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Studies in Applied Mathematics

Resonance in a Quantum Chain

Eytan Barouch

Published Apr 1, 1977• 1 citation
Publisher

Abstract

A resonance of a magnetic impurity with a quantum spin‐chain is studied. A Fresnel diffraction pattern is found.
DOI
10.1002/sapm1977562169

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Anomalous polarization characteristics of magnetic resonance in CuGeO3 doped with 2% of Co impurity are reported. For the Faraday geometry this mode is damped for the microwave field Bw aligned along a certain crystallographic direction showing that the character of magnetic oscillation differs from the standard spin precession. The observed resonance coexists with the ESR on Cu2+ chains and argued not to be caused by "impurity" EPR, as previously claimed, but to correspond to a previously unknown collective mode of magnetic oscillations in S=1/2 AF quantum spin chain.