The structure and magnetic properties of molecule-based magnet nanoparticles K<sub>x</sub>V<sub>y</sub>[Cr(CN)<sub>6</sub>]<sub>z</sub>.nH<sub>2</sub>O
Phung, Kim Phu; Le, Van Hong; Nguyen, Van Minh; Phung, Kim Phu; Center for Nanoscience and Technology, Hanoi National University of Education 136 Xuan Thuy Road, Hanoi, Vietnam; Le, Van Hong; Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District, Hanoi, Vietnam; Nguyen, Van Minh; Center for Nanoscience and Technology, Hanoi National University of Education 136 Xuan Thuy Road, Hanoi, Vietnam
Журнал:
Advances in Natural Sciences: Nanoscience and Nanotechnology
Дата:
2011-12-01
Аннотация:
We have synthesized K<sub>x</sub>V<sub>y</sub>[Cr(CN)<sub>6</sub>]<sub>z</sub>. nH<sub>2</sub>O molecule-based magnet nanoparticles belonging to the Prussian blue (PB) family of compounds. The synthesized samples were characterized by infrared spectroscopy (IR), Raman spectroscopy, UV–Vis spectroscopy, differential thermal analysis (DTA) and thermogravimetric analysis (TGA). The crystal structure was refined from the x-ray powder diffraction profile by the Rietveld method. The samples are cubic, Fm3m space group with lattice parameter a=1.045 nm. The magnetic properties are determined from thermal variation of the magnetization and hysteresis loop. The most interesting result is the successful preparation of K<sub>x</sub>V<sub>y</sub>[Cr(CN)<sub>6</sub>]<sub>z</sub>. nH<sub>2</sub>O crystal Prussian blue nanomaterial which had Curie temperature (T<sub>c</sub>) approaching room temperature.
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