Crystalline and induced anisotropy and structural defects in single-crystal spinel ferrite films

Structural reasons for the perpendicular anisotropy in ferrospinel single-crystal films

“…7 and 12 in Tables 6 and 7) whose rate of cooling after synthesis equal to ~ 3.3 deg/s was minimum. Let us consider possible reasons for such dependences on an example of Mn x Fe 3-x O 4 films whose magnetic [8], mechanical [9], electric [10], and optical [22] properties have been studied most completely.…”

“…To determine the crystallographic anisotropy constants, the method of rotational momenta [8] was used. The saturation magnetization was measured with a magnetometer.…”

“…The surface relief of a film fragment was registered by the method of atomic force microscopy. The internal stresses in ferrospinel films were determined using the x-ray tensometry [11] by the method of ferromagnetic resonance [8] and from the curvature radius [7]. These methods demonstrated that the internal stresses in ferrospinel films were ~10 8 Pa.…”

“…Among them are anisotropy of the geometrical film shape, induced uniaxial anisotropy, and anisotropy with predominant axes perpendicular to the film plane [1][2][3][4][5][6][7]. One of the factors influencing the magnetic properties of ferrospinel films is their microstructure [8].…”