Low-temperature synthesis of oriented CoPtCu-MgO and CoFePt-Ag-SiO₂ nanocomposite thin films by rf-magnetron sputtering

Sato, Kazuhisa; Kosaka, Tamotsu; Konno, Toyohiko J.

Journal of the Ceramic Society of Japan, 2014, 122(1425), 317-321

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Identifier to cite or link to this item: https://hdl.handle.net/11094/89418

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Title
Low-temperature synthesis of oriented CoPtCu-MgO and CoFePt-Ag-SiO₂ nanocomposite thin films by rf-magnetron sputtering
Creator
NRID
1000070314424 1000070314424
ORCID
0000-0001-9078-2541 0000-0001-9078-2541
researchmap permalink
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Scopus Author ID
55552977400 55552977400
CreatorName
Sato, Kazuhisa
CreatorName
Kosaka, Tamotsu
NRID
1000090260447 1000090260447
CreatorName
Konno, Toyohiko J.
Subject
CoPtCu–MgO
CoFePt–Ag–SiO₂
Kinetic ordering temperature
Nanoparticle
Sputtering
Transmission electron microscopy
Description
Kazuhisa SATO, Tamotsu KOSAKA, Toyohiko J. KONNO, Low-temperature synthesis of oriented CoPtCu–MgO and CoFePt–Ag–SiO₂ nanocomposite thin films by rf-magnetron sputtering, Journal of the Ceramic Society of Japan, 2014, 122, 1425, p. 317-321.
Abstract
Nanocomposite thin films composed of oriented Co₅₀Pt₄₄Cu₆ nanoparticles embedded in a MgO matrix has been synthesized by rf-magnetron co-sputtering onto NaCl(001) substrates kept at 620 K. As the sputtering power increases, (001) orientation is improved and atomic ordering is also promoted. However, superlattice reflections are quite weak and the ordered region is limited in local area of the nanoparticles, indicating low degree of order. Electron diffraction and elemental mapping revealed that additive Cu is alloyed with CoPt. We have also fabricated (Co₂₆Fe₂₀)Pt₄₄Ag₁₀SiO₂ nanocomposite thin films at 675K for comparison. Atomic ordering is promoted by Fe and Ag addition as well as higher substrate temperature; however, it was found that ternary element (Cu, Ag, Fe) addition into CoPt alloy is not so effective to promote atomic ordering. Origin of the slow ordering kinetics is discussed using thermodynamical parameters. © 2014 The Ceramic Society of Japan. All rights reserved.
Publisher
The Ceramic Society of Japan
Source Title
Journal of the Ceramic Society of Japan
Volume (Issue)
122(1425)
Page
317-321
Date of Issued
2014-05
Language
English
Handle URL
https://hdl.handle.net/11094/89418
PISSN
18820743
eISSN
13486535
NCID
AA12229489
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.2109/jcersj2.122.317
Access Rights
open access
CopyRight
© 2014 The Ceramic Society of Japan
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article