Chiang, T.W.T.W.ChiangChiu, Y.H.Y.H.ChiuSSU-YEN HUANGLee, S.F.S.F.LeeLiang, J.J.J.J.LiangJaffr?s, H.H.Jaffr?sGeorge, J.M.J.M.GeorgeLemaitre, A.A.Lemaitre2018-09-102018-09-10200900218979http://www.scopus.com/inward/record.url?eid=2-s2.0-65249148698&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/347784Point-contact Andreev reflection measurements on Ga0.94 Mn0.06 As were investigated using Pb tips. The observed conductance versus voltage spectra exhibited behaviors which were described by the modified Blonder-Tinkham- Klapwijk model but with significant broadening. We propose a model by introducing a spreading resistance and compare with an existing model which included effective temperature as a parameter. In as-grown/annealed Ga0.94 Mn0.06 As samples, we extracted conduction electron spin polarization of 76%/74% from our model, instead of 90%/82% from the one with the effective temperature. © 2009 American Institute of Physics.[SDGs]SDG7Andreev reflections; Conduction electrons; Effective temperatures; Spreading resistances; Extraction; Lead; Spin dynamics; Point contactsjournal article10.1063/1.30596052-s2.0-65249148698WOS:000266633500434