Phase transitions and ferroelectricity in very thin films: single- versus multidomain state

Details Phase transitions and ferroelectricity in very thin films: single- versus multidomain state Phase transitions and ferroelectricity in very thin films: single- versus multidomain state

2006-01-21

arxiv.org/abs/cond-mat/0601484v2

Physics

Condensed Matter

Materials Science

5 pages, 1 figure; (v2) added a discussion of a tilt of hysteresis curves in thin FE films and a few recent references

Scientific paper

We discuss ferroelectric phase transitions into single- and multidomain states in very thin films using continuous theory. It is shown that in nearly cubic ferroelectrics the domain state may survive down to atomic film thicknesses, unlike the single domain state, which is almost always unstable or metastable. This conclusion is valid almost irrespective of the nature of electrodes (metallic or semiconducting) and whether or not the screening carriers may be present in the ferroelectric itself.

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