The magnetic properties of pulsed laser deposited Co-Zn ferrite [Co1-xZnxFe2O4 (0.1 <= x <= 0.7)] nanocry-stalline thin films have been investigated. The films were deposited on amorphous quartz substrate. The observed magnetic properties of the films depend on the deposition temperature (T-S), the annealing temperature (T-A) and the Zn content (x). A magnetization value higher than bulk was observed in a room temperature deposited Co rich (x = 0.1) Co-Zn ferrite thin films, when the films were ex-situ annealed at T-A = 750 degrees C. On the other hand, in Zn rich (x = 0.7) Co-Zn ferrite, a magnetization value higher than bulk (x = 0.7) was obtained in a film deposited at T-S = 750 degrees C. The unusual magnetization values are explained on the basis of grain growth and the cation distribution in thin films. (C) 2017 Elsevier B.V. All rights reserved.