Implementing Sub-ns Time Resolution into Magnetic X-rayMicroscopies

X-ray microscopies using polarized x-rays allow for imaging magnetic microstructures down to a 20 nm lateral resolution with chemical sensitivity. Utilizing the pulsed time structure of synchrotron radiation a sub-ns time resolution can be implemented by performing stroboscopic pump-and-probe experi...

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Bibliographic Details
Published inPhysica scripta Vol. T115
Main Authors Puzic, A., Stoll, H., Fischer, P., Waeyenberge, B.v., Raabe, J., Denbeaux, G., Haug, T., Weiss, D., Schutz, G.
Format Journal Article
LanguageEnglish
Published United States 04.12.2003
Subjects
36
DETECTION
MAGNETIZATION
MICROSCOPY
PERMALLOY
PROBES
PULSE RISE TIME
RESOLUTION
SENSITIVITY
STORAGE RINGS
SYNCHROTRON RADIATION
TIME RESOLUTION
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Summary:X-ray microscopies using polarized x-rays allow for imaging magnetic microstructures down to a 20 nm lateral resolution with chemical sensitivity. Utilizing the pulsed time structure of synchrotron radiation a sub-ns time resolution can be implemented by performing stroboscopic pump-and-probe experiments. The temporal evolution of the magnetization in a 50 nm thin circular permalloy element with a diameter of 2 {micro}m could be imaged with magnetic transmission x-ray microscopy. The magnetic pump pulse to the sample was generated electronically with a rise time of less than 100 ps up to 150 Oe by a microcoil. The probe pulse is the flash of the circularly polarized x-ray beam with a pulse width of about 70 ps at a frequency of 3 MHz. Images were recorded at varying delay times between pump and probe pulse up to 2000 ps. Fast detection schemes utilizing avalanche photo diodes are capable to pick individual bunches from the storage ring.
Bibliography:DE-AC02-05CH11231
LBNL-61160
USDOE Director. Office of Science. Basic EnergySciences
ISSN:0031-8949
1402-4896