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 (Al2SiO5) 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 $X$ -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 $F$ -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