The Effect of Silver on Permanent Magnet Properties of Iron and Palladium Alloys

Masumoto, Hakaru; Watanabe, Kiyoshi

doi:10.2320/matertrans1960.24.139

Cited by 1 publication

(1 citation statement)

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“…The observed two-phase nanocomposite was considered to consist of a partly alloyed L1 0 -FePd phase and a residual ␣-Fe after alloying and atomic ordering reactions. It has been reported for the bulk Fe-Pd alloy that the phase separation of ␣-Fe and L1 0 -FePd from the disordered Fe-Pd alloy obtained after water quenching from 1273 K requires a long annealing time of more than 360 ks at 873 K. 24,25 These results suggest that it is not easy to obtain the ␣-Fe/ L1 0 -FePd nanocomposite structure using a eutectoid reaction.…”

Section: Resultsmentioning

confidence: 97%

Fabrication of exchange-coupled α-Fe∕L1-FePd nanocomposite isolated particles

Kawamura

Sato

Hirotsu

2004

Journal of Applied Physics

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Exchange-coupled nanocomposite magnets (NCMs) consisting of hard and soft magnetic phases have attracted much attention as novel permanent magnets. We previously succeeded in fabrication of L1 0-FePd/α-Fe NCMs by the reductive annealing of Pd/γ-Fe 2 O 3 heterostructured nanoparticles. Herein we explain the structural optimization of L1 0-FePd/α-Fe NCMs by adjusting the volume fraction of hard/soft phases and the temperature of reductive annealing to obtain large maximum energy products ((BH) max). The sample with a hard/soft volume ratio of 82/18 formed by annealing at 773 K had the largest (BH) max = 10.3 MGOe. In these L1 0-FePd/α-Fe NCMs with the large (BH) max , the interface between the hard and soft phases was coherent and the phase sizes were optimized, both of which effectively induced exchange coupling. This exchange coupling was directly observed by visualizing the magnetic interaction between the hard and soft phases using a first-order reversal curve (FORC) diagram. KEY WORDS nanocomposite magnet, L1 0-FePd/α-Fe, heterostructured nanoparticle, maximum energy product, first-order reversal curve diagram @@@@@@@@@@@@@@@@@ 53% 1% 1 1)

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Section: Resultsmentioning

confidence: 97%