Crystal structure of multiferroic KNi_1-xCo_xPO4 (x=0,0.1,0.2,0.3,0.4,0.5,1.0)

The proposal falls within the general research area of multifunctional multiferroic materials, which has received great attention in both fundamental research and practical applications. One promising class of multiferroics materials can be realized in the KNi_1-xCo_xPO4 family. In this regard, the origin of the series of temperature-induced phase transitions high temperatures are also poorly understood. Uncovering the crystal structure is crucial for understanding the mechanisms behind the magnetoelectric effect in the candidate material. Hence, we propose to use powder x-ray diffraction to determine if the high temperature phase transitions of the compound at various doping levels (x = 0, 0.1 ,0.2 ,0.3, 0.4, 0.5, 1.0) are accompanied by structural changes.