SCREEN-PRINTED LA2 3SR1/3MNO3 THICK-FILMS ON ALUMINA SUBSTRATES/

We report here on the preparation of La2/3Sr1/3MnO3 magnetoresistive t hick films on polycrystalline Al2O3 substates by using the screen prin ting technique. It is shown that films can be obtained using high temp erature sintering. While there is a reacted layer, this improves adhes ion and is not too troublesome if the films are made thick enough. It is shown that PbO-B2O3-SiO2 glass additives allow sintering at lower t emperatures and can be used to improve the mechanical stress of the fi lms. However, it is found that glass concentrations large enough to si gnificantly improve the film adherence result in a weak low field magn etoresistance probably because grains are coated with high resistivity material. Strategies to overcome these difficulties are discussed.