Observation of twin-related order domains in CuFePt2

Shahmiri, Mandana Roodbari; Vaughan, David J.; Murphy, Samuel T.

doi:10.1002/pssa.2210950106

Cited by 7 publications

(2 citation statements)

References 7 publications

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“…5 and 6). Tulameenite forms two solid solution series, one with ferronickelplatinum (Pt 2 FeNi; Rudashevsky et al 1983) and another with PtFe (Shahmiri et al 1986;Bowles 1990;Nixon et al 1990). The ideal scheme of element substitutions requires an atomic Pt/(Fe + Cu + Ni) ratio of 1.0 for the members of the Pt 2 FeCu-PtFe series although nonstoichiometric PGE-rich members have been reported (e.g., Tolstykh et al 2002;Barkov et al 2005).…”

Section: Pt-fe-cu Alloysmentioning

confidence: 99%

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Weathering of PGE sulfides and Pt–Fe alloys in the Freetown Layered Complex, Sierra Leone

et al. 2017

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Fresh and weathered rocks and saprolite from Horizon B of the Freetown Layered Complex contain platinum-group minerals (PGM). The PGM in the fresh rocks are 1-7 μm across, including cooperite (PtS), isoferroplatinum (Pt 3 Fe), minor tetraferroplatinum (PtFe), tulameenite (Pt 2 FeCu), Os-bearing laurite (RuS 2 ), and other base metalsulfide (BMS)-bearing PGM. The weathered rocks contain fewer of those PGM but a high proportion of disordered Cu-(±Pd)-bearing Pt-Fe alloys. The saprolite hosts scarce, smaller (1-3 μm) ordered PtFe and disordered PtFe 3 . The PtFe alloys became increasingly Fe rich as weathering proceeded. Pt-Fe oxides appeared during weathering. Copper sulfides associated with the primary PGM and cooperite (with <3% Pd) were destroyed to provide the minor Cu and Pd found in some of the disordered Pt-Fe alloys. Platinum-and Pd-bearing saprolites have retained the original rock fabric and, to a depth of about 2 m, surround residual rocks that show progressive weathering (corestones). Ground water passing through the saprolite has transported Pt and Pd (and probably Au) in solution down slope into saprolite over unmineralized rocks. Transport is marked by changes in the Pt/Pd ratio indicating that the metals have moved independently. Palladium is present in marginally higher concentrations in the deeper saprolite than in the corestones suggesting some retention of Pd in the deeper saprolite. Platinum and Pd are less concentrated in the upper saprolite than the deeper saprolite indicating surface leaching. Alteration occurred over a long period in an organic and microbial rich environment that may have contributed to the leaching and transport of PGE.

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Section: Pt-fe-cu Alloysmentioning

confidence: 99%

“…Tulameenite (Pt 2 FeCu) is also tetragonal (P4/mmm). Quenched synthetic tulameenite adapts to disordering of the structure by multiple twinning showing fine herring-bone twinning or broader, parallel twins and dislocations (Shahmiri et al 1986). …”

Section: Crystal Structures In the System Pt-fementioning

confidence: 99%

Weathering of PGE sulfides and Pt–Fe alloys in the Freetown Layered Complex, Sierra Leone

et al. 2017

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Multi‐Objective Optimization for Rapid Identification of Novel Compound Metals for Interconnect Applications

Ramdas,

Zhou,

et al. 2024

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Interconnect materials play the critical role of routing energy and information in integrated circuits. However, established bulk conductors, such as copper, perform poorly when scaled down beyond 10 nm, limiting the scalability of logic devices. Here, a multi‐objective search is developed, combined with first‐principles calculations, to rapidly screen over 15,000 materials and discover new interconnect candidates. This approach simultaneously optimizes the bulk electronic conductivity, surface scattering time, and chemical stability using physically motivated surrogate properties accessible from materials databases. Promising local interconnects are identified that have the potential to outperform ruthenium, the current state‐of‐the‐art post‐Cu material, and also semi‐global interconnects with potentially large skin depths at the GHz operation frequency. The approach is validated on one of the identified candidates, CoPt, using both ab initio and experimental transport studies, showcasing its potential to supplant Ru and Cu for future local interconnects.

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Cu-Fe-Pt (Copper-Iron-Platinum)

2007

Landolt-Börnstein - Group IV Physical Chemistry

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Observation of twin-related order domains in CuFePt2

Cited by 7 publications

References 7 publications

Weathering of PGE sulfides and Pt–Fe alloys in the Freetown Layered Complex, Sierra Leone

Weathering of PGE sulfides and Pt–Fe alloys in the Freetown Layered Complex, Sierra Leone

Multi‐Objective Optimization for Rapid Identification of Novel Compound Metals for Interconnect Applications

Cu-Fe-Pt (Copper-Iron-Platinum)

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