Spin-glass phase transition revealed in transport measurements

Forestier, G. and Solana, M. and Naud, C. and Wieck, A.D. and Lefloch, F. and Whitney, R. and Carpentier, D. and Lévy, L.P. and Saminadayar, L.

Volume: 102 Pages:
DOI: 10.1103/PhysRevB.102.024206
Published: 2020

We have measured the resistivity of magnetically doped Ag:Mn mesoscopic wires as a function of temperature and magnetic field. The doping has been made using ion implantation, allowing a distribution of the dopants in the middle of the sample. Comparison with an undoped sample, used as a reference sample, shows that the resistivity of the doped sample exhibits nonmonotonic behavior as a function of both magnetic field and temperature, revealing the competition between the Kondo effect and the RKKY interactions between spins. This proves that transport measurements are still a reliable probe of the spin-glass transition in nanoscopic metallic wire doped using implantation. © 2020 American Physical Society.

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