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Type: Artigo de evento
Title: High Coercivity In A New Molecular Iron-based Magnet
Author: Vaz M.G.F.
Ardisson J.D.
Speziali N.L.
Souza G.P.
Stumpf H.O.
Knobel M.
Macedo W.A.A.
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.
Rights: fechado
Identifier DOI: 10.1016/S0277-5387(01)00630-1
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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