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Digitale Medien

New Ternary R -Phases with Silicon (1961)

BARDOS, D. I. ; GUPTA, K. P. ; BECK, PAUL A.

[s.l.] : Nature Publishing Group

Nature 192 (1961), S. 744-744

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] It is interesting to note that in all alloys as yet known to consist of the J?-phase one of the component elements has a relatively large co-ordination number 12 atomic radius in relation to that of the others. For example, in all the i?-phases listed in Table 1, the ratio of the co-ordination ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/192744a0

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Digitale Medien

The magnetic susceptibility of transition-metal A15-type phases (1970)

Bardos, D. I. ; Waterstrat, R. M. ; Rowland, T. J. ; [weitere]

Springer

Journal of low temperature physics 3 (1970), S. 509-518

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ISSN: 1573-7357

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The temperature dependence of the paramagnetic susceptibility was measured for several binary A15-type compounds of transition elements. Measurements were made between room temperature and either 3° K or the superconducting transition temperature, whichever was higher. The susceptibilities were found to have, in most cases, a small linear temperature dependence. Molar susceptibilities x M , superconducting transition temperaturesT c, and electronic specific heat coefficients γ for these compounds, when plotted as a function of the valence-electron concentratione/a, reveal peaks at ane/a of about 6.5 for all three properties. Compounds containing the 4d-series transition-elements molybdenum or niobium have higherT c and lower x M values than compounds containing the 3d transition-element chromium or vanadium. It appears that an increased mixing of atoms on either of the two crystallographic sites in the A15-type structure can be associated with a significant decrease in the paramagnetic susceptibility of the compound.