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

Koji Yamada; Jiao Lian Luo; Hiroyasu Shimoji; Yasusi Nakahata; Edmund Bartosz Borkowski; Takashi Todaka; Masato Enokizono; Teiko Okazaki

doi:10.4028/www.scientific.net/MSF.670.95

Paper Titles

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Comparison of Iron Losses in Multiple Grain Size Iron Laminations under Sinusoidal and SPWM Excitation
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Effect of Stress on the Magnetic Characteristics of SmFe Thin Films
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On the Magnetic and Magnetoelastic Uniformity Measurements on Fe₇₈Si₇B₁₅ Amorphous Ribbons and Wires
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Magnetization and Giant Negative Magneto-Resistance in Nano-Scale Ni_3-δMn_1+δ in Pulsed Magnetic Fields up to 25 T
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Magnetic Torque Evaluation for Magnetized Nanoparticles
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Numerical Analysis of the Polishing Process of Inner Tube Wall Using Micron-Size Particles in Magnetic Fluids
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Nanostructure Formation in Silicon Photovoltaic Cells by Femtosecond Laser Pulses
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Measurements of Magnetic Properties of Fe-Mn-Cr-Si-Sm-B Ferromagnetic Shape Memory Ribbons Depending on Stress and Temperature
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HomeMaterials Science ForumMaterials Science Forum Vol. 670Magnetization and Giant Negative...

Magnetization and Giant Negative Magneto-Resistance in Nano-Scale Ni_3-δMn_1+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.