Synthesis of transparent magnetic particle/organic hybrid film using iron-organics

A transparent magnetic particle/organic film was synthesized from an iron-o rganic compound. Iron(III) 3-allylacetylacetonate (IAA) was polymerized fol lowed by in situ hydrolysis yielding an iron oxide particle/oligomer hybrid . The sizes of magnetic particles were dependent upon the hydrolysis condit ions of the IAA oligomers. A nanometer-sized ferrimagnetic iron oxide parti cle/oligomer hybrid showed a magnetization curve with no coercive force at 300 K and that with H-c of 200 Oe at 4.2 K, respectively. The magnetization versus HIT curves at 300 and 77 K were superimposed on each other and sati sfied the Langevin equation. The transparent hybrid film showed a magnetiza tion curve at room temperature. The absorption spectrum of the film was shi fted to higher energy by 0.14 eV compared with that of bulk magnetite. The absorption edge of the film was blue-shifted.