Electron Spin Resonance in Sr_<0.60>Ca_<0.40>CuO_2

概要

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F,SR measurements have been made on a powder sample of Sr....Ca....,Cu0. (theSrCu0z structure) at room and liquid nitrogen temperatures. Its ESR spectrum con-sists of seven hyperfine lines associated witla a pair of identical Cu ions. The hyperfineterm in the spin Hamiltonian takes the form A S' (I. 87.), w'laere A is a layperfine con-slant; S the total electronic spin of a pair of Cu tons; and I., 72 tlte nuclear spins of Cuions. The spectroscopic splitting factor g=2.1S, and IA l =72X 10 'cm-'. The spec-trum indicates that a fine structure contributes to broadening hyperfiuae Ji?xes. At liq-uid nitrogen temperature, microwave absccrption was detected over the completerange of a magnetic field sweep, being accompanied with the ESR absorption due toCu ion pairs.Sr-Ca-Cu-O, ESR, hyperfine structure, Cu ion pair, experiment
社団法人日本物理学会の論文
1992-09-15