DocumentCode :
1129293
Title :
Trivalent-iron-doped andalusite as crystal for microwave waves
Author :
Eru, I.I. ; Peskovatskiy, S.A. ; Chernets, A.N.
Author_Institution :
Institute of Radiophysics and Electronics, Ukrainian Academy of Science, Kharkov, USSR
Volume :
4
Issue :
11
fYear :
1968
fDate :
11/1/1968 12:00:00 AM
Firstpage :
723
Lastpage :
727
Abstract :
Paramagnetic ions Fe3+, substituted as an impurity in andalusite (Al2 SiO5 ) host crystals, have been experimentally investigated. The spin-lattice relaxation and cross-relaxation times and inversion ratio in this spin system were observed. Dielectric properties of the host crystals were determined. General maser properties of trivalent-iron-doped andalusite crystal are discussed. Two types of the andalusite cavity masers are described. The 
-band three-level maser operates at a temperature of 2.1°K and a magnetic field of 1400 gauss. Electronic gains of 25 dB and instantaneous bandwidth of 3.5 pm 0.5 MHz, at the frequency of 9.45 GHz, were obtained. The 
-band push-pull maser operates at a temperature of 2.1°K and a magnetic field of 2800 gauss. Electronic gains of 30 dB and instantaneous bandwidth of 5.5 ± 0.5 MHZ, at the frequency of 100.4 GHz, were obtained.
-band three-level maser operates at a temperature of 2.1°K and a magnetic field of 1400 gauss. Electronic gains of 25 dB and instantaneous bandwidth of 3.5 pm 0.5 MHz, at the frequency of 9.45 GHz, were obtained. The -band push-pull maser operates at a temperature of 2.1°K and a magnetic field of 2800 gauss. Electronic gains of 30 dB and instantaneous bandwidth of 5.5 ± 0.5 MHZ, at the frequency of 100.4 GHz, were obtained.Keywords :
Bandwidth; Crystals; Frequency; Gain; Gaussian processes; Iron; Magnetic fields; Masers; Paramagnetic materials; Temperature;
fLanguage :
English
Journal_Title :
Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9197
Type :
jour
DOI :
10.1109/JQE.1968.1074969
Filename :
1074969
Link To Document :
