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Dergiler / 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
Sayfa
1217–1223
Yayın Tarihi
2018-10-11
DOI
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⚡ TL;DR(1 Cümlede Hızlı Çıkarım)

The promising ferromagnetic properties of the FePt nanoparticles after annealing under high pressure make them suitable for ultrahigh-density memory devices.

📌 3 Maddede Bu Makale

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Amaç & Hipotez: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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Temel Bulgular & Veri:As-synthesized nanoparticles are around 4.5 nm and show superparamagnetic behavior at 300 K.
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Sonuç & Katkı:The promising ferromagnetic properties of the FePt nanoparticles after annealing under high pressure make them suitable for ultrahigh-density memory devices.
🔬Tür:Araştırma Makalesi
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler: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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Bu Makaleye Atıf Yap

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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