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|Type:||Artigo de periódico|
|Title:||THE MAGNETIC-BEHAVIOR IN HETEROGENEOUS FCC CO10CU90 MELT-SPUN RIBBONS|
|Abstract:||The metastable magnetic alloy Co10Cu90 has been prepared by the conventional melt-spinning technique. The rapid solidification process results in an extended solubility of Co in Cu although some Co particles already have precipitated during quenching. In comparison with conventional ageing methods, Joule heating could also be adopted to fabricate granular Co-Cu alloys with even finer Co particles. The finest size of 4.0 nm has been achieved for Co10Cu90 alloy after annealing with a current I = 4 A for 1 min. Single-domain behaviour results in a value of coercivity in excess of 40.0 kA m(-1) for the sample annealed with I = 9.5 A. Below the size of 6.0 nm, Co particles exhibit superparamagnetic behaviour at room temperature, which has been investigated using a superconducting quantum interference device magnetometer. A unique change in M(s) with annealing current or temperature was discovered.|
|Editor:||Taylor & Francis Ltd London|
|Citation:||Philosophical Magazine Letters. Taylor & Francis Ltd London, v. 71, n. 3, n. 193, n. 198, 1995.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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