Ferrielectricity in a metal-organic ferroelectric tris-sarcosine calcium chloride
Abstract
We report a paradigm of ferrielectricity in a single-phase crystal, tris-sarcosine calcium chloride [TSCC; (CH3NHCH2COOH)3CaCl2]. Ferrielectricity is well known in smectic liquid crystals but almost unknown in true crystalline solids. C. F. Pulvari [Ferrielectricity, Phys. Rev. 120 , 1670 (1960)] reported it in 1960 in mixtures of ferroelectrics and antiferroelectrics (AFEs), but only at high fields. Tris-sarcosine calcium chloride exhibits a second-order displacive phase transition near Tc=130K that can be lowered to a quantum critical point at 0 K via Br or I substitution and phases previously predicted to be AFE at high pressure and low temperatures. Unusually, the size of the primitive unit cell does not increase in the so-called AFE phase. We measure hysteresis loops and polarization below T=64K and provide clear Raman evidence for this paraelectric-ferrielectric transition.
Citation
Scott , J F , Morrison , F D , Slawin , A M Z , Clulow , R , Gherson , A , Bumstead , A , Gardner , J , Capelli , S , Probert , M , Sahoo , S , Young , J , Katiyar , R & Salje , E 2017 , ' Ferrielectricity in a metal-organic ferroelectric tris-sarcosine calcium chloride ' , Physical Review. B, Condensed matter and materials physics , vol. 95 , no. 9 , 094119 . https://doi.org/10.1103/PhysRevB.95.094119
Publication
Physical Review. B, Condensed matter and materials physics
Status
Peer reviewed
ISSN
1098-0121Type
Journal article
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