Microwave soft x-ray microscopy for nanoscale magnetization dynamics in the 5–10 GHz frequency range [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 2015. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- Article numbers 093,703 : digital, PDF file
- Additional Creators:
- SLAC National Accelerator Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- In this study, we present a scanning transmission x-ray microscopy setup combined with a novel microwave synchronization scheme in order to study high frequency magnetization dynamics at synchrotron light sources. The sensitivity necessary to detect small changes of the magnetization on short time scales and nanometer spatial dimensions is achieved by combination of the developed excitation mechanism with a single photon counting electronics that is locked to the synchrotron operation frequency. The required mechanical stability is achieved by a compact design of the microscope. Our instrument is capable of creating direct images of dynamical phenomena in the 5-10 GHz range, with 35 nm resolution. When used together with circularly polarized x-rays, the above capabilities can be combined to study magnetic phenomena at microwave frequencies, such as ferromagnetic resonance (FMR) and spin waves. We demonstrate the capabilities of our technique by presenting phase resolved images of a –6 GHz nanoscale spin wave generated by a spin torque oscillator, as well as the uniform ferromagnetic precession with ~0.1° amplitude at –9 GHz in a micrometer-sized cobalt strip.
- Published through SciTech Connect., 09/10/2015., "slac-pub--16710", Review of Scientific Instruments 86 9 ISSN 0034-6748; RSINAK AM, and Stefano Bonetti; Roopali Kukreja; Zhao Chen; Detlef Spoddig; Katharina Ollefs; Christian Schöppner; Ralf Meckenstock; Andreas Ney; Jude Pinto; Richard Houanche; Josef Frisch; Joachim Stöhr; Hermann A. Dürr; Hendrik Ohldag.
- Funding Information:
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