%0 Journal Article %T Effects of the sintering temperature on the flux-pinning mechanism and the activation energy of malic-acid doped MgB2 %A Ghorbani, Shaban Reza %A M Bashi %A M S A Hossain %A G Peleckis %J پژوهش فیزیک ایران- Iranian Journal of Physics Research %@ 1682-6957 %D 2013