TY - JOUR
T1 - Electron spin resonance studies of the organic superconductor β″-(BEDT-TTF)4[ (H3O)Fe(C2O4)3] C6H5CN
AU - Narduzzo, Alessandro
AU - Ardavan, A
AU - Singleton, J
AU - Pardi, L
AU - Bercu, V
AU - Akutsu-Sato, A
AU - Akutsu, H
AU - Turner, S S
AU - Day, P
PY - 2004/4
Y1 - 2004/4
N2 - We applied magneto-optical techniques to investigate the electron spin resonance (ESR) spectra of single crystal and powder samples of the organic superconductor ${\beta''}$-(BEDT- TTF) 4[ (H 3O)Fe (C 2O 4) 3] C 6H 5CN. Data were obtained in magnetic fields up to 10 Tesla using both cylindrical and rectangular resonators at 55, 63 and 72 GHz and transmission measurements at 95 and 190 GHz with field modulation. Analysis of the high field-high frequency ESR lines for different field orientations and temperatures allows the determination of the g-value anisotropy and the zero-field splitting parameters for the Fe 3+ ions ( S=5/2), showing that they occupy a site with distorted octahedral symmetry. The temperature and frequency dependences of the magneto-optical spectra are used to identify the nature of the interaction between localised Fe spins and between the local moments and the delocalised carriers.
AB - We applied magneto-optical techniques to investigate the electron spin resonance (ESR) spectra of single crystal and powder samples of the organic superconductor ${\beta''}$-(BEDT- TTF) 4[ (H 3O)Fe (C 2O 4) 3] C 6H 5CN. Data were obtained in magnetic fields up to 10 Tesla using both cylindrical and rectangular resonators at 55, 63 and 72 GHz and transmission measurements at 95 and 190 GHz with field modulation. Analysis of the high field-high frequency ESR lines for different field orientations and temperatures allows the determination of the g-value anisotropy and the zero-field splitting parameters for the Fe 3+ ions ( S=5/2), showing that they occupy a site with distorted octahedral symmetry. The temperature and frequency dependences of the magneto-optical spectra are used to identify the nature of the interaction between localised Fe spins and between the local moments and the delocalised carriers.
UR - http://dx.doi.org/10.1051/jp4:2004114079
U2 - 10.1051/jp4:2004114079
DO - 10.1051/jp4:2004114079
M3 - Article
SN - 1155-4339
VL - 114
SP - 347
EP - 349
JO - Journal De Physique Iv
JF - Journal De Physique Iv
ER -