TY - JOUR
T1 - Benchtop time-resolved magneto-optical Kerr magnetometer
AU - Barman, Anjan
AU - Kimura, T.
AU - Otani, Y.
AU - Fukuma, Y.
AU - Akahane, K.
AU - Meguro, S.
N1 - Funding Information:
The authors gratefully acknowledge the assistance of R. Antos and J. B. Harmle and fruitful discussions with Y. Acremann. Financial assistance from Ministry of Education, Science, Sports and Culture of Japan, Grant in Aid for Scientific Research (S) is also gratefully acknowledged.
PY - 2008
Y1 - 2008
N2 - We present here the construction and application of a compact benchtop time-resolved Kerr magnetometer to measure the magnetization precession in magnetic thin films and lithographically patterned elements. As opposed to very expensive femtosecond lasers this system is built upon a picosecond pulsed injection diode laser and electronic pulse and delay generators. The precession is triggered by the electronic pulses of controlled duration and shape, which is launched onto the sample by a microstrip line. We used polarized optical pulses synchronous to the electronic pulses to measure the magneto-optical Kerr rotation. The system is integrated in a conventional upright microscope configuration with separate illumination, imaging, and magneto-optical probe paths. The system offers high stability, relative ease of alignment, sample changing, and a long range of time delay. We demonstrate the measurements of time-resolved dynamics of a Permalloy microwire and microdot using this system, which showed dynamics at two different time scales.
AB - We present here the construction and application of a compact benchtop time-resolved Kerr magnetometer to measure the magnetization precession in magnetic thin films and lithographically patterned elements. As opposed to very expensive femtosecond lasers this system is built upon a picosecond pulsed injection diode laser and electronic pulse and delay generators. The precession is triggered by the electronic pulses of controlled duration and shape, which is launched onto the sample by a microstrip line. We used polarized optical pulses synchronous to the electronic pulses to measure the magneto-optical Kerr rotation. The system is integrated in a conventional upright microscope configuration with separate illumination, imaging, and magneto-optical probe paths. The system offers high stability, relative ease of alignment, sample changing, and a long range of time delay. We demonstrate the measurements of time-resolved dynamics of a Permalloy microwire and microdot using this system, which showed dynamics at two different time scales.
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U2 - 10.1063/1.3053353
DO - 10.1063/1.3053353
M3 - Article
C2 - 19123577
AN - SCOPUS:58149252735
VL - 79
JO - Review of Scientific Instruments
JF - Review of Scientific Instruments
SN - 0034-6748
IS - 12
M1 - 123905
ER -