Magnetic fields change the way that electrons move through solids. The nature of these changes reveals information about the electronic structure of a material and, in auspicious circumstances, can be harnessed for applications. The silver chalcogenides, Ag2Se and Ag2Te, are non-magnetic materials, but their electrical resistance can be made very sensitive to magnetic field by adding small amounts—just 1 part in 10,000—of excess silver1,2,3,4. Here we show that the resistance of Ag2Se displays a large, nearly linear increase with applied magnetic field without saturation to the highest fields available, 600,000 gauss, more than a million times the Earth's magnetic field. These characteristics of large (thousands of per cent) and near-linear response over a large field range make the silver chalcogenides attractive as magnetic-field sensors, especially in physically tiny megagauss (106 G) pulsed magnets where large fields have been produced but accurate calibration has proved elusive. High-field studies at low temperatures reveal both oscillations in the magnetoresistance and a universal scaling form that point to a quantum origin5,6 for this material's unprecedented behaviour.
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Xu, R. et al. Large magnetoresistance in non-magnetic silver chalcogenides. Nature 390, 57–60 (1997)
Chuprakov, I. S. & Dahmen, K. H. Large positive magnetoresistance in thin films of silver telluride. Appl. Phys. Lett. 72, 2165–2167 (1998)
Ogorelec, Z., Hamzic, A. & Basletic, M. On the optimization of the large magnetoresistance of Ag2Se. Europhys. Lett. 46, 56–61 (1999)
Schnyders, H. S., Saboungi, M.-L. & Rosenbaum, T. F. Magnetoresistance in n- and p-type Ag2Te: Mechanisms and applications. Appl. Phys. Lett. 76, 1710–1712 (2000)
Abrikosov, A. Quantum magnetoresistance. Phys. Rev. B 58, 2788–2794 (1998)
Abrikosov, A. Quantum linear magnetoresistance. Europhys. Lett. 49, 789–793 (2000)
Boebinger, G. S., Lacerda, A. H., Schneider-Muntau, H. J. & Sullivan, N. The National High Magnetic Field Laboratory's pulsed magnetic field facility in Los Alamos. Physica B 294–295, 512–518 (2001)
Mackay, K., Bonfim, M., Givord, D. & Fontaine, A. 50 T pulsed magnetic fields in microcoils. J. Appl. Phys. 87, 1996–2002 (2000)
von Ortenberg, M. et al. The Humboldt high magnetic field center at Berlin. Physica B 294–295, 568–573 (2001)
Drndic, M., Johnson, K. S., Thywissen, J. H., Prentiss, M. & Westervelt, R. M. Micro-electromagnets for atom manipulation. Appl. Phys. Lett. 72, 2906–2908 (1998)
Kohler, M. Zur magnetischen Widerstandsänderung reiner Metalle. Ann. Phys. 32, 211–218 (1938)
Pippard, A. P. Magnetoresistance in Metals (Cambridge Univ. Press, Cambridge, 1989)
McKenzie, R. H., Qualls, J. S., Han, S. Y. & Brooks, J. S. Violation of Kohler's rule by the magnetoresistance of a quasi-two-dimensional organic metal. Phys. Rev. B 57, 11854–11857 (1998)
Harris, J. M. et al. Violation of Kohler's rule in the normal state magnetoresistance of YBa2Cu3O7-δ and La2 - xSrxCuO4 . Phys. Rev. Lett. 75, 1391–1394 (1995)
Herring, C. Effect of random inhomogeneities on electrical and galvanomagnetic measurements. J. Appl. Phys. 31, 1939–1953 (1960)
Aliev, S. A. & Aliev, F. F. Band parameters and energy structure of β-Ag2Se. Izv. Akad. Nauk SSSR Neorg. Mater. 21, 1869–1872 (1985)
Tritton, D. J. Physical Fluid Dynamics (Van Nostrand Reinhold, New York, 1977)
We thank H. Hwang, L. P. Kadanoff and H. S. Schnyders for discussions, and the late R. Xu for technical assistance. The work at the University of Chicago and at Argonne National Laboratory was supported by DOE Basic Energy Sciences.
The authors declare that they have no competing financial interests.
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Husmann, A., Betts, J., Boebinger, G. et al. Megagauss sensors. Nature 417, 421–424 (2002). https://doi.org/10.1038/417421a
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