Title :
Picosecond pulsed magnetic fields for studies of ultrafast magnetic phenomena
Author :
Freeman, M.R. ; Ruf, R.R. ; Gambino, R.J.
Author_Institution :
IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA
fDate :
11/1/1991 12:00:00 AM
Abstract :
Ultrafast optical techniques were used to develop novel time-resolved probes of magnetic dynamics. Picosecond-scale magnetic field pulses were launched from a photoconductive switch and applied to small samples which were then probed by time-delayed optical pulses, yielded temporal information in a conventional stroboscopic manner. Characteristics of the magnetic field pulses are described and illustrated through measurements of rapid relaxation effects in europium sulfide films at low temperatures
Keywords :
europium compounds; ferromagnetic properties of substances; ferromagnetic relaxation; high-speed optical techniques; magnetic semiconductors; magnetic thin films; magneto-optical effects; microwave-optical double resonance; spin-lattice relaxation; time resolved spectra; time resolved spectroscopy; EuS; ODMR; low temperatures; optical detection; photoconductive switch; picosecond pulsed magnetic fields; rapid relaxation effects; spin-lattice relaxation times; time-delayed optical pulses; time-resolved probes; ultrafast magnetic phenomena; ultrafast optical techniques adaptation; Magnetic field measurement; Magnetic fields; Magnetic switching; Optical films; Optical pulses; Optical switches; Photoconductivity; Probes; Pulse measurements; Ultrafast optics;
Journal_Title :
Magnetics, IEEE Transactions on
