SrFe(12)O(19) (SFO)/Ni(0.5)Zn(0.5)Fe(2)O(4) (NZFO) composite ferrite nanofibers with diameters about 120 nm have been prepared by the electrospinning and calcination process. The SFO/NZFO composite ferrites are formed after calcined at 700 degrees C for 2 h and the composite nanofibers with various mass ratios obtained at 900 degrees C are fabricated from NZFO grains about 16-40 nm and SFO grains of 19-45 nm with a uniform phase distribution. With the SFO ferrite content increasing, the coercivity (H(c)) and remanence (M(r)) for the composite ferrite nanofibers initially increase, reaching maximum values of 379.8 kA/m (297 K) and 242.2 kA/m (7710, 39.1 Am(2)/kg (297 K) and 53.5 Am(2)/kg (77 K), respectively, at a mass ratio (SFO:NZFO) of 4, and then show a reduction tendency with a further increase of the mass ratio. This enhancement in magnetic properties is attributed to the competition of the exchange-coupling interaction and the dipolar interaction in the composite nanofibers. (C) 2011 Elsevier Inc. All rights reserved.