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Your search keyword '"Burriel, Ramon"' showing total 3 results
Start Over Author "Burriel, Ramon" Topic chemistry
3 results on '"Burriel, Ramon"'

1. Magnetic excitations in polyoxometalate clusters observed by inelastic neutron scattering: evidence for anisotropic ferromagnetic exchange interactions in the tetrameric cobalt (II) cluster [Co4(H2O)2(PW9O34)2]10-. Comparison with the magnetic and specific heat properties

Author

Andres, Hanspeter, Clemente-Juan, Juan M., Aebersold, Michael, Gudel, Hans U., Coronado, Eugenio, Buttner, Herma, Kearly, Gordon, Melero, Julio, and Burriel, Ramon

Subjects
Cobalt -- Research, Hamiltonian systems -- Research, Magnetic susceptibility -- Measurement, Magnetization -- Measurement, Neutrons -- Scattering, Chemistry
Abstract

Research is presented demonstrating the combined use of an inelastic neutron scattering study with magnetic susceptibility, specific heat and magnetization measurements on a deuterated sample of K10[Co4(H2O)2(PW9O34)2].22H2O, to investigate the ground state properties of a tetranuclear Co2+ cluster.

Published
1999

2. Spin crossover in the 2,2'-bipyrimidine- (bpym-) bridged iron(II) complexes [Fe(L)(NCX)2]2(bpym) (L = 2,2'-bithiazoline (bt) and bpym; X = S, Se): X-ray absorption spectroscopy, magnetic susceptibility, calorimetric, and Mossbauer spectroscopy studies

Author

Real, Jose Antonio, Castro, Isabel, Bousseksou, Azzedine, Verdaguer, Michel, Burriel, Ramon, Castro, Miguel, Linares, Jorge, and Varret, Francois

Subjects
Iron compounds -- Analysis, Coordination compounds -- Analysis, Electron paramagnetic resonance -- Research, Chemistry
Abstract

A series of dimeric iron(II) spin-crossover [Fe(L)(NCS)2]2(bpym) compounds were synthesized by the reaction of [Fe(H2O)6] (ClO4)2 and KNCSe with a methanolic solution of bpym and methanol/dichloromethane. The dinuclear iron(II) spin-crossover compounds such as [Fe(bpym)(NCSe)2]2(bmpy) and [Fe(bt)(NCSe)2]2(bmpy) exhibited an average Fe-N bond distance of 0.2 angstrom for the high spin state. However, [Fe(bpym)(NCSe)2]2(bpym) has a shorter Fe-N bond distance compared to [Fe(bpym)(NCSe)2]2(bpym).

Published
1997

3. Spontaneous magnetization in Ni-Al and Ni-Fe layered double hydroxides

Author

Coronado, Eugenio, Galan-Mascaros, Jose R., Marti-Gastaldo, Carlos, Ribera, Antonio, Palacios, Elias, Castro, Miguel, and Burriel, Ramon

Subjects
Aluminum -- Chemical properties, Aluminum -- Magnetic properties, Magnetization -- Analysis, Nickel alloys -- Magnetic properties, Nickel alloys -- Chemical properties, Chemistry
Abstract

The synthesis and characterization of layered double hydroxides containing paramagnetic [Ni.sup.II] and diamagnetic/paramagnetic [Al.sup.III]/[Fe.sup.III] ions are reported. The remarkable and tunable magnetic properties of layered double hydroxide clays behaving as magnets at high temperatures could find potential application to produce hydrotalcite-like magnetic materials.

Published
2008

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