Effect of added Cu on disorder-order transformation of L1/sub 0/-FePt

Maeda, Takeshi; Kikitsu, Akira; Kai, Tadashi; Nagase, T.; Aikawa, H.; Akiyama, Junichi

doi:10.1109/tmag.2002.803105

Cited by 44 publications

(22 citation statements)

References 9 publications

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“…A well defined 20 wt.% Pt/C precursor powder of 2.1 (±1) nm Pt size was first made using a literature method [23] Appropriate amounts of the precursor salts were added to the suspension, as listed in Table 1.…”

Section: 1mentioning

confidence: 99%

“…In this section the addition of Cu to the Pt and Fe based catalyst is investigated in order to identify whether tetragonal PtFe type alloys can be formed at lower T a s. This concept has been reported for the purpose of the preparation of magnetic recording devices [22,23]. The latter studies were carried out for thin films.…”

Section: Xrd Characterization Of As-synthesized Pt 575 Fe 575 Cu/c mentioning

confidence: 99%

“…Pt x Fe y /C catalysts have shown enhanced orr activities over other Pt based catalysts [6,10], and the Pt x plus Fe y system has the potential to form a variety of alloy structures [21]. Research, carried out on thin films, has further shown that the combination of Pt, Fe and small amounts of Cu allows for the formation of an ordered alloy phase at lower annealing temperatures than observed for Pt and Fe only [22,23].…”

Section: Introductionmentioning

confidence: 99%

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Ordered alloy formation for Pt3Fe/C, PtFe/C and Pt5.75Fe5.75Cuy/CO2-reduction electro-catalysts

Chen

Bock

Mercier

et al. 2012

Electrochimica Acta

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10. 1016/j.electacta.2012.05.103 Electrochimica Acta, 77, pp. 212-224, 2012-06-09 Ordered alloy formation for Pt3Fe/C, PtFe/C and Pt5.75Fe5.75Cuy/CO2-reduction electro-catalysts Chen, L.; Bock, C.; Mercier, P. H. J.; Macdougall, B. R. alloy structure. The activity towards the orr was measured after 70 potential cycling, which can cause beneficial changes to the catalysts. In case of the specific orr activity, a dependence on the catalyst series is observed as follows:

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Section: 1mentioning

confidence: 99%

Section: Xrd Characterization Of As-synthesized Pt 575 Fe 575 Cu/c mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ordered alloy formation for Pt3Fe/C, PtFe/C and Pt5.75Fe5.75Cuy/CO2-reduction electro-catalysts

Chen

Bock

Mercier

et al. 2012

Electrochimica Acta

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“…To explore the mechanism of enhanced ordering, detailed kinetics was recently investigated by differential scanning calorimetry (DSC) [20,21], X-ray diffraction (XRD) techniques [6,[22][23][24][25], and transmission electron microscopy (TEM) [26,27]. The temperature-time-transformation (TTT) curves for FePt thin films and nano-particles [28] were also worked out via a series of experiments and computations.…”

Section: Introductionmentioning

confidence: 99%

Early-stage ordering in in-situ annealed Fe51Pt49 films

Hsiao

Chen

Chin

et al. 2009

Journal of Magnetism and Magnetic Materials

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“…Several methods of decreasing the ordering temperature have been reported: e.g., the addition of a third element such as B, Sb and Cu to FePt films, [1][2][3] employment of a multilayer film consisting of Fe and Pt followed by annealing, 4) and annealing in high-pressure gas. 5) It has been shown to be possible to lower the starting temperature of ordering to about 623 K. Figure 1 shows the results of decreasing the ordering temperature by adding B to CoPt.…”

Section: Decrease Of Ordering Temperaturementioning

confidence: 99%

FePt Magnetic Recording Media: Problems and Possibilities for Practical Use

Shibata

2003

Mater. Trans.

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FePt with ordered L1 0 structure is a promising material for high-density magnetic recording media because the material has high magnetic anisotropy energy. The film is considered to show excellent thermal stability. However, the practical use of FePt media is hindered by several problems that must be solved, i.e. decrease of ordering temperature, realization of films with perpendicular magnetic anisotropy, reduction of media noise, and development of writing methods of bits on high-coercive-force media. Among these problems, the former two problems are being resolved, but the problems associated with reducing media noise and developing writing methods still remain unsolved. It is expected that these problems will be solved by introducing new ideas or methods. Hereafter it will be important to form double-layer perpendicular magnetic recording media and to estimate the read and write characteristics of the media.

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Effect of added Cu on disorder-order transformation of L1/sub 0/-FePt

Cited by 44 publications

References 9 publications

Ordered alloy formation for Pt3Fe/C, PtFe/C and Pt5.75Fe5.75Cuy/CO2-reduction electro-catalysts

Ordered alloy formation for Pt3Fe/C, PtFe/C and Pt5.75Fe5.75Cuy/CO2-reduction electro-catalysts

Early-stage ordering in in-situ annealed Fe51Pt49 films

FePt Magnetic Recording Media: Problems and Possibilities for Practical Use

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