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Journal of Superconductivity and Novel Magnetism

, Volume 30, Issue 4, pp 1109–1114 | Cite as

GMR and Kondo Effects in Cu-Co Microwires

  • V. Zhukova
  • J. Mino
  • J. J. Del Val
  • M. Ipatov
  • R. Varga
  • M. N. Baibich
  • G. Martinez
  • A. Granovsky
  • A. Zhukov
Original Paper

Abstract

We studied the effect of annealing on magneto-transport, magnetic, and structural properties of Cu100−x Co x (x = 5, 10, 20) glass-coated microwires prepared using the Taylor-Ulitovsky technique. Both as-prepared and annealed samples exhibit magnetoresistance effect. We observed a Kondo-like effect in as-prepared and annealed Cu95Co5 microwire and a significant increase of the giant magnetoresistance (GMR) in all studied Co-Cu after annealing. The origin of GMR effect and Kondo-like behavior is discussed considering structural changes of the annealed samples.

Keywords

Magnetic microwires Giant magnetoresistance Kondo effect Granular alloy 

Notes

Acknowledgments

This work was supported by Spanish MINECO under MAT2013-47231-C2-1-P and the Russian Science Foundation under the 16-19-10233 grants. Technical and human support provided by SGIker (UPV/EHU, MICINN, GV/EJ, ERDF, and ESF) is gratefully acknowledged. VZ and AZ wish to acknowledge the support of the Basque Government under Program of Mobility of the Researchers of the Basque Government (grants MV-2016-1-0025 and MV-2016-1-0018, respectively).

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Dpto. de Física de Materiales, Fac. QuímicasUPV/EHUSan SebastianSpain
  2. 2.Dpto. de Física Aplicada, EUPDSUPV/EHUSan SebastianSpain
  3. 3.Institute of Physics, Faculty of ScienceUPJSKosiceSlovakia
  4. 4.Instituto de FísicaUFRGSPorto AlegreBrazil
  5. 5.Moscow State “Lomonosov” UniversityMoscowRussia
  6. 6.IKERBASQUE, Basque Foundation for ScienceBilbaoSpain

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