| Autor: |
Vaz, M.G.F, Ardisson, J.D, Speziali, N.L, Souza, G.P, Stumpf, H.O, Knobel, M, Macedo, W.A.A |
| Zdroj: |
Polyhedron; 2001, Vol. 20 p1431-1434, 4p |
| Abstrakt: |
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 15K and a high coercivity, around 6.3kOe at 4.2K. 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 4.2K, the spectrum shows clear magnetic splitting. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
Full Text from ScienceDirect