Research for Ferroelectricity of Substances including Tetramethylammonium Radical in the Ammonium Sulfate Family.

硫铵中的铁电子学[（<NH_4>）<_2><SO_4>]包括四ramethylammonium [N（<CH_3>）<_4>]基，例如[N（<CH_3>）<_4>] <_2>Zn<Cl_4>， [N（<CH_3>）<_4>] <_2>Co<Cl_4>，[N（<CH_3>）<_4>] <_2>Cu<Br_4>，等等，是已知的。在另一只手上， ABX<Y_4>型铁电子，如RbLi<SO_4>和<NH_4>Li<SO_4>已被复制。因此，[N（<CH_3>）<_4>] <_2>X<Y_4>-和N（<CH_3>）<_4>BX<Y_4>- （B：单体cation， X<Y_4>：<SO_4>， Zn<Cl_4>，等等）的单晶体。类型材料已准备好并从这些物质中铁电的调查视点中测量了它们的物理性质。首先，我们报告了铁电的非正常化和铁电的热分解[N（<CH_3>）<_4>] <_2>Zn<Cl_4>和[N（<CH_3>）<_4>] <_2>Co<Cl_4>中的详细内容。两种晶体从化学公式N（ ）中获得的明显解决方案<CH_3>中获得<_4>了 ... More <SO_4> .发现其中一种生长在约40 ° C的是N（<CH_3>）<_4>H<SO_4>·<H_2>O，另一种生长在约90 ° C的是介于N（<CH_3>）<_4>H<SO_4>和N（<CH_3>）<_4>H<SO_4>·<H_2>O。这也发现了前表在-104 ° C和40 ° C之间的温度范围内的铁电。We cannot prepare perfect crystals of N（<CH_3>）<_4>H<SO_4>， yet.Usually， single crystals of [N（<CH_3>）<_4>] <_2>Ni <Cl_4>are grown by means of the evaporation method using an organic solvent。用N（<CH_3>）<_4>Cl ： Ni <Cl_2>= 2 ： 1在大约80 ° C的蒸发溶液中发现了N（<CH_3>）<_4>Ni<Cl_3>，并显示出在-106 ° C和160 ° C的分离阶段转换。在这项研究中，我们尝试准备了许多种类的材料晶体，包括氨硫基家族中四甲基氨基基的分子，并研究了它们的相位转换特征。在此之后，我们想进行研究，用于<Y_4>氨基硫酸盐家族中的B X型物质，特别是RbLi<SO_4>，并对这些材料的起源、腐蚀等进行分类。Less（低）

The ferroelectrics in the ammonium sulfate [( <NH_4> ) <_2> <SO_4> ] family substances including tetramethylammonium [N( <CH_3> ) <_4> ] radical, such as [N( <CH_3> ) <_4> ] <_2> Zn <Cl_4> , [N( <CH_3> ) <_4> ] <_2> Co <Cl_4> ,[N( <CH_3> ) <_4> ] <_2> Cu <Br_4> , etc., are known. On the other hand, ABX <Y_4> -type ferroelectrics like RbLi <SO_4> and <NH_4> Li <SO_4> have been reproted. Therefore, single crystals of [N( <CH_3> ) <_4> ] <_2> X <Y_4> - and N( <CH_3> ) <_4> BX <Y_4> - (B:monovalent cation, X <Y_4> : <SO_4> , Zn <Cl_4> , etc.) type materials were prepared and their physical properties were measured from the view point of investigation of ferroelectricity in these substances.First, we reported the dielectric properties and the features of thermal anomaly and thermal dilatation of ferroelectric [N( <CH_3> ) <_4> ] <_2> Zn <Cl_4> and [N( <CH_3> ) <_4> ] <_2> Co <Cl_4> in detail.Two kinds of crystals were obtained from the aqueous solution of chemical formula N( <CH_3> ) <_4> H … More <SO_4> . It was found that one of them grown at about 40 ゜C is N( <CH_3> ) <_4> H <SO_4> ・ <H_2> O and the other grown at about 90 ゜C is intermediate material between N( <CH_3> ) <_4> H <SO_4> and N( <CH_3> ) <_4> H <SO_4> ・ <H_2> O. It was also found that the former shows ferroelectricity in a temperature range between -104 ゜C and about 40 ゜C. We cannot prepare perfect crystals of N( <CH_3> ) <_4> H <SO_4> , yet.Usually, single crystals of [N( <CH_3> ) <_4> ] <_2> Ni <Cl_4> are grown by means of the evaporation method using an organic solvent. Single crystals prepared by the evaporation of aqueous solution of N( <CH_3> ) <_4> Cl : Ni <Cl_2> = 2 : 1 mixture at about 80 ゜C were found to be N( <CH_3> ) <_4> Ni <Cl_3> and to show distinct phase transitions at -106 ゜C and 160 ゜C.In this research, we tried to prepare many kinds of crystals of materials including tetramethylammonium radical in the ammonium sulfate family, and studied on the feature of their phase transitions. Hereafter, we want to carry out the study for the A B X <Y_4> -type substances in the ammonium sulfate family, especially such as RbLi <SO_4> , and to clarifiy the origins of the dielectric properties, the incommensuration, etc. of these materials. Less