Paper Title:
Magnetization and Giant Negative Magneto-Resistance in Nano-Scale Ni3-δMn1+δ in Pulsed Magnetic Fields up to 25 T
  Abstract

Magneto-transport phenomena of slightly Mn-rich sample in the host Ni3-Mn system were investigated on giant-negative magneto-resistance of 15% in pulsed high magnetic fields up to 25 T. We prepared nano-scale crystals of Nin (0≤≤0.05) fabricated by rapid quenching method with a mono-role and by optimum annealing to obtain the maximum magneto-resistance effect in the longitudinal configuration of sample currents and magnetic fields. The negative magneto-resistance observed in this study was interpreted as the scattering decrease of conduction electrons by anti-parallel spin pairs composed of Mn-Mn deviated from the stoichiometry. This physical mechanism also reflects the coherent length change of itinerant electrons, caused by the scattering by the comparable short-range spin disorder of Mn-Mn pairs in the nano-scale crystal grain.

  Info
Periodical
Edited by
A.G. Mamalis, M. Enokizono and A. Kladas
Pages
95-102
DOI
10.4028/www.scientific.net/MSF.670.95
Citation
K. Yamada, J. L. Luo, H. Shimoji, Y. Nakahata, E. B. Borkowski, T. Todaka, M. Enokizono, T. Okazaki, "Magnetization and Giant Negative Magneto-Resistance in Nano-Scale Ni3-δMn1+δ in Pulsed Magnetic Fields up to 25 T", Materials Science Forum, Vol. 670, pp. 95-102, 2011
Online since
December 2010
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