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Manganese oxides with a perovskite-type Re_(1-x)D_xMnO_3(Re:heavy rare-earth elements,D:divalent alkali metal)structure have attracted interest because of the complex interaction between their electrons,lattices,and spins[1-5].Generally,manganese oxides with the structure Re_(1-x)D_xMnO_3 have special properties.For example,the half-metallic manganites,such as La_(2/3)Sr_(1/3)MnO_3 and La_(2/3)Ca_(1/3)MnO_3,wherein the conduction electrons are completely spin polarized,exhibit
Manganese oxides with a perovskite-type Re_ (1-x) D_xMnO_3 (Re: heavy rare-earth elements, D: divalent alkali metal) structure have attracted interest because of the complex interaction between their electrons, lattices, and spins [1-5 ] .Generally, manganese oxides with the structure Re_ (1-x) D_xMnO_3 have special properties. For example, the half-metallic manganites such as La_ (2/3) Sr_ (1/3) MnO_3 and La_ (2/3 ) Ca_ (1/3) MnO_3, wherein the conduction electrons are completely spin polarized, exhibit