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Absolute calibration of microwave loss in ESR spectrometers
Author(s) -
Glarum Sivert H.,
Ramirez Arthur P.,
Haddon Robert C.
Publication year - 1994
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.19940060112
Subject(s) - microwave , materials science , spectrometer , calibration , voltmeter , superconductivity , characterization (materials science) , microwave power , microwave cavity , analytical chemistry (journal) , magnetic field , optics , power (physics) , physics , nanotechnology , condensed matter physics , chemistry , chromatography , quantum mechanics
Studies of field‐dependent microwave losses are useful for the detection and characterization of superconducting materials. The measurements are made in a conventional ESR spectrometer, but until now the data interpretation has been mainly qualitative. A calibration procedure using just a frequency counter, DC voltmeter, and ball bearing is decribed. This allows a quantitative determination of magnetic losses to ∼ 5% accuracy without the need to determine the cavity Q , power level, or field strength.