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Journals / Turkish Journal of Chemistry / 2018 / Cilt: 42 - Sayı: 5

Phase transition of chemically synthesized FePt nanoparticles under high pressure

Telem ŞİMŞEK
Özgür KARCI
Şadan ÖZCAN
Pages
1217–1223
Publication Date
2018-10-11
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Results show that high-pressure annealing lowers the decomposition temperature of the surfactants surrounding nanoparticles and partially hinders agglomeration arising from heat treatment.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:We present the results of a study related to phase transformation of chemically synthesized FePt nanoparticles under high pressure from face-centered cubic into face-centered tetragonal structure.
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Key Findings & Data:As-synthesized nanoparticles are around 4.5 nm and show superparamagnetic behavior at 300 K.
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Conclusion & Impact:Results show that high-pressure annealing lowers the decomposition temperature of the surfactants surrounding nanoparticles and partially hinders agglomeration arising from heat treatment.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Chemical method · iron-platinum nanoparticles · magnetic data storage

Abstract

We present the results of a study related to phase transformation of chemically synthesized FePt nanoparticles under high pressure from face-centered cubic into face-centered tetragonal structure. As-synthesized nanoparticles are around 4.5 nm and show superparamagnetic behavior at 300 K. After annealing under 60 bar pressure of hydrogen at 400 ∘∘^{\circ}C for 2 h, nanoparticles exhibit strong ferromagnetic behavior with 5391 Oe coercivity. Results show that high-pressure annealing lowers the decomposition temperature of the surfactants surrounding nanoparticles and partially hinders agglomeration arising from heat treatment. The promising ferromagnetic properties of the FePt nanoparticles after annealing under high pressure make them suitable for ultrahigh-density memory devices.

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Cite This Article

ŞİMŞEK, T., KARCI, Ö., ÖZCAN, Ş. (2018). Phase transition of chemically synthesized FePt nanoparticles under high pressure. Turkish Journal of Chemistry, Cilt: 42 - Sayı: 5, 1217–1223. https://ajindex.com/articles/184263

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