Effect of heating and cooling rates in annealing for preparation of L10-FePt nanoparticles on Si substrate

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Abstract

In order to obtain highly ordered L10-FePt nanoparticles for hard disk drive applications, the L10-phase transformation of chemically synthesized FePt nanoparticles deposited on a naturally oxidized Si substrate was investigated using rapid thermal annealing. The heating and cooling rates during annealing were changed logarithmically with a constant annealing temperature (800°C) and holding time (10 min). Almost completely ordered L10-FePt nanoparticles were confirmed by grazing incidence X-ray diffraction measurements, irrespective of the heating and cooling rates, and the amount of the silicide changed in response to both. Nearly pure L10-FePt was obtained when rapid heating (more than 780 K/min) and rapid cooling (more than 290 K/min) were applied. L10-FePt degraded into Fe3Si and PtSi when the cooling rate was lower than 7.8 K/min. Rapid heating as well as rapid cooling of FePt nanoparticles can provide a facile route for the high-throughput production of L10-FePt-based high-density magnetic recording media.

Original languageEnglish
Pages (from-to)P217-P222
JournalECS Journal of Solid State Science and Technology
Volume8
Issue number4
DOIs
Publication statusPublished - 2019 Jan 1

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Annealing
Nanoparticles
Cooling
Heating
Substrates
Magnetic recording
Rapid thermal annealing
Hard disk storage
Phase transitions
Throughput
X ray diffraction
Temperature

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

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title = "Effect of heating and cooling rates in annealing for preparation of L10-FePt nanoparticles on Si substrate",
abstract = "In order to obtain highly ordered L10-FePt nanoparticles for hard disk drive applications, the L10-phase transformation of chemically synthesized FePt nanoparticles deposited on a naturally oxidized Si substrate was investigated using rapid thermal annealing. The heating and cooling rates during annealing were changed logarithmically with a constant annealing temperature (800°C) and holding time (10 min). Almost completely ordered L10-FePt nanoparticles were confirmed by grazing incidence X-ray diffraction measurements, irrespective of the heating and cooling rates, and the amount of the silicide changed in response to both. Nearly pure L10-FePt was obtained when rapid heating (more than 780 K/min) and rapid cooling (more than 290 K/min) were applied. L10-FePt degraded into Fe3Si and PtSi when the cooling rate was lower than 7.8 K/min. Rapid heating as well as rapid cooling of FePt nanoparticles can provide a facile route for the high-throughput production of L10-FePt-based high-density magnetic recording media.",
author = "Yoshiki Fujihira and Toru Asahi and Toshiyuki Momma and Tetsuya Osaka",
year = "2019",
month = "1",
day = "1",
doi = "10.1149/2.0221903jss",
language = "English",
volume = "8",
pages = "P217--P222",
journal = "ECS Journal of Solid State Science and Technology",
issn = "2162-8769",
publisher = "Electrochemical Society, Inc.",
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TY - JOUR

T1 - Effect of heating and cooling rates in annealing for preparation of L10-FePt nanoparticles on Si substrate

AU - Fujihira, Yoshiki

AU - Asahi, Toru

AU - Momma, Toshiyuki

AU - Osaka, Tetsuya

PY - 2019/1/1

Y1 - 2019/1/1

N2 - In order to obtain highly ordered L10-FePt nanoparticles for hard disk drive applications, the L10-phase transformation of chemically synthesized FePt nanoparticles deposited on a naturally oxidized Si substrate was investigated using rapid thermal annealing. The heating and cooling rates during annealing were changed logarithmically with a constant annealing temperature (800°C) and holding time (10 min). Almost completely ordered L10-FePt nanoparticles were confirmed by grazing incidence X-ray diffraction measurements, irrespective of the heating and cooling rates, and the amount of the silicide changed in response to both. Nearly pure L10-FePt was obtained when rapid heating (more than 780 K/min) and rapid cooling (more than 290 K/min) were applied. L10-FePt degraded into Fe3Si and PtSi when the cooling rate was lower than 7.8 K/min. Rapid heating as well as rapid cooling of FePt nanoparticles can provide a facile route for the high-throughput production of L10-FePt-based high-density magnetic recording media.

AB - In order to obtain highly ordered L10-FePt nanoparticles for hard disk drive applications, the L10-phase transformation of chemically synthesized FePt nanoparticles deposited on a naturally oxidized Si substrate was investigated using rapid thermal annealing. The heating and cooling rates during annealing were changed logarithmically with a constant annealing temperature (800°C) and holding time (10 min). Almost completely ordered L10-FePt nanoparticles were confirmed by grazing incidence X-ray diffraction measurements, irrespective of the heating and cooling rates, and the amount of the silicide changed in response to both. Nearly pure L10-FePt was obtained when rapid heating (more than 780 K/min) and rapid cooling (more than 290 K/min) were applied. L10-FePt degraded into Fe3Si and PtSi when the cooling rate was lower than 7.8 K/min. Rapid heating as well as rapid cooling of FePt nanoparticles can provide a facile route for the high-throughput production of L10-FePt-based high-density magnetic recording media.

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DO - 10.1149/2.0221903jss

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JF - ECS Journal of Solid State Science and Technology

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