Evolution of Novel Functions in Perovskite-related Oxides by Controlling Structures and the Chemical Bonds.
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概要
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Relationship between physical properties and structure or chemical bond in perovskite-related oxides has been briefly explained. Magnetic interactions are mainly depending on the local structures of B-O-B sequence and the electronic state of transition metal ions can be controlled by tuning the competing A-O and B-O bonds. Origin of the high temperature quantum paraelectricity in perovskite titanate was explained by the repulsion and Coulomb forces between Ti-O bonds. An example of the control of quantum paraelectricity to quantum ferroelectricity in SrTiO3 was introduced.Finally, ionic conduction in perovskite-related oxides was briefly reviewed.
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