Laser patterning and magnetic properties of perovskite-type crystals on the glass surface

The laser-induced crystallization technique has been applied to 10La2O3-35SrO-25MnO2-30B2O3 glass (mol%) in order to examine the possibility of the formation and morphology control of perovskite-type La1−xSrxMnO3 crystals on the glass surface. It is found from X-ray diffraction analyses that La0.7Sr0.3MnO3 crystals are formed in the sample obtained by continuous wave Y b:Y V O4 fiber laser (wavelength: 1080 nm) irradiations (power: 350 mW, scanning speed: 10 μm/s). La0.7Sr0.3MnO3 manganites in the laser-irradiated samples are proposed to be ferromagnetic crystals having a Curie temperature of ∼315 K from magnetization measurements and the Arrott plot. The surface morphology of laser-irradiated parts is not smooth, and La0.7Sr0.3MnO3 crystals are present randomly without any orientations. It is clarified that Mn4+ ions in the glass act as suitable transition metal ions for the laser-induced crystallization.