Magnetic properties and electronic structure
of Co1-xCux granular films
A. El Amiri1*, K. Chafai2, H. Lassri2, M. Abid1, E.K. Hlil3, L. Bessais4
1LPTA, Université Hassan II - Casablanca, Faculté des Sciences, B.P. 5366 Maârif, Maroc
2LPMMAT, Université Hassan II - Casablanca, Faculté des Sciences, B.P. 5366 Maârif, Maroc
3Institut Néel, CNRS et Université Joseph Fourier, BP 166, F-38042 Grenoble cedex 9, France
4ICMPE-CMTR, UMR CNRS 7182, 2-8, rue H. Dunant, 94320 Thiais, France
Received: 10 September 2013; revised version accepted: 23 January 2014
Magnetic properties and electronic structure of Co1-xCux granular films are investigated, which have been prepared by RF sputtering. Magnetization when expressed in terms of the total sample volume shows a linear decrease as x increase. The coercivity is about 17 Oe at x=0.2, starts increasing for x>0.3, and shows a maximum value of 100Oe for x=0.5. In addition, self-consistent ab initio calculations, based on Korringa-Kohn-Rostocker (KKR), are performed to investigate both electronic and magnetic properties. These calculations include spin polarized potential within the framework of the Coherent Potential Approximation (CPA).
Keywords: CoCu granular films; Magnetization; First principle calculations.