| 摘要 |
A variable-capacitance element the capacitance value of which can be freely set to a desired value corresponding to a write voltage, and, once set, is maintained also after the write voltage is removed. The invention also provides a method for adjusting a variable-capacitance element, a variable-capacitance device and an electronic apparatus. According to the invention, a variable-capacitance element 100 includes a pair of electrodes 101 and 102 formed with a ferroelectric material layer 103 in between. The variable-capacitance element is adjusted by the steps of: maximizing or minimizing the sum of electric dipole moments of the ferroelectric material layer 103; and writing a desired capacitance to the variable-capacitance element 100 by applying a desired write voltage V between the electrodes 101 and 102 of the variable-capacitance element 100 the sum of electric dipole moments of the ferroelectric material layer 103 of which has been maximized or minimized.
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