Temperature dependence of the resistivity of in a magnetic field of and in the absence of field. The temperature dependence of , % is plotted on the right-hand scale.
Low-temperature behavior of in in a magnetic field of and in the absence of field. The curves correspond to approximations according to formulas (1)–(3).
Experimental data on for and the approximating curves obtained using various models: experiment (○), spin-polarized tunneling (—), (---), Coulomb blockade model (⋅⋅⋅⋅), (–⋅–).
Magnetic-field dependence of for at . The inset shows the field dependence of the magnetoresistance at and . The curves correspond to approximations using expressions (4) and (5) with the fitting coefficients (at ): , , , , , .
Temperature dependence of the correlation function at and at .
Parameter values giving the best fit to the experimental data in the spin-polarized tunnel and Coulomb blockade models.
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