Magnetoresistive Features of a Long FeNiCo Nanostrip

Features of Calculation and Investigation of Volt–Oersted Characteristics of an Anisotropic Magnetoresistive Sensor

“…Thus, the studies carried out in the work showed the presence of VOeC hysteresis of the MFS sensor with a "barber-polе" structure, the value of which significantly depends on the magnitude of the current caused by the input voltage, and the external magnetic field strength. The theoretical calculations of VOeCs based on the model of one-dimensional inhomogeneity of magnetization distribution [7] coincide with experimental curves with increasing external magnetic field. However, they do not explain the features of the inverse (hysteresis) curve at high currents and magnetic fields with a decrease in the external magnetic field.…”

“…The maximum difficulty represents the solution of the micromagnetic problem, which, despite the large amount of progress that has been made in addressing this issue for magnetic samples of much smaller size [6], cannot be solved in the general case in the considered variant. In this work, for the considered magnetic strips, this problem is solved under the assumption that there are no magnetic domains, subdomain structures do not arise, and the spatial distribution of magnetization can be assumed to be one-dimensional within the framework of formalism developed in [7]. It should be noted that, under these restrictions, the micromagnetic problem can be solved by other known methods, for example, using the OOMMF software package [8].…”

“…Demagnetizing field H m is determined by the equations of magnetostatics (4) (5) The solution of the equations of magnetostatics can be cast in the form (6) where V is the volume and S is the surface of the magnet. The last term in (1) is the Zeeman energy density: (7) Following [7], we reduce the continual model to a discrete one, dividing the magnetic strip into a system of N cells (long one-dimensional strips), within which the distribution of magnetization is assumed to be uniform. System (1)-( 7) will then be reduced to a system of N equations, and one can use effective mathematical methods to solve it [7].…”

“…The last term in (1) is the Zeeman energy density: (7) Following [7], we reduce the continual model to a discrete one, dividing the magnetic strip into a system of N cells (long one-dimensional strips), within which the distribution of magnetization is assumed to be uniform. System (1)-( 7) will then be reduced to a system of N equations, and one can use effective mathematical methods to solve it [7]. In the investigated MR strips, the current distribution between the low-resistive shunts (Fig.…”

“…2. The solid line shows the theoretical curve calculated within the framework of the proposed model of one-dimensional inhomogeneity of the magnetization distribution in the strip [7]. The symbols in Fig.…”