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Electron Paramagnetic Resonance Spectra Observed in Single Crystals of YBa 2 Cu 3 O 7–δ
Author(s) -
Yu C.,
Lai C.,
Marshall S. A.,
YoderShort D. R.,
Zhang Y. N.
Publication year - 1990
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221570138
Subject(s) - electron paramagnetic resonance , impurity , superconductivity , single crystal , paramagnetism , materials science , absorption spectroscopy , spectral line , penetration depth , analytical chemistry (journal) , crystal (programming language) , spectroscopy , nuclear magnetic resonance , condensed matter physics , chemistry , crystallography , physics , optics , programming language , organic chemistry , chromatography , astronomy , quantum mechanics , computer science
An electron paramagnetic resonance absorption study is conducted on four separately prepared single crystal groups of the superconductor YBa 2 Cu 3 O 7–δ , each group consisting of from four to six crystalline platelets. This investigation confirms conclusions reached by other regarding the EPR silence of this superconducting oxide while demonstrating that EPR spectroscopy can be used to determine certain properties of superconducting oxides. Such determinations include detection of paramagnetic impurity phases, noninvasive means for determining T c , and estimating the depth of penetration of a microwave radiation field in these materials. Some comments are provided on the nonresonant, zero field absorption in both, the powders and single crystal platelets.