Title :
Magnetoresistance of granular metal-oxide thin films
Author :
Stahl, B. ; Ghafari, M. ; Gomez-Escoto, R. ; Hahn, H.
Author_Institution :
Dept. of Mater. Sci., Tech. Univ. Darmstadt, Germany
fDate :
9/1/1999 12:00:00 AM
Abstract :
The magneto-transport properties of granular films consisting of ultrafine metal and metal-oxide particles containing Fe, Ni, B and O have been studied between 4 and 300 K. As a function of temperature, the films show a transition from a poorly conducting to a metallic state at 260 K. This change in the transport mechanism is also reflected in the different magnetoresistance behavior for low and high temperatures
Keywords :
discontinuous metallic thin films; giant magnetoresistance; iron; magnetic multilayers; nickel compounds; tunnelling; 4 to 300 K; Fe-NiBO; Mossbauer spectra; bilayers; electron hopping; giant magnetoresistance; granular metal-oxide thin films; high temperatures; low temperatures; magneto-transport properties; metal-oxide particles; multilayers; nanostructured oxides; spin dependent tunnelling; structural model; ultrafine metal particles; Conductive films; Electrons; Giant magnetoresistance; Iron; Magnetic properties; Materials science and technology; Sputtering; Temperature; Transistors; Tunneling magnetoresistance;
Journal_Title :
Magnetics, IEEE Transactions on
