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Electronic Structures Localized at the Boron Atom in Amorphous Fe-B and Fe-B-P Alloys

1989; Institute of Physics; Volume: 28; Issue: 11R Linguagem: Inglês

10.1143/jjap.28.2234

1347-4065

Hidehiro Yasuda, Hiroshi Nakayama, Hiroshi Fujita,

Magnetic Properties of Alloys

The electronic structures localized at the B in amorphous Fe-B and Fe-B-P alloys and their crystallized alloys were studied by Auger valence electron spectroscopy and the states of solute B are discussed based on the change in the degree of covalent bonding and the charge transfer between the Fe and B atoms. In amorphous phases, the charge transfers from Fe to B above 15at%B where B atoms occupy the substitutionallike situations, and from B to Fe below 15at%B where B atoms occupy the interstitiallike situations. Magnetic properties depend on such states of solute B. In crystalline phases, covalent bonding becomes dominant because the electron excitation occurs to the B2p state. Consequently, amorphous phases are more metallic in character than crystalline phases and amorphous structures are stabilized by a mixture of more than two different bonding states.