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Nanostructured Magnetic Materials and their Applications pp 393–417Cite as

Huge Magnetoresistance in Quantum Magnetic Nanocontacts

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Part of the book series: NATO Science Series ((NAII,volume 143))

Abstract

The quasiclassical theory of a nanosize point contacts (PC) between two ferromagnets is developed. The maximum available magnetoresistance in PC is calculated for ballistic and diffusive transport at the area of a contact. In the ballistic regime, the magnetoresistance in excess of few hundreds percents is obtained for the iron-group ferromagnets. The regime of quantized conductance through the magnetic nanocontact is considered. It is shown that magnetoresistance is tremendously enhanced at small number of open conductance channels. The quantum spin valve realization is discussed in detail, and recent observations of huge (up to 100’000%) magnetoresistance in the electrodeposited nickel nanocontacts are discussed in the framework of the developed theory.

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Author information

Authors and Affiliations

  1. Kazan State University, Kazan, 420008, Russia

    L. R. Tagirov

  2. Kazan Physico-Technical Institute of RAS, Kazan, 420029, Russia

    L. R. Tagirov

  3. Theoretische Physik III, Ruhr-Universität Bochum, 44780, Bochum, Germany

    K. B. Efetov

  4. L.D. Landau Institute for Theoretical Physics, Moscow, 117940, Russia

    K. B. Efetov

Authors
  1. L. R. Tagirov
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  2. K. B. Efetov
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Editor information

Editors and Affiliations

  1. Gebze Institute of Technology, P.O. 141, 41400, Gebze Kocaeli, Turkey

    Bekir Aktaş

  2. Kazan State University, 420008, Kazan, Russian Federation

    Lenar R. Tagirov

  3. Institute of Physics of NAS, Baku, Azerbaijan

    Faik Mikailov

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© 2004 Springer Science+Business Media Dordrecht

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Tagirov, L.R., Efetov, K.B. (2004). Huge Magnetoresistance in Quantum Magnetic Nanocontacts. In: Aktaş, B., Tagirov, L.R., Mikailov, F. (eds) Nanostructured Magnetic Materials and their Applications. NATO Science Series, vol 143. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-2200-5_31

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  • DOI: https://doi.org/10.1007/978-1-4020-2200-5_31

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-1-4020-2004-9

  • Online ISBN: 978-1-4020-2200-5

  • eBook Packages: Springer Book Archive

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