Angular dependence of the magnetic properties of permalloy and nickel nanowires as a function of their diameters

RAVIOLO, SOFÍA; TEJO, FELIPE; BAJALES, NOELIA; ESCRIG, JUAN

Materials Research Express

IOP Publishing

Año: 2018 vol. 5 p. 1 - 1

n this paper we have compared the angular dependence of the magnetic properties of permalloy(Ni80Fe20) and nickel nanowires by means of micromagnetic simulations. For each material we havechosen two diameters, 40 and 100 nm. Permalloy nanowires with smaller diameters(d = 40 nm)exhibit greater coercivity than nickel nanowires, regardless of the angle at which the external magneticfield is applied. In addition, both Py and Ni nanowires exhibit the same remanence values. However,the nanowires of larger diameters(d = 100 nm) exhibit a more complex behavior, noting that forsmall angles, nickel nanowires are those that now exhibit a greater coercivity in comparison to those ofpermalloy. The magnetization reversal modes vary as a function of the angle at which the external fieldis applied. When the field is applied parallel to the wire axis, it reverts through nucleation andpropagation of domain walls, whereas when the field is applied perpendicular to the axis, it reverts by apseudo-coheren