Magnetic properties and structure of Fe–Pt–M–B (M = Zr, Nb and Ti) alloys produced by quenching technique

The L1 0–FePt nanocrystalline phase is directly formed by the rapid quenching of the (Fe 0.55Pt 0.45)–M–B (M = Zr, Nb and Ti) alloy melt. The as-quenched alloys exhibit coercivity higher than 200 kA/m. The direct formation of L1 0–FePt takes place at the compositional range where the equilibrium dis...

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Bibliographic Details
Published in:Journal of alloys and compounds 2007-05, Vol.434, p.614-617
Main Authors: Makino, Akihiro, Bitoh, Teruo, Inoue, Akihisa, Hirotu, Yoshihiko
Format: Article
Language:English
Subjects:
Calorimetry
Liquid quenching
Magnetic measurements
Nanostructures
Permanent magnets
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Summary:The L1 0–FePt nanocrystalline phase is directly formed by the rapid quenching of the (Fe 0.55Pt 0.45)–M–B (M = Zr, Nb and Ti) alloy melt. The as-quenched alloys exhibit coercivity higher than 200 kA/m. The direct formation of L1 0–FePt takes place at the compositional range where the equilibrium disordered fcc phase disappears by decreasing of melting temperature into the L1 0–FePt phase stable region with simultaneous addition of the M elements and B, presumably because of the strong interaction of Pt–M pairs.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2006.08.092