Effect of Mechanical Stress on Magnetic States and Hysteresis Characteristics of a Two-Phase Nanoparticles System

Table 2

A diagram of the ground (light fill area) and metastable (dark fill area) states of the two-phase elongated (𝑞₁=3) nanoparticles (CoFe₂O₄-𝛾-Fe₂O₃) system located in the field of mechanical stress 𝜎. Positive value 𝑘_𝜎=0.8, that is, the right column of the table, corresponds to compressive stress; 𝑘_𝜎=−0.8 column at 𝑘_𝜎=0 no stress (center column) corresponds to tensile stress. Table rows correspond to different values of interfacial interaction 𝐴_in=𝛼⋅10⁻⁸ Erg/cm. Arrows indicate the state of parallel (↑↑) (the first and the third) and antiparallel (↑↓) (the second and the fourth) orientation of the magnetic moments of nanoparticles’ phases.

	𝑘𝜎=−0.8	𝑘𝜎=0	𝑘𝜎=0.8
𝛼=−5
𝛼=−3
𝛼=−1
𝛼=0
𝛼=1
𝛼=3
𝛼=5