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ESR Spectra of the Molten MnCl2–KCl System

Paramagnetic resonance data are presented for the molten MnCl2–KCl system containing 0.01–100 mol% of MnCl2. For The specimens containing MnCl2 less than 0.5 mol%, the hyperfine structure with A=75–77 gauss is observed. For the melts with higher MnCl2 concentration, a single Lorentz-type resonance line is observed. The linewidth increases due to magnetic dipolar interaction in the concentration range 10–30 mol% and it decreases due to exchange interaction in the range 30∼100 mol%. It is found that the electron exchange between Mn2+ ions in this molten system is possible through covalent bridge Mn2+–Cl-–Mn2+.