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

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

2009-05-30

arxiv.org/abs/0906.0105v1

Rev. Scient. Instr. 80, 073102 (2009)

Physics

Condensed Matter

Materials Science

9 pages, 9 figures. Rev. Sci. Instrum., accepted

Scientific paper

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 $\mu$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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