Structure and Magnetoresistive Properties of Thee-layer Film Systems Based on Permalloy and Copper

Abstract

Structural and phase composition and magnetoresistive properties of three-layer film systems based on permalloy and copper are investigated. The samples are obtained by the method of layer by layer condensation followed by heat treatment in the 300-700 K temperature range. It is shown that the spin-dependent electron scattering is realized in the layer thickness range of dCu 6-15 nm and dPy 25-40 nm for as-deposited and annealed at 400 K samples. It is established that the maximum isotropic magnetoresistance is observed after annealing of the samples at 400 K, and annealing at 550 K leads to the emergence of anisotropic magnetoresistance.

Structural-Phase State and Magnetotransport Properties of Thin Film Alloys Based on Permalloy and Copper

“…To date, a large number of experimental results of the study of magnetic and magnetoresistive properties of multilayers and multilayer film systems based on permalloy (Py) and Cu [17][18][19][20]. Py and Cu-based film systems are widely used due to certain unique features  low values of coercivity and saturation magnetization [1], thermal stability [19,20], high sensitivity to the magnetic field [18].…”

“…To date, a large number of experimental results of the study of magnetic and magnetoresistive properties of multilayers and multilayer film systems based on permalloy (Py) and Cu [17][18][19][20]. Py and Cu-based film systems are widely used due to certain unique features  low values of coercivity and saturation magnetization [1], thermal stability [19,20], high sensitivity to the magnetic field [18]. Due to these properties, magnetic film systems have found practical application in biomedical technologies in the manufacture of biosensors [1], in automobile electronics [1], in spintronics in the manufacture of sensitive elements of magnetic field sensors [2], magnetic transducers, magnetoresistive random access memory [21].…”