Transition metals Hall effect

We shall briefly discuss the electrical properties of the metal oxides. Thermal conductivity, electrical conductivity, the Seebeck effect, and the Hall effect are some of the electron transport properties of solids that characterize the nature of the charge carriers. On the basis of electrical properties, the solid materials may be classified into metals, semiconductors, and insulators as shown in Figure 2.1. The range of electronic structures of oxides is very wide and hence they can be classified into two categories, nontransition metal oxides and transition metal oxides. In nontransition metal oxides, the cation valence orbitals are of s or p type, whereas the cation valence orbitals are of d type in transition metal oxides. A useful starting point in describing the structures of the metal oxides is the ionic model.5 Ionic crystals are formed between highly electropositive... 

For a good discussion of the modified hydroformylation process including an analysis of phosphine ligand effects, see C. Masters, Homogeneous Transition-Metal Catalysis—A Gentle Art, Chapman Hall London, 1981, pp. 114-120. 

The Hall effect occurs when a current-carrying conductor is placed in a magnetic field and is related to the difference between electron conduction and positive-hole conduction. Electron conduction is the dominant factor in the transition metal carbides which, with the exception of WC, all have a negative Hall constant. A discussion of the Hall effect in interstitial carbides is found in Ref 15. 

The behavior of the type-3d transition metal impurity was investigated by using deep-level transient spectroscopic and Hall-effect measurements. Deep-level transient spectroscopic data revealed 1 donor state and an acceptor. Pairs of donors with B, which acted as donors, were also detected. The diffusivities at 300 to 673K were described by ... 

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