EPR of Cu(II) in sarcosine cadmium chloride: probe into dopant site - symmetry and copper-sarcosine interaction

The electron paramagnetic resonance spectra of Cu(IT) doped sarcosine cadmi um chloride single crystals have been investigated at room temperature. Exp erimental results reveal that the Cu(II) ion enters the lattice interstitia lly. The observed superhyperfine lines indicate the superposition of two se ts of quintet structure with interaction of nitrogen atoms and the two isot opes of copper. The spin Hamiltonian parameters are evaluated by Schonland method and the electric field symmetry around the copper ion is rhombic. An admixture of d(z)(2) orbital with the d(x2-y2) ground state is observed. E valuation of MO coefficients reveals that the in-plane interaction between copper and nitrogen is strong in this lattice. (C) 2000 Elsevier Science B. V. All rights reserved.