High-quality FeCo and FeCoV thin films with Fe concentrations between 32 and 52 atom% were electrodeposited from a sulfamate solution. The grain size of the films was about 200 nm. The thickness of the films was up to several hundred micrometers. The magnetic properties of these films are characteristic of bulk FeCo alloys. The addition of small amounts of vanadium eliminated film cracking but slightly decreased the magnetic permeability. (C) 2003 The Electrochemical Society.