Journal ArticleDOI
Electrical Resistivity of Laves Phase Compounds Containing Transition Elements I. Fe 2 A (A=Sc, Y, Ti, Zr, Hf, Nb, and Ta)
Kôki Ikeda,Takurô Nakamichi +1 more
TLDR
In this article, the electrical resistivity of a series of Fe 2 A Laves phase compounds was measured in order to investigate its mutual correlation with their magnetic properties, and a linear relation between the magnetic resistivity at temperatures above the Curie or Neel point and the localized magnetic moment was found.Abstract:
The electrical resistivity of a series of Fe 2 A Laves phase compounds was measured in order to investigate its mutual correlation with their magnetic properties. In the ferromagnetic or antiferromagnetic Fe 2 A compounds (A=Sc, Y, Ti, Zr, Hf, and U), a linear relation between the magnetic resistivity at temperatures above the Curie or Neel point and the localized magnetic moment was found, which means that the magnetic resistivity of these compounds is governed by the magnitude of magnetic moments. The electrical resistivity in the Pauli-paramagnetic Fe 2+ x Nb 1- x and Fe 2+ x Ta 1- x compounds with x ≈0 shows a fairly large temperature variation, which seems to be due to the paramagnon scattering, whereas ρ- T curves in the iron-rich compounds suggest that the appearance of ferromagnetism is caused by the existence of the excess iron atoms occupying the wrong atomic sites.read more
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Fundamental Properties of Intermetallic Compounds
TL;DR: The properties of intermetallics have been studied extensively in the literature as discussed by the authors, and many of them are known to have extraordinary functions and characteristics that are not observed in ordinary metals and alloys.
Journal ArticleDOI
Transforming Thermal Expansion from Positive to Negative: the Case of Cubic Magnetic Compounds of (Zr,Nb)Fe2.
Yuzhu Song,Qiang Sun,Toshihiko Yokoyama,Huihui Zhu,Qiang Li,Rongjin Huang,Yang Ren,Qingzhen Huang,Xianran Xing,Jun Chen +9 more
TL;DR: A chemical modification strategy is reported to transform thermal expansion from positive to negative in the cubic magnetic compounds of (Zr,Nb)Fe2 by tuning magnetic exchange interaction, and an isotropic zero thermal expansion (ZTE) can be established in Zr0.8Nb0.2Fe2.
Journal ArticleDOI
Electrical Resistivity of Laves Phase Compounds Containing Transition Elements. II. Co 2 A (A=Ti, Y, Zr, and Nb)
TL;DR: In this paper, the electrical resistivity of a series of Co 2 A Laves phase compounds was measured in order to investigate its mutual correlation with their magnetic properties, and it was shown that the substitutional cobalt atoms in these compounds give rise to the Kondo effect with a characteristic temperature of ∼100 K.
References
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Journal ArticleDOI
Electrical Resistance of Ferromagnetic Metals
TL;DR: In this paper, the anomalous electrical resistance in ferromagnetic metals was investigated from the perspective of s-d interaction and it was shown that this interaction is not periodic in finite temperatures, and that the exchange energy between conduction and inner shell electrons depends on the relative direction of the spins of the electrons.
Journal ArticleDOI
Electrical and thermal resistivity of the transition elements at low temperatures
G. K. White,S. B. Woods +1 more
TL;DR: In this paper, the results of measurements on 20 transition elements were reported giving values for the thermal resistivity, W i and p i { (due to scattering of the electrons by thermal vibrations), are deduced from these and tabulated for various temperatures.
Journal ArticleDOI
The Contribution to the Electrical Resistance of Metals from Collisions between Electrons
TL;DR: The theory of electrical resistance developed by Bloch and others reats the conduction electrons as moving independently of one another but interacting with the lattice vibrations as discussed by the authors, and gives for the resistance of a metal, subject to certain simplifying assumptions, the formula R = const.
Journal ArticleDOI
Spin-dependence of the resistivity of magnetic metals
R.J. Weiss,A.S. Marotta +1 more
TL;DR: The theory of friedel based on an exchange interaction between the current carriers and the atomic spins is also shown to be applicable to non-halfintegral spin metals such as nickel and cobalt.
Journal ArticleDOI
The Electrical Conductivity of the Transition Metals
Abstract: 1·1. The conductivity of a pure metal depends upon a large number of quantities, and it is difficult to decide the relative importance of the various constants since they often produce compensating effects. It is, however, generally agreed that the low conductivity of the divalent metals, and especially of bismuth, is due to the small effective number of conduction electrons. It has further been suggested by Mott (1935, 1936a, 1936b) that the low conductivity of the transition elements, which are even worse conductors than the divalent elements, is due to another cause, namely, to the abnormal smallness of the free path. The transition metals possess conduction electrons in an s-band and they also have unfilled d-bands. Hence, in addition to the normal s-s transitions the electrons can also undergo s-d transitions, and this results in a shortening of the free path. One of the difficulties in the way of a complete theory is the necessity of separating the normal s-s transitions from the s-d transitions, and so far it has not proved possible to do this. In the present paper it is shown that the resistances produced by the two different types of transition have different temperature variations, and therefore that it should be possible to estimate their relative importance by measurements over a sufficiently large range of temperature.