For a number of Y(Co, Al)₂ and (R, Y)Co₂ compounds, the effects of external and internal (molecular) fields on the resistivity are accentuated. The results show that the resistivity is initially enhanced by applied field. A sharp decrease in resistivity, which is possibly due to the quenching of the spin fluctuations, can only be observed just at the metamagnetic transition. The different roles of the external and molecular fields on this phenomenon are also discussed. © 1994.

Nguyen Huu Duc

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Từ khóa : Electric conductivity; Electron scattering; Electron transport properties; Magnetic field effects; Magnetic variables measurement; Magnetization; Metamagnetism; Phase transitions; Quantum theory; Quenching; Specific heat; Laves phase; Magnetic moment; Magnetic scattering; Molecular fields; Spin fluctuation scattering; Intermetallics