Abstract
The ferroelectric to paraelectric phase transition is modeled as an order-disorder process with lithium atoms jumping between their normal sites and adjacent interstitial sites. This lithium jump corresponds to lithium Frenkel defect formation. At temperatures significantly away from the Curie temperature it is found that the lithium Frenkel energy is about 0.165 eV. As the temperature approaches Tc, disorder abounds and eventually the lithiums become equally distributed between the two available sites. The previously reported spontaneous polarization, Ps, data for lithium tantalate are analyzed in terms of this order-disorder model. The slope of P2 s with temperature is directly in line with the model's prediction.
| Original language | English |
|---|---|
| Pages (from-to) | 2485-2488 |
| Number of pages | 4 |
| Journal | Journal of Applied Physics |
| Volume | 69 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 1991 |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
Cite this
Determination of the lithium Frenkel energy in lithium tantalate. / Birnie, Dunbar P.
In: Journal of Applied Physics, Vol. 69, No. 4, 1991, p. 2485-2488.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Determination of the lithium Frenkel energy in lithium tantalate
AU - Birnie, Dunbar P
PY - 1991
Y1 - 1991
N2 - The ferroelectric to paraelectric phase transition is modeled as an order-disorder process with lithium atoms jumping between their normal sites and adjacent interstitial sites. This lithium jump corresponds to lithium Frenkel defect formation. At temperatures significantly away from the Curie temperature it is found that the lithium Frenkel energy is about 0.165 eV. As the temperature approaches Tc, disorder abounds and eventually the lithiums become equally distributed between the two available sites. The previously reported spontaneous polarization, Ps, data for lithium tantalate are analyzed in terms of this order-disorder model. The slope of P2 s with temperature is directly in line with the model's prediction.
AB - The ferroelectric to paraelectric phase transition is modeled as an order-disorder process with lithium atoms jumping between their normal sites and adjacent interstitial sites. This lithium jump corresponds to lithium Frenkel defect formation. At temperatures significantly away from the Curie temperature it is found that the lithium Frenkel energy is about 0.165 eV. As the temperature approaches Tc, disorder abounds and eventually the lithiums become equally distributed between the two available sites. The previously reported spontaneous polarization, Ps, data for lithium tantalate are analyzed in terms of this order-disorder model. The slope of P2 s with temperature is directly in line with the model's prediction.
UR - http://www.scopus.com/inward/record.url?scp=3042891339&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=3042891339&partnerID=8YFLogxK
U2 - 10.1063/1.348686
DO - 10.1063/1.348686
M3 - Article
AN - SCOPUS:3042891339
VL - 69
SP - 2485
EP - 2488
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 4
ER -