Preparation, and magnetic and electromagnetic properties of La-doped strontium ferrite films

► Synthesizing the precursor of SrLaxFe12−xO19 films by sol-gel method. ► The doping of lanthanum enables excellent magnetic properties of Sr-ferrite films. ► Preparing La-doped Sr-ferrite films with nanometer scale crystal grains. ► Great interest for magnetic recording material and microwave absorbers.