Spectrometer quasi optical

The material YCaA104 is of interest for solid state lasers. The orientational dependence of the HFEPR spectra at 250 GHz was measured32 for an iron-doped crystal using a goniometer in a quasi-optical spectrometer at 253 K The spectra of Fe3+, S — 5/2, revealed the existence of two magnetically inequivalent sites of roughly equal concentration. Only the site with its z-axis along the c-axis of the crystal was studied in detail and was found to have a 0-factor close to 1.99 and a ZFS of about 29 GHz. 

The HFEPR of Ni2+ in the host Ni2CdCl6.2H20 was studied in a single crystal. The orientation dependence of the spectra at 250 GHz was measured32 using a goniometer in a quasi-optical spectrometer at 253 K. Two inequivalent sites were detected with the magnetic axes of both sites parallel to the c-axis. The 0-factor of both sites was close to 2.24 but the ZFS were -6.781 and -30.97 GHz. 

We remeasured, therefore, the cell-paste absorption by using, in this case, a quasi-optical spectrometer (23). In order to avoid wavelength-dependent diffraction of the sample, the millimeter-wave frequency was veried between 40 and 60 GHz, and the average of the apparent transmission was measured. This averag-... 

Fuchs M, Weber S, Mdbius K, Rohrer M and Prisner T 1998 A submillimeter high-field EPR spectrometer using quasi-optical microwave bridge devices Magnetic Resonance and Related Phenomena ed D Ziessow, W Lubitz and F Lendzian (Berlin Technische Universitat Berlin)... 

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