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5 results on '"Massarotti, V"'

1. Magnetic properties and spin dynamics in hole-doped S=1 AF chain: (super89)Y NMR and susceptibility in Y(sub2-x)CaxBaNiO(sub5)

Author

Tedoldi, F., Rigamonti, A., Brugna, C., Corti, M., Lascialfari, A., Capsoni, D., and Massarotti, V.

Subjects
Rotational motion -- Observations, Magnetic resonance imaging -- Usage, Physics
Abstract

The compound Y(sub2)BaNiO(sub5) (YBNO) is distinguished by the presence of weakly coupled chains of interacting Ni(super2+) ions. YBNO is of interest as the relatively high gap and small values of the anistropy terms D and E enable the study of the Haldane ground state in a wide temperature range. The magnetic susceptibility X, (super89)Y shift K, T(sub1) and T(sub2) measurements in Y(sub2-x)CaxBaNiO(sub5), is presented. (super89)Y relaxation rates suggest that holes induce low-energy excitations with efficient spectral density.

Published
1998

3. Structural and spectroscopic properties of pure and doped [Ba.sub.6][Ti.sub.2][Nb.sub.8][O.sub.30] tungsten bronze

Author

Massarotti, V., Capsoni, D., Bini, M., Mozzati, M.C., Galinetto, P., Chiodelli, G., and Azzoni, C.B.

Subjects
Titanium compounds -- Structure, Titanium compounds -- Electric properties, Titanium compounds -- Chemical properties, Chemical synthesis -- Analysis, Barium compounds -- Structure, Barium compounds -- Electric properties, Barium compounds -- Chemical properties, Chemicals, plastics and rubber industries
Abstract

Pure and doped [Ba.sub.6][Ti.sub.2][Nb.sub.8][O.sub.30] (BTN) obtained by substituting M=Cr, Mn or Fe on the Ti site and Y and Fe on the Ba and Ti sites, respectively are synthesized. The tungsten bronze BTN framework displays a sponge like behavior related to the availability of the different cationic sites to host suitable doping ions without modifying the cell volume and structure.

Published
2006

4. Cation distribution in LiMgVO4 and LiZnVO4: Structural and spectroscopic study

Author

Capsoni, D., Bini, M., Massarotti, V., Mustarelli, P., Belotti, F., and Galinetto, P.

Subjects
Lithium compounds -- Structure, Lithium compounds -- Properties, Nuclear magnetic resonance spectroscopy -- Analysis, X-rays -- Diffraction, X-rays -- Analysis, Chemicals, plastics and rubber industries
Abstract

The cation distribution in LiMgVO4 and LiZnVO4 crystallographic sites is determined by using X-ray powder diffraction (XRPD), (super 7)Li and (super 51)V magic angle spinning nuclear magnetic resonance (MAS NMR) and micro-Raman measurements. High temperature XRPD measurements have ruled out the possible structural transitions up to 673 K for both compounds.

Published
2006

5. Transport and structural properties of pure and Cr doped Li3VO4

Author

Massarotti, V., Capsoni, D., Bini, M., Mustarelli, P., Chiodelli, G., Azzoni, C.B., Galinetto, P., and Mozzati, M.C.

Subjects
Chromium compounds -- Structure, Chromium compounds -- Electric properties, Lithium compounds -- Structure, Lithium compounds -- Electric properties, Raman spectroscopy -- Research, X-rays -- Diffraction, X-rays -- Research, Chemicals, plastics and rubber industries
Abstract

The effect of 5 and 10 percent chromium additions on the transport and structural properties of Li3VO4 is examined. X-ray powder diffraction and micro-Raman analysis reveal that the Cr substitution is easily obtained without impurity phases and is ineffective in the room- and high-temperature host crystal structure.

Published
2005

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