Physics – Condensed Matter – Superconductivity
Scientific paper
1998-09-28
Instruments and Techniques, Vol.39, No.5, 1996, p.769
Physics
Condensed Matter
Superconductivity
9 pages, epsfig.sty, 2 figures (Eps)
Scientific paper
A light-beam-assisted temperature-control system operating within a temperature range from 77 to 180 K is developed for investigating the absorption of electromagnetic waves by high-temperature superconductors in the vicinity of superconducting transition with an ESR spectrometer. The advantage of this system is the feasibility of modulating the temperature of a sample with a frequency of 80 Hz and amplitude of 0.01 -0.1 K. The rms temperature instability over a 5-min time interval is within 0.06 K, the temperature gradient in a sample is 0.01 K/mm for T=90 K, and the system relaxation time is 1 - 10 s. The microwave absorption peaks in the vicinity of the superconducting transition of an Y-Ba-Cu-O, single crystal were first measured at (the simultaneous application of magnetic and temperature modulations.
Aliev M. K.
Alimov G. R.
Kholbaev I.
Muminov T. M.
Olimov B.
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