The Relationship Between The Transition Voltage Of The I-V Curve Of The Ferroelectrics And The Coercive Field Of The P-V Hysteretic Curve

The relationship between the transition voltage of the I-V curve of the ferroelectrics and the coercive field of the P-V hysteretic curve is calculated. The first mathematical analysis to explain the relation between the transition voltage V-t and the coercive voltage V-c is obtained. The origin of the interrelation between the transition voltage of the I-V curve and the coercive field is that the height of the boundary barrier is inversely proportional to the effective dielectric constant of the near-boundary region, which is dependent on a derivative of polarization on the electric field, partial derivativeP/partial derivativeE. The term xi(eV(t)) plus the term (en(b)(2)delta/dN(d)P(s))(eV(c)) equals a constant. V-t is the function of E-g, P-s, V-c. and E. There is a linear relation between V-c and V-t. This relationship will induce the matchable relations between the I-V curve and the E-P loop. As long as the Vc of the V-P loop exists, the correspondent Vt of I-V curve will certainly exist. It will be the foundation of a new ferroelectric memory, which operates by the I-V characteristics. These relations are the conditions that can enable nonvolatile memory and nondestructive readout. (C) 2002 Published by Elsevier Science B.V.