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303 results on '"Kalvius, G.M."'

43. Muon spin resonance study on U[Cu.sub.1.5][Sn.sub.2]

Author

El-Khatib, S., Llobet, A., Kalvius, G.M., Noakes, D.R., Stronach, C.E., Ansaldo, E.J., Torikachvili, M.S., and Nakotte, H.

Subjects
Copper compounds -- Structure, Copper compounds -- Magnetic properties, Copper compounds -- Optical properties, Electron paramagnetic resonance -- Analysis, X-rays -- Diffraction, X-rays -- Observations, Physics
Abstract

Muon spin relaxation measurements on U[Cu.sub.1.5][Sn.sub.2], which has crystallized in the Ca[Be.sub.2][Ge.sub.2]-type structure, are presented. Critical slowing down for the paramagnetic U spin fluctuations is not present, which is typical in first-order transitions, whereas the temperature dependence of the local field generated by the U spins is a second-order feature.

Published
2006

46. When simple alloys turn into complicated

Author

Espeso, J.I., Gómez Sal, J.C., Marcano, N., Kalvius, G.M., Noakes, D.R., Amato, A., Zlatić, Veljko, Aviani, Ivica, Očko, Miroslav, Haines, S., R. Smith, Saxena, S.S., and V. Zlatić

Subjects
Ce alloys, incommensurate structures
Abstract

In some cases, simple metallic alloys, whose magnetic behaviour is supposed to be wellknown and, thus, they are not subject of further studies, might surprise us revealing anomalous behaviours that point towards a more complicated magnetic ground state. This is the case of CeGe, a binary Ce-based alloy that was already studied in the 60’ s, and reported as a simple antiferromagnet [1], being this consideration accepted until recent times [2]. However, a careful study of this alloy has evinced that the magnetic ground state of this alloy must be more complex. In the present work we will show experimental results that clearly prove that the magnetic structure of CeGe at low temperatures must be incommensurate. These results include microscopic probes, such as neutron diffraction or muon spectroscopy, and macroscopic measurements, among which the transport properties (electrical resistivity and thermoelectric power) are specially relevant, as they exhibit an anomalous behaviour at the Néel temperature that is indicative of a gap opening at the magnetic superzone. [1] K.H.J. Buschow and J.F. Fast, Phys. Stat. Sol. 16, 467 (1966). [2] P. Schobinger-Papamantellos, M. Kenzelmann, A. Schenck, F.N. Gygax, K.H.J. Buschow and C. Ritter, Physica B 349, (2004) 100. 22

Published
2008

50. A SR magnetic study of UNiGe

Author

Kalvius, G.M., primary, Noakes, D.R., additional, El-Khatib, S., additional, Ansaldo, E.J., additional, Stronach, C.E., additional, Brück, E., additional, and Nakotte, H., additional

Published
2007
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