Abstract
Abstract Rhombohedral Zr 2 Co 11 -based materials have shown very promising magnetic properties, but this rhombohedral phase is elusive and metastable. In this study, nanocrystalline Zr 2 Co 11 films were obtained by magnetron co-sputtering on Si (100) substrate with the in-situ annealing. Temperature dependence of magnetic domain structure and magnetic properties of nanocrystalline Zr 2 Co 11 have been investigated. Proper in-situ annealing temperature enhances the content of hard magnetic phase and improves the magnetic properties. Compared with Zr 2 Co 11 thin films grown at low temperature (823 K) and higher temperatures, thin films with in-situ annealing temperature of 1023 K have coercivity B c ( B c = μ 0 H c ) of 0.15 T and energy product BH max of 16.0 kJ/m 3 . Magnetic Force Microscopy images show the highest bright-dark magnetic domain contrast with highest root-mean-square values of the phase shift for thin film with in-situ annealing temperature of 1023 K. These findings have correlated magnetic domain structure and magnetic properties of Zr 2 Co 11 thin films, and elaborated the effect of different in-situ annealing temperatures on magnetic domain structure.
Published Version
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