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Showing papers by "National Institute of Advanced Industrial Science and Technology published in 1981"


Journal ArticleDOI
TL;DR: In this article, it is shown that the observed low temperature properties of the 29 Si spin-echo spectrum and the exp (T -1/4 ) type temperature dependence of the resistivity can be explained consistently by considering the existence of the Anderson localized states (caused presumably by some residual imperfections of the crystal) with intra-state correlation.
Abstract: 29 Si NMR as well as magnetic susceptibility and electrical resistivity measurements have been performed on an “unusual” paramagnet FeSi It is shown that the observed low temperature properties–such as the asymmetric shape of the 29 Si spin-echo spectrum and the exp ( T -1/4 ) type temperature dependence of the resistivity–can be explained consistently by considering the existence of the Anderson localized states (caused presumably by some residual imperfections of the crystal) with intra-state correlation At higher temperatures, it is suggested from the temperature dependences of the 29 Si spin-lattice relaxation time and the resistivity that the thermodynamical properties are governed by the correlated modes of spin fluctuations with strongly temperature-dependent amplitude

45 citations


Journal ArticleDOI
TL;DR: In this paper, the scaling parameters obtained from the reduced Tosi-Fumi potential were put to use for the reduction of the viscosity values, and an empirical universal relationship of η−1∝V⋅T1/2 among the reduced properties η, V, and T was found.
Abstract: The principle of corresponding states has been applied to the viscosity of alkali halide single salts and their binary mixtures. The scaling parameters obtained from the reduced Tosi–Fumi potential were put to use for the reduction of the viscosity values. An empirical universal relationship of η−1∝V⋅T1/2 among the reduced properties η, V, and T was found to be established for alkali halides viscosity. The relationship thus found was further examined for the viscosity of other kinds of liquid, viz., alkali nitrates, liquid metals, hydrocarbons, and rare gases. For either substance, a reasonable conformity was observed.

15 citations