Structurally ferroelectric SrMgF4

• Published in: Acta crystallographica. Section B, Structural science Vol. 58; no. 1; pp. 34 - 37
• Main Author: Abrahams, S. C.
• Format: Journal Article
• Language: English
• Published: 5 Abbey Square, Chester, Cheshire CH1 2HU, England International Union of Crystallography 01.02.2002; Blackwell
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Curie temperature; Dielectric, piezoelectric, ferroelectric and antiferroelectric materials; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Elements, oxides, nitrides, borides, carbides, chalcogenides, etc; Exact sciences and technology; ferroelectricity; Ferroelectricity and antiferroelectricity; Halides, chalcogenides and analogous compounds of group vb; Inorganic compounds; Phase transitions and curie point; Physics; spontaneous polarization; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Switching phenomena; Inorganic compounds; Curie point; Phase transformations; Strontium fluorides; Doping; Fluorides; Magnesium fluorides; Experimental study; Ferroelectricity; Ferroelectric materials; Cerium additions; Ferroelectric switching; Property structure relationship; Spontaneous polarization; Crystal structure
• ISSN: 0108-7681; 1600-5740
• DOI: 10.1107/S0108768101017062

The crystal structure of 0.06% Ce‐doped SrMgF4, strontium magnesium tetrafluoride, reported by Ishizawa et al. [(2001), Acta Cryst. C57, 784–786]  is shown to satisfy the structural criteria for ferroelectricity and to have a predicted Curie temperature Tc≃ l450 K. The estimated spontaneous polarization Ps≃ 11 × 10−2 C m−2 is consistent with classification as a two‐dimensional ferroelectric in which minor Δx and major Δy, Δz atomic coordinate component displacements are required for ferroelectric switching.