Paramagnetic Resonance of Mn^<++> Associated with Impurities in Alkali Chlorides

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The paramagnetic resonance absorption of Mn^<++> ions associated with the impurities of fluorine or divalent anions has been investigated in the single crystals of NaCl and LiCl. A resolved fine structure was observed in a "not quenched crystal" and it did not fade into a broad single line in contrast with the spectra of Mn^<++> ions which had been usually observed in alkali halides. The ground level splitting parameters have been determined in the spin Hamiltonian DS_1^2+E(S_2^2-S_3^2) as follows : D=(-420±1)・10^<-4> cm^<-1>, |E|=(65±1)・10^<-4>cm^<-1> for Mn^<++> -F^-, D=(-511±5)・10^<-4> cm^<-1>, |E|=(25±5)・10^<-4> cm^<-1> for Mn^<++> -X^<-->, a manganese divalent anion pair, in NaCl, and D=(-672±5)・10^<-4> cm^<-1>, |E|=(12±3)・10^<-4> cm^<-1> for Mn^<++> -X^<--> in LiCl, the proncipal axes of the spin Hamiltonian being in nearly agreement with the cubic axes of the crystal.
社団法人日本物理学会の論文
1961-04-05