EPR Studies of the Low-Tempehature Phase Transitions in LiKSO₄ by Cu²⁺ Ions

Abstract

Electron paramagnetic resonance (EPR) spectra of Cu²⁺ doped lithium potassium sulphate (LP3) have been studied at different temperatures. The spin-Hamiltonian g and A parameters have been evaluated. Phase transitions in LP3 were observed at low temperature. The measured g-values indicate a rhombic field for Cu²⁺ in the lattice at the temperature range 300–215 K. Between 215 K and 123 K an orthorhombic field suggested. The bonding parameter (∞²), Fermi-contact term (K) and the free ion dipolar term (P) are evaluated using the principal g and A values. The ground state were runction for Cu²⁺ ion in (LPS) is determined.

∗Present address: Physics Department, Faculty of Science, Sana¹ a University, Sana¹ a P.O. Box 15764 Yemen.

Notes

∗Present address: Physics Department, Faculty of Science, Sana¹ a University, Sana¹ a P.O. Box 15764 Yemen.