STRUCTURE AND FORMATION MECHANISM OP NANOGRANULAR COCU FILMS

摘要

Magnetic nanosized materials that are based on transition metals may be divided into six main groups: films with columnar crystal structure, multilayers, granular or so-called inhomogeneous alloyed films, nano-crystalline films, and nanowires. All of these can be produced in a variety of forms by electrodeposition and some of them (e.g. nanowires) may be prepared exclusively by electrochemical means. Among magnetic electrode-posited films, which represent nano-inclusions of a ferromagnetic material (Co, Fe, Ni) in a diamagnetic (e,g. Cu) or paramagnetic (e.g. Re) matrix, are extremely promising because of their potential for practical applications as materials that exhibit giant magnetoresistance (GMR). The value of the GMR depends on the size of magnetic clusters and the sharpness of the transition between the nanocluster and the matrix. The latter are regulated by the regimes of electrodeposition. In this report, we discuss the formation and structure of nanogranular CoCu films.