Oscillating magnetoresistance in ion beam sputtered Co/Ir multilayers

• Published in: Journal of magnetism and magnetic materials 1999-06, Vol.198, p.67-69
• Main Authors: Dinia, A, Stoffel, M, Rahmouni, K, Schmerber, G, van den Berg, H.A.M
• Format: Article
• Language: English
• Subjects: Applied sciences; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Electronic transport phenomena in thin films and low-dimensional structures; Exact sciences and technology; Galvanomagnetic and other magnetotransport effects (including thermomagnetic effects); Interfacial magnetic properties (multilayers, magnetic quantum wells, superlattices, magnetic heterostructures); Magnetic properties and materials; Magnetic properties of surface, thin films and multilayers; Metals. Metallurgy; Oscillating magnetoresistance; Physics; Sputtered multilayers
• ISSN: 0304-8853
• DOI: 10.1016/S0304-8853(98)00624-6

We report on the magnetoresistance measurements of a series of ion beam sputtered Co/Ir multilayers. The magnetoresistance show an oscillating behaviour as a function of the Ir thickness with a period of about 1 nm. The first AFM peak has been observed at the 0.6 nm thick Ir spacer layer and its strength corresponds to J AF= −2 erg/cm 2 at 300 K. This interlayer coupling is large and presents a very strong temperature dependence to reach approximately −6 erg/cm 2 at 4.2 K. This variation is attributed to the strong intermixing at the Co/Ir interfaces.