Quantized magnetoresistance in atomic-size contacts

ABSTRACT When the dimensions of a metallic conductor are reduced so that they become comparable to the de Broglie wavelengths of the conduction electrons, the absence of scattering results

in ballistic electron transport1 and the conductance becomes quantized2,3,4. In ferromagnetic metals, the spin angular momentum of the electrons results in spin-dependent conductance

quantization5,6,7 and various unusual magnetoresistive phenomena8,9,10,11,12. Theorists have predicted a related phenomenon known as ballistic anisotropic magnetoresistance (BAMR)13. Here we

report the first experimental evidence for BAMR by observing a stepwise variation in the ballistic conductance of cobalt nanocontacts as the direction of an applied magnetic field is

varied. Our results show that BAMR can be positive and negative, and exhibits symmetric and asymmetric angular dependences, consistent with theoretical predictions. Access through your

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BEING VIEWED BY OTHERS CURRENT DEPENDENCE OF THE NEGATIVE MAGNETORESISTANCE IN SUPERCONDUCTING NBN NANOWIRES Article Open access 20 December 2022 SPIN HALL-INDUCED BILINEAR MAGNETOELECTRIC

RESISTANCE Article 12 September 2024 ANISOTROPIC TRANSPORT INDUCED BY DC ELECTRICAL CURRENT BIAS NEAR THE CRITICAL CURRENT Article Open access 08 October 2020 REFERENCES * Sharvin, Y. V. A

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Scholar  Download references ACKNOWLEDGEMENTS This work was supported by the Nebraska Research Initiative and the National Science Foundation through the Materials Research Science and

Engineering Center (grant DMR-0213808) and the Chemistry Division (grant CHE-0518644). B.D. acknowledges support from a ‘Chaire d'excellence’ fellowship of the French ANR. AUTHOR

INFORMATION AUTHORS AND AFFILIATIONS * Department of Physics and Astronomy, University of Nebraska, Lincoln, 68588, Nebraska, USA Andrei Sokolov & Evgeny Y. Tsymbal * Nebraska Center for

Materials and Nanoscience, University of Nebraska, Lincoln, 68588, Nebraska, USA Andrei Sokolov, Chunjuan Zhang, Evgeny Y. Tsymbal & Jody Redepenning * Department of Chemistry,

University of Nebraska, Lincoln, 68588, Nebraska, USA Chunjuan Zhang & Jody Redepenning * Institut de Physique et de Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS-ULP,

Strasbourg, 67034, France Bernard Doudin Authors * Andrei Sokolov View author publications You can also search for this author inPubMed Google Scholar * Chunjuan Zhang View author

publications You can also search for this author inPubMed Google Scholar * Evgeny Y. Tsymbal View author publications You can also search for this author inPubMed Google Scholar * Jody

Redepenning View author publications You can also search for this author inPubMed Google Scholar * Bernard Doudin View author publications You can also search for this author inPubMed Google

Scholar CONTRIBUTIONS A.S. and C.Z. performed the experiment and analysed the data. E.Y.T. performed the theory, J.R. provided guidance for the electrochemistry part, and B.D. conceived and

designed the experiment. CORRESPONDING AUTHORS Correspondence to Andrei Sokolov or Bernard Doudin. ETHICS DECLARATIONS COMPETING INTERESTS The authors declare no competing financial

interests. SUPPLEMENTARY INFORMATION SUPPLEMENTARY INFORMATION Supplementary figures S1—S4 (PDF 234 kb) RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE

Sokolov, A., Zhang, C., Tsymbal, E. _et al._ Quantized magnetoresistance in atomic-size contacts. _Nature Nanotech_ 2, 171–175 (2007). https://doi.org/10.1038/nnano.2007.36 Download citation

* Received: 14 December 2006 * Accepted: 25 January 2007 * Published: 25 February 2007 * Issue Date: March 2007 * DOI: https://doi.org/10.1038/nnano.2007.36 SHARE THIS ARTICLE Anyone you

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