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|Type:||Artigo de evento|
|Title:||High Coercivity In A New Molecular Iron-based Magnet|
|Abstract:||A new molecule-based magnet containing Fe(II), Fe(III) and Cu(opba)2- (opba = ortho-phenylenebis(oxamato)) was synthesized. The samples were characterized by infrared spectroscopy, elemental analysis, atomic absorption, macroscopic magnetometry, X-ray diffraction, and 57Fe Mössbauer spectroscopy. Magnetic measurements show that the compound presents a transition temperature below 15 K and a high coercivity, around 6.3 kOe at 4.2 K. At room temperature, the Mössbauer spectrum is dominated by a broad doublet characteristic of Fe(II), and a small fraction of Fe(III) ions is also identified. At 4.2 K, the spectrum shows clear magnetic splitting. © 2001 Elsevier Science Ltd.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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