PHYSICAL PROBLEMS OF CAPACITOR MATERIALS WITH THE PYROCHLORE STRUCTURE

The oxides A(2)B(2)O(7) and A(2)B(2)O(6) With the pyrochlore structure and nonferroelectric phase transitions are suitable materials for cap acitors. Their behavior, including their dielectric behavior, can be e xplained on the assumption that they are improper antiferroelectrics. An approximate calculation gives a reasonable order of magnitude for t he parameters appearing in the formulas. This can be considered as a c onfirmation of the correctness of the ideas employed. (C) 1997 America n Institute of Physics.