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Indexed by:期刊论文

Date of Publication:2012-01-15

Journal:PHYSICA B-CONDENSED MATTER

Included Journals:SCIE、EI

Volume:407

Issue:2

Page Number:250-257

ISSN No.:0921-4526

Key Words:Metallic glasses; Fe-B; Short-range order; Magnetic properties; Electronic properties

Abstract:The structural, electronic, and magnetic properties of amorphous Fe100-xBx alloys (x=9, 17, 25, 27.3, 33.3, 36.3) are investigated using first-principles calculations. In these amorphous alloys, the short-range order is manifested as a series of Fe- or B-centered polyhedra such as tricapped trigonal prism, icosahedron, and bcc-like structural unit. The electron densities of states of the amorphous alloys resemble those of crystalline Fe borides, which further confirm the similarity of the local order in the amorphous and crystalline phases. All B atoms carry small negative moments of about -0.1 mu(B), while small negative moments are also found on very few Fe sites for the Fe-rich compositions (x=9, 17). The average magnetic moment per Fe atom decreases nonlinearly with increasing B composition, which can be associated with the nonlinear relationship between mass density and composition. (C) 2011 Elsevier B.V. All rights reserved.