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Co-doped MnxGe1–x (Co–MnxGe1–x) (x = 0.02, 0.1, 0.3) films had been deposited at different sputtering powers on silicon (100) substrates using direct current (DC) and radio frequency (RF) magnetron co-sputtering. The films were characterized by X-ray diffraction (XRD), energy disperse X-ray (EDX), scanning electron microscope (SEM) and vibrating sample magnetometer (VSM). It was shown that the samples with low Mn content had polycrystalline cubic structure with an (220)-preferential orientation. The roughness of samples enhanced with the increase of Co content. In addition, we found that introducing Co can improve the ferromagnetism of the samples when sputtering power is 20 W. At the same time, the Co–MnxGe1–x (80W) films have a stronger ferromagnetic property due to the introduction of substantial Co atoms. [ABSTRACT FROM AUTHOR]

Zn(NbO3)2 doped Sr0.98Ca0.02TiO3 (SCT-xZN) paraelectric ceramics have been obtained by the traditional electroceramic processing. Phase structures and doping effects were investigated by using XRD and Raman. Surface morphology was observed by SEM to evaluate grain growth. The P-E curves were measured and employed to calculate the energy storage density and efficiency. The doping effects on dielectric properties such as permittivity, dielectric loss and breakdown strength were also measured and discussed. [ABSTRACT FROM AUTHOR]

In this study, various amount of SnO2was doped into Ba0.5Sr0.5TiO3ceramics. The effects of SnO2doping on phases, densities and microstructures, energy storage densities of prepared BST ceramics were studied. XRD patterns indicated that Sn4+has entered the BST lattice. SnO2also showed the effect to inhibit the grain growth. When SnO2content was 0.05 mol%, the energy storage efficiency can be greatly improved. [ABSTRACT FROM PUBLISHER]

BaTiO3ceramics were fabricated by microwave sintering in very short soaking time. The phases, microstructures, and dielectric constants were studied. Elevated sintering temperatures resulted in larger gain size, higher Tc, and larger c/a. The dielectric constant of sample sintered at 1200°C could reach 3315. Faster heating ramps may improve both dielectric constant and dielectric loss. [ABSTRACT FROM PUBLISHER]

Barium titanate and alumina mixed (from 0.5 to 5 vol.%) barium titanate composite ceramics incorporating nano-sized powders were prepared by the conventional electroceramic process. With the increase of alumina addition content, the densities of the ceramics gradually decreased from 5.67 g/cm3to 5.3 g/cm3, the hardness was enhanced, and the phase transition from tetragonal to cubic became disperse. Comparable dielectric and piezoelectric properties of barium titanate ceramics could be obtained when the alumina addition content was no more than 1 vol.%. [ABSTRACT FROM AUTHOR]