Electron Spin Resonance of Mn^<2+> in Lead Titanate

概要

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The electron spin resonance (ESR) study has been made for cubic and tetragonal lead titanate (PbTiO_3) doped with manganese ion. The signals were observed in the ceramics fired in nitrogen atmosphere, whereas both for the ceramics fired in air and for single crystals any ESR signal due to substitutional Mn^<2+> was not observed. Mn^<2+> PbTiO_3 is considered to be located at the titanium site in the unit cell. The spin Hamiltonian parameters obtained are as follows: in tetragonal phase g ⊥ =2.084±0.002, D=+(502±4)×10^<-4>cm^<-1>, a=+(43±2)×10^<-4>, A_x(=A_y)=-(82±1.5)×10^<-4>cm^<-1>, in cubic phase g=1.996±0.002, A_x(=A_y=A_x)=-(79.8±0.5)×10^<-4>cm^<-1>. The ratio between the values of Din PbTiO_3 and BaTiO_3 is in rough agreement with the ratio between the strengths of their axial crystalline field.
社団法人日本物理学会の論文
1969-08-05