Pyroelectric, dielectric, piezoelectric and electrooptic properties of monoclinic nitrilotriacetic acid N(CH2COOH)3 and orthorhombic X2Zr[N(CH2COO)3]2 · 2 H2O (X = K, Rb, Cs)

✍ Scribed by Dr. U. Richter; Prof. Dr. S. Haussühl

• Publisher: John Wiley and Sons
• Year: 1987
• Tongue: English
• Weight: 327 KB
• Volume: 22
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.2170220417

✦ Synopsis

Large single crystals of nionoclinic nitrilotriacetic acid, N(CH,COOH),, NTA, and of orthorhornbic isotypic X,Zr[N(CH,COO),], . 2 H,O (X = K, Rb, Cs) have been grown from aqueous solutions. They possess optical quality and have dimensions up to 10 mm and larger. The complete dielectric, piezoelectric and electrooptic tensors have been determined. The riiaxinium longitudinal and transversal piezoelectric effects exceed those of a-quartz by roughly a factor 11. The pyroelectric effects in NTA and in the X,Zr-salts (X = K, Ztb, Cs) are by about a factor 3 larger than that in tourmaline, whereas the maxiinuni electrooptic effects amount only to about half of that in KH,PO,. Qualitative measurements of the nonlinear optical properties by the aid of a SHG powder test and on single crystals revealed effects comparable with those observed in LilO,. Phase matching is possible in these compounds. Replacing X by NH, or T1 also acentric crystals are obtained with strong polar properties.