Electrical Resistivity of Amorphous Fe_1–xB_K Alloys

Abstract

Qcalc bQcm) 0.12 0.55 129 0.18 0.55 128 0 . 2 4 0.55 137 0.28 0 . 5 4 138 0.32 0.53 142 0 . 3 7 0.52 147 0. 70 0.48 191 m n Q (u62cm) at 4 . 2 K 110 130 136 139 142 153 330 exP phys. stat. sol. (b) 125, K17l (1984) Amorphous FeB alloys have been extensively studied for the last years because of their interesting mechanical, electrical, and magnetic properties. There are, however, surprisingly few works dealing with a systematic investigation of the dependence of the electrical resistivity of these alloys on concentration (/l/ and references therein). This note presents new measurements of their resistivity at liquid helium temperature and calculations which explain the results within the diffraction model. Our samples of Fey -,BX alloys were prepared a s thin films by means of the rf sputtering technique. The amorphous state was confirmed in a wide range of boron concentration 0.12 5 x 5 0.70 by electron diffraction microscopy The resistivity was measured by the four-probe method at 4 . 2 K. Further experimental details can be found in /1/ and /2/. Results a r e reported in the table. T a b l e 1 Calculated and experimental resistivity for various boron concentrations x 1 ) al.

Transport properties of Ni81.5B18.5 - YP y amorphous alloys

“…The values of q are very close to the values obtained by other authors for the similar Table II. -Calculated quantities used as the parameters in the extended Ziman theory. amorphous alloy systems [4]. Theoretical structure factor for Ni81.5P 18.5 fits well the experimental one around the first maximum [25].…”

“…However, the concentration dependence of the thermopower was not correct. Such an inconsistency was removed by applying Lloyd's formula [3] and some relatively good results for residual resistivity were obtained, but that generated too large a number of conducting electrons (Zc> 2) [3,4].…”

Spontaneous hall effect and magnetization of Fe–(B, Zr) and Co– Mo amorphous films

“…The COB data of From a quantum-mechanical theory of the side jump mechanism in free-electron approximation Berger [27] proved that yHs is proportional to the side jump parameter Ay according to (4). In our previous paper we calculated the Fermi wave number k, as a function of composition in FeB and FeZr amorphous alloys [28,29] making use of effective valencies which gave the best fit to our experimental values of the resistivity. The band theory suggests a proportionality between ylrs and the saturation magnetostriction A, , because both phenomena are of the same origin arising from the spin-orbit interaction [31].…”

“…5 ) curves show that the Hall conductivity is approximately linear in magnetization according to From a quantum-mechanical theory of the side jump mechanism in free-electron approximation Berger [27] proved that yHs is proportional to the side jump parameter Ay according to (4). In our previous paper we calculated the Fermi wave number k, as a function of composition in FeB and FeZr amorphous alloys [28,29] making use of effective valencies which gave the best fit to our experimental values of the resistivity. Table 1.…”

Electrical resistivity of liquid binary and ternary alloys

“…This approach was necessary particularly for the transition metals where the first Born approximation was not accurate enough [7][8][9][10][11]. What we have found examining this model is that the results here are much more stable than for the F-Z one, and that there is practically no free choice of parameters.…”