Dielectric properties of monoclinic KD2P04
- 1 February 1975
- journal article
- research article
- Published by Wiley in Physica Status Solidi (b)
- Vol. 67 (2) , 689-694
- https://doi.org/10.1002/pssb.2220670231
Abstract
Highly deuterated KD2PO4 which is monoclinic at room temperature, undergoes a dielectric phase transition between T = 0 °C (on heating) and Tcll = −25 °C (on cooling). At lower temperatures there is another dielectric anomaly around TcI = −60 °0. The “lower” transition Tci occurs approximately at the same temperature as the tetragonal‐ orthorhombic ferroelectric phase transition, whereas the “higher” transition TCII is similar in character to the tetragonal‐monoclinic “high temperature” transition in “normal” KH2PO4. A tentative model for the phase diagram of KH2PO4 and the tetragonal‐mono‐clinic transition is discussed.Keywords
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