The microstructure morphology of Nd90-x FexAl10 (x = 35 - 50) ribbons, obtained by melt spinning at two surface wheel velocities, was investigated by atomic force microscopy. A direct dependence of microstructure homogeneity on both production parameters and Nd content was evidenced. In particular high surface wheel velocity promotes an amorphous structure while low Nd content promotes grain formation. At the same time, the temperature dependence of magnetization, in field cooled and zero field cooled samples, shows the coexistence of short-range spin glass-like interactions and long-range ferromagnetic order, which are also coherent with the morphologic characteristics. (C) 2003 Elsevier Science B.V. All rights reserved.
Consistency between morphology and magnetization data in studying the effect of production parameters in Nd90-X FeX Al10 (X=35-50) melt spun ribbons / Ausanio, Giovanni; H., Chiriac; Iannotti, Vincenzo; C., Hison; Lanotte, Luciano; N., Lupu. - In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - ISSN 0304-8853. - STAMPA. - 265:2(2003), pp. 138-141. [10.1016/S0304-8853(03)00241-5]
Consistency between morphology and magnetization data in studying the effect of production parameters in Nd90-X FeX Al10 (X=35-50) melt spun ribbons
AUSANIO, GIOVANNI;IANNOTTI, VINCENZO;LANOTTE, LUCIANO;
2003
Abstract
The microstructure morphology of Nd90-x FexAl10 (x = 35 - 50) ribbons, obtained by melt spinning at two surface wheel velocities, was investigated by atomic force microscopy. A direct dependence of microstructure homogeneity on both production parameters and Nd content was evidenced. In particular high surface wheel velocity promotes an amorphous structure while low Nd content promotes grain formation. At the same time, the temperature dependence of magnetization, in field cooled and zero field cooled samples, shows the coexistence of short-range spin glass-like interactions and long-range ferromagnetic order, which are also coherent with the morphologic characteristics. (C) 2003 Elsevier Science B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
