Effect of mechanical stresses on the saturation remanence of a system of nanoparticles

Effect of mechanical stresses on the saturation remanence is investigated within the model of an ensemble of single-domain nanoparticles. It is shown that with increasing small uniaxial stresses the saturation remanence changes linearly. It is noted that an increase in tensile stresses leads to an increase in the longitudinal and decrease in the transverse remanence. The rate of change in the saturation remanence under the effect of a small longitudinal stress is half the appropriate rate of change in these characteristics in the transverse direction. With increasing tensile stresses, the longitudinal saturation remanence reaches a maximum (Irs‖ > 0.5cIs) and then monotonically decreases to a certain limiting value. Compression leads to a monotonic decrease in Irs‖. The behavior of the transverse saturation remanence under the effect of a linear uniaxial tension (compression) is similar to the behavior of the longitudinal remanence during compression (tension). The results obtained agree well with the experiment.