title: Terahertz-range free-electron laser electron spin resonance spectroscopy: techniques and applications in high magnetic fields.
abstract: 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 microm) 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.
authors: Dresden High Magnetic Field Laboratory (HLD), Forschungszentrum Dresden-Rossendorf (FZD), 01314 Dresden, Germany. s.zvyagin@fzd.de
authors: S A
authors: SA
authors: Zvyagin
authors: M
authors: M
authors: Ozerov
authors: E
authors: E
authors: Cizmár
authors: D
authors: D
authors: Kamenskyi
authors: S
authors: S
authors: Zherlitsyn
authors: T
authors: T
authors: Herrmannsdörfer
authors: J
authors: J
authors: Wosnitza
authors: R
authors: R
authors: Wünsch
authors: W
authors: W
authors: Seidel