Extrinsic magnetotransport phenomena in ferromagnetic oxides

By M. Ziese. 2001

432 citations recorded by the source corpus.

Magnetic oxides show a variety of extrinsic magnetotransport phenomena: grain-boundary, tunnelling and domain-wall magnetoresistance. In view of these phenomena the role of some magnetic oxides is outstanding: these are believed to be half-metallic having only one spin-subband at the Fermi level. These fully spin-polarized oxides have great potential for applications in spin-electronic devices and have, accordingly, attracted intense research activity in recent years. This review is focused on extrinsic magnetotransport effects in ferromagnetic oxides. It consists of two parts; the second part is devoted to an overview of experimental data and theoretical models for extrinsic magnetotransport phenomena. Here a critical discussion of domain-wall scattering is given. Results on surface and interfacial magnetism in oxides are presented. Spin-polarized tunnelling in ferromagnetic junctions is reviewed and grain-boundary magnetoresistance is interpreted within a model of spin-polarized tunnelling through natural oxide barriers. The situation in ferromagnetic oxides is compared with data and models for conventional ferromagnets. The first part of the review summarizes basic material properties, especially data on the spin polarization and evidence for half-metallicity. Furthermore, intrinsic conduction mechanisms are discussed. An outlook on the further development of oxide spin-electronics concludes this review.

Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/ff02eee0ddaab76eb1ff0931a017df03ff33a2a1

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In Condensed Matter Physics

In Electronic, Optical and Magnetic Materials

In Materials Chemistry

Citations in the corpus

Spin-polarised currents and magnetic domain walls (2005, methodology): “The transport properties of magnetic oxides, including domain wall effects, were reviewed by Ziese [8].”
Half-metallic ferromagnets: From band structure to many-body effects (2007, background): “We will concentrate on this phase here and refer to other reviews for a more complete overview of the manganites (Dagotto, 2003; Nagaev, 2001; Salamon and Jaime, 2001; Ziese, 2002).”