Dielectric and Magnetic Properties of Nanocrystal Barium Titanate, Strontium Titanate, and a Blended Nanoсomposite Based on Them

The temperature dependences of the dielectric constant and the intensity of the third harmonics are studied at temperatures of 100–470 K for barium titanate, strontium titanate, and a 0.5BaTiO 3 –0.5SrTiO 3 blended nanocomposite with an average crystallite size of around 100 nm. Magnetic hysteresis loops are obtained for BaTiO 3 and SrTiO 3 samples whose room-temperature spontaneous magnetizations are comparable in value. The effect thermal treatment has on the magnetic properties of nanocrystalline strontium titanate is discussed. Their spontaneous magnetization is shown to decline as a result of thermal treatment.