Electron paramagnetic resonance study of Mn²⁺ doped Mg(ClO₄)₂∙6H₂O

Abstract

Electron paramagnetic resonance of Mn 2+ doped Mg(ClO 4 ) 2 ∙6H 2 O crystals has been studied from room temperature (300 K) down to liquid nitrogen temperature at X-band. The room temperature results show three inequivalent sites for Mn 2+ in the crystal. Hyperfine forbidden transitions are observed when the magnetic field is not oriented along one of the principal axes. Two structural phase transitions have been observed at temperatures of 272 ± 1 and 103 ± 1 K, respectively. The transition occurring at 272 ± 1 K has been observed for the first time. The transition occurring at 103 ± 1 K is the one detected earlier through Mössbauer studies.