Dimensional Effect in Magnetoresistance in the Three-Layer Magnetic Films

• Published in: 2021 IEEE 11th International Conference Nanomaterials: Applications & Properties (NAP) pp. 1 - 3
• Main Authors: Shabelnyk, Yu. M., Dekhtyaruk, L. V., Saltykov, D. I., Shpetnyi, I. O., Chornous, A. M., Shkurdoda, Yu. O., Kharchenko, A. P., Virchenko, V. I.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 05.09.2021
• Subjects: Giant magnetoresistance; Magnetic films; Magnetic multilayers; magnetoresistance ratio; Metals; Nonhomogeneous media; Resistance; Resistors; spin-dependent scattering; three-layered magnetic film; two-point and resistor model; volume asymmetry parameter
• DOI: 10.1109/NAP51885.2021.9568401

Based on the generalized Dieny formula [1], [2], a theoretical analysis of the dependence of the magnetoresistance ratio \delta, which quantities the effect of giant magnetoresistance (GMR) in a magnetically ordered three-layer film with a thickness D=d_{m1}+d_{n}+d_{m2}, (d_{m1} and d m2 - thickness of the basic and covering magnetic layers of the metal, respectively, d n thickness of the non-magnetic layer), on the thickness of the covering magnetic layer d m2 was performed. It was shown that in the case of performing inequalities d_{m2}\lt \lt (d_{n}+d_{m1}), (d_{m2}\gt \gt (d_{n}+d_{m1})) the value of \delta is negligible due to shunting the resistance of the covering layer with the resistances of the basic layer and the non-magnetic layer (shunting the resistance of the basic layer and the non-magnetic layer with the resistance of the covering magnetic layer). If the equality d_{m2}=(d_{n}+d_{m1}) is met, the value of \delta becomes the maximum (amplitude) value due to the absence of a shunting effect.