL-FMR

Large-angle magnetization dynamics measured by time-resolved ferromagnetic resonance

March 30, 2006
Author(s)
Thomas Gerrits, Michael Schneider, Anthony B. Kos, Thomas J. Silva
A time-resolved ferromagnetic resonance technique was used to investigate the nonlinear magnetization dynamics of a 10 nm thin Permalloy TM film in response to a sequence of large-amplitude field pulses. The magnetic field pulse sequence was set at a

Enhanced ferromagnetic damping in Permalloy/Cu bilayers

January 18, 2006
Author(s)
Thomas Gerrits, Michael Schneider, Thomas J. Silva
We have investigated the enhancement of ferromagnetic damping for thin Permalloy (Ni 80Fe 20) films grown with Cu capping layers of variable thickness (5-1000nm). The measurements were performed with a pulsed inductive microwave magnetometer in the

Dependence of magnetization dynamics on magnetostriction in NiFe alloys

December 23, 2005
Author(s)
Roberto Bonin, Michael Schneider, Thomas J. Silva, John P. Nibarger
We present a quantitative, systematic study of the effect of magnetostriction on the dynamical properties in NiFe alloys. Both the ferromagnetic resonance frequency and the damping times are correlated to the magnetostriction. In addition, we find that the

Dynamic and static magnetic anisotropy in thin-film cobalt zirconium tantalum

October 26, 2004
Author(s)
John P. Nibarger, R Ewasko, Michael Schneider, Thomas J. Silva
The magnetic anisotropy values of thin amorphous cobalt zirconium tantalum (CZT) films were determined from static and dynamic measurements. Dynamic techniques show a rotatable component of anisotropy that decreases with increasing longitudinal bias field

Finite coplanar waveguide width effects in pulsed inductive microwave magnetometry

July 12, 2004
Author(s)
Michael Schneider, Anthony B. Kos, Thomas J. Silva
The effect of finite coplanar waveguide (CPW) width on the measurement of the resonance frequency in thin ferromagnetic films has been characterized for pulsed inductive microwave magnetometry. A shift in resonant frequency is a linear function of the