Magnetic and ordering behavior of Nb-doped FePt alloy films
Magnetic and ordering behavior of Nb-doped FePt alloy films
- 주제(키워드) FePt alloy film , Nb-doping , magnetic properties , ordering transformation , microstructure , FePt alloy film , Nb-doping , magnetic properties , ordering transformation , microstructure
- 발행기관 한국자기학회
- 발행년도 2005
- 총서유형 Journal
- UCI G704-000190.2005.10.1.003
- KCI ID ART000951920
초록/요약
The magnetic properties and ordering behavior of Nb-doped FePt alloy films prepared by dc-magnetron sputtering were investigated. It was foundthat Nb addition retarded the ordering reaction from the disordered face-centered-cubic (fcc) A1 phase to the ordered face-centered-tetragonal (fct) L10 phase. The tetragonality (c/a ratio) of the ordered fct L10 phase increased with the Nb concentration. Nb addition hampered c-axis contraction during ordering, probably because the larger Nb atoms occupy Pt sites. Consequently, the coercivity and magnetocrystalline anisotropic energy of Nb-doped FePt alloy films are lower than those of un-doped FePt film under equivalent annealing conditions.
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