Pure CoCr2-xFexO4 nanoparticles synthesized through conventional coprecipitation technique show particle size distribution in the range of 16-20 and 6-10 nm for x = 0.1 and 0.2 respectively. Magnetic and specific heat measurements show an enhancement of paramagnetic to collinear ferrimagnetic transition temperature, T-c from 100 to 110 K and to a short range non-collinear spiral ordering, T-s from 18 to 36 K with increasing x from 0.1 to 0.2 respectively. In addition, a strong disagreement between the paramagnetic moment obtained from the fitting of x(-1) = T/C + 1/xo - b/(T - theta) and ferrimagnetic moment measured from the M vs. H loop at 10 K corroborates the nonsaturation behavior of magnetization at 50-100 kOe field and an order of magnitude higher coercivity (H-c). The enhancement of Tc and T-s, with increasing Fe concentration is attributed to an intrinsic change in non-collinear to collinear spin structure and strong J(A-B) interaction. (C) 2014 Elsevier Ltd. All rights reserved.