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

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

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