supports received from the National Science Council(99B0320);the National Center for Theoretical Sciences(NCTS),South Taiwan.
A search was made for possible half-metallic(HM)antiferromagnet(AFM)in all the(C_(2)^(92)=406)double perovskites structures of Sr2BB′O6 where BB′pairs are any combination of 3d,4d or 5d transition elements with the ...