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Single crystal EPR of Cu(II) doped Cd(C5H5NO)6(BF4)2--an example of reduced metal hyperfine coupling constant
A Milton Franklin Benial1, V Ramakrishnan, R Murugesan
1Laser Laboratory, Microprocessor and Computer Department, School of Physics, Madurai Kamaraj University, Tamil Nadu, India.
Abstract:
Electron paramagnetic resonance (EPR) studies have been carried out on Cu(II) doped Cd(C5H5NO)6(BF4)2 in single crystal and powder forms at 300 K. Angular variation of hyperfine structure lines shows the presence of two magnetic sites, indicating possible twinning in the Cd lattice. From the mean values of two sites, the angular variation plot is fitted to an orthorhombic spin Hamiltonian. The observed orthorhombic g values and the very low A11 value ([A11] = 107.8 x 10(-4) cm(-1)) are unusual for a hexakis coordinated system. This unique behavior is explicable in terms of the static Jahn-Teller (JT) effect.
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