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arXiv · 0906.0105

THz-range free-electron laser ESR spectroscopy: techniques and applications in high magnetic fields

S. A. Zvyagin·M. Ozerov·E. Čižmár·D. Kamenskyi·S. Zherlitsyn·T. Herrmannsdörfer·J. Wosnitza·R. Wünsch·W. Seidel
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Abstract

The successful use of picosecond-pulse free-electron-laser (FEL) radiation for the continuous-wave THz-range electron spin resonance (ESR) spectroscopy has been demonstrated. The combination of two linac-based FELs (covering the wavelength range of 4 - 250 $μ$m) with pulsed magnetic fields up to 70 T allows for multi-frequency 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 (DPPH) and the low-dimensional organic material (C$_6$H$_9$N$_2$)CuCl$_3$.

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S. A. Zvyagin, M. Ozerov, E. Čižmár, D. Kamenskyi, S. Zherlitsyn, T. Herrmannsdörfer, J. Wosnitza, R. Wünsch, W. Seidel. 2009-05-30. THz-range free-electron laser ESR spectroscopy: techniques and applications in high magnetic fields. https://doi.org/10.1063/1.3155509

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