Terahertz-range free-electron laser electron spin resonance spectroscopy: Techniques and applications in high magnetic fields

Zvyagin, S. A.; Ozerov, M.; Cˇizˇmár, E.; Kamenskyi, D.; Zherlitsyn, S.; Herrmannsdörfer, T.; Wosnitza, J.; Wünsch, R.; Seidel, W.
July 2009
Review of Scientific Instruments;Jul2009, Vol. 80 Issue 7, p073102
Academic Journal
The successful use of picosecond-pulse free-electron-laser (FEL) radiation for the continuous-wave terahertz-range electron spin resonance (ESR) spectroscopy has been demonstrated. The combination of two linac-based FELs (covering the wavelength range of 4–250 μm) with pulsed magnetic fields up to 70 T allows for multifrequency ESR spectroscopy in a frequency range of 1.2–75 THz with a spectral resolution better than 1%. The performance of the spectrometer is illustrated with ESR spectra obtained in the 2,2-diphenyl-1-picrylhydrazyl and the low-dimensional organic material (C6H9N2)CuCl3.


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