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ESR Spectrometry of High-Temperature Superconductors with Temperature-Modulation-Based Thermoregulation

M. K. Aliev·G. R. Alimov·I. Kholbaev·T. M. Muminov·B. Olimov·B. Yu. Sokolov·R. R. Usmanov
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Abstract

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.

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M. K. Aliev, G. R. Alimov, I. Kholbaev, T. M. Muminov, B. Olimov, B. Yu. Sokolov, R. R. Usmanov. 1998-09-28. ESR Spectrometry of High-Temperature Superconductors with Temperature-Modulation-Based Thermoregulation. https://arxiv.org/abs/cond-mat/9809372

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