ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
An easy to operate X-band electron-spin-resonance (ESR) spectrometer capable of operation down to temperatures as low as 0.4 K is described. In contrast to the usual waveguide and cavity setup, a nonmagnetic semirigid coaxial cable and a small loop are used to bring the microwave power down to the 3 He cryostat where a small-helix resonator encloses the sample. The use of a high-gain (18 dB min) and low-noise figure (3.5 dB max) X-band (8–12 GHz) microwave preamplifier in this apparatus permits the detection of a minimum of 1.5×109 spins/G at very low temperature ((approximately-equal-to) 0.4 K), very low microwave power ((approximately-equal-to)0.25 mW), and low modulation frequency (530 Hz). Typical spectra recorded with this spectrometer are also given.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1141363
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