Concentration Dependence Of Magnetic Susceptibility Research Articles

Kadowaki–Woods plot of exchange-enhanced Pauli paramagnetic Laves phase quasi-binary compoundsLu(Co1−xMx)2

The electrical resistivity and low-temperature specific heat ofexchange-enhanced Pauli paramagnetic Laves phase quasi-binary compoundsLu(Co1−xMx)2 (M = Al, Ga and Si) have been investigated in order to discuss the spinfluctuation characteristics and the Kadowaki–Woods plot. In these threekinds of quasi-binary system, both the electrical resistivity coefficientA and the specificheat coefficient γtot at low temperatures decrease at first and then significantly increase with increasingx. The concentration dependence of magnetic susceptibility at 0 K,χ(0), is also similarto that of A and γtot. The Wilson ratio becomes very large because of the enhancement of magnetic susceptibility. TheKadowaki–Woods plot is fitted to the same universal line of heavy-fermion compounds, A15-typeNb3Sn and V3Si compounds because of significant spin fluctuations in the present quasi-binary compoundsystems.

Magnetic susceptibility and inelastic electrical resistivity of GdZnxCu1−x alloys

The deviation from the Nordheim-Kurnakov rule and the anomalous behavior of spin-disordered electrical resistivity in quasi-binary GdZn (T C =268 K)-GdCu (T N =142 K) solid solutions is explained in effective medium approximation within percolation theory for the case of three phases, viz., ferro-, antiferro-, and paramagnetic. The strong increase of ρ at zinc concentrations x∼0.45 is attributed to the closeness of the system to the percolation threshold. The phase volumes calculated for the random-distribution case fit well to the concentration dependence of magnetic susceptibility.

Concentration dependence of magnetic susceptibility for the system of dilute magnetic impurities

The concentration dependence of the magnetic susceptibility for the system of randomly distributed dilute magnetic impurities in a d-dimensional metal or on a metal surface is studied at zero-temperature under the mean-random-field approximation. It is shown that, if the amplitude of the RKKY-type interaction between the magnetic impurities behaves like 1 r n at a large distance r, the susceptibility is proportional to c 1−( n d ) , where c is the concentration of the magnetic impurities.

Magnetic susceptibilities of liquid binary alloys

A description of the concentration dependence of the magnetic susceptibilities of a number of liquid binary alloys of simple metals is effected in three stages. First, a previous pseudopotential formalism is extended to enable the calculation of the conduction electron diamagnetic susceptibilities in the pure liquid metals, Li, Na, K, Rb, Cs, In and Pb. These results are then combined with much earlier calculated values of the diamagnetic susceptibilities of the core electrons and with observed values, existing in the literature, of the total magnetic susceptibilities to infer the conduction electron paramagnetic susceptibilities of the above pure liquid metals. Second, the expressions for the two diamagnetic contributions are modified permitting the determination of their concentration dependence in a number of nearly-free-electron (NFE) like liquid binary alloys. The Landau theory of a Fermi liquid is used to infer the concentration dependence of the paramagnetic contribution. Third, Li-Pb, which is not NFE like over the entire concentration range is treated separately as a special but closely related case. The observed results for the concentration dependence of the total magnetic susceptibility are favourably reproduced, both for those alloy systems exhibiting smooth variations and for those with large variations.

Electrical Conductivity and Magnetic Susceptibility of Liquid Tl2 (TexSe1-x) Mixtures

Abstract The electrical conductivity α and the magnetic susceptibility φ of liquid Tl2 (TexSe1-x) mixtures have been measured up to 900°C. The concentration dependence of magnetic susceptibility due to the conduction electrons, φe, is considerably small in the intermadiate concentration range at low temperature and φe changes continuously at high temperature.