THEORY OF ANTIFERROELECTRIC CRYSTALS
THEORY OF ANTIFERROELECTRIC CRYSTALS
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DOI：
10.1103/physrev.82.729
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发表时间：
1951-01-01
期刊：
影响因子：
--
通讯作者：
KITTEL, C
中科院分区：
文献类型：
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作者：
KITTEL, C
反铁电态被定义为晶体中的离子线自发极化，但相邻的离子线在反平行方向上极化。在简单立方晶格中，反铁电态可能比铁电态更稳定。研究了一阶和二阶跃迁时反铁电居里点上下的介电常数。在这两种情况下，介电常数都不需要很高；但如果跃迁是二阶的，ε在居里点上是连续的。反铁电态不会是压电态。居里点附近的热异常与铁电体的性质和量级相同。在钛酸锶中发现的C （T+ θ）形式的磁化率变化并不表示反铁电性，这与反铁磁性中的相应情况不同。
An antiferroelectric state is defined as one in which lines of ions in the crystal are spontaneously polarized, but with neighboring lines polarized in antiparallel directions. In simple cubic lattices the antiferroelectric state is likely to be more stable than the ferroelectric state. The dielectric constant above and below the antiferroelectric curie point is investigated for both first-and second-order transitions. In either case the dielectric constant need not be very high; but if the transition is second order, ε is continuous across the Curie point. The antiferroelectric state will not be piezoelectric. The thermal anomaly near the Curie point will be of the same nature and magnitude as in ferroelectrics. A susceptibility variation of the form C (T+ θ) as found in strontium titanate is not indicative of antiferroelectricity, unlike the corresponding situation in antiferromagnetism.