Synthesis of a High-Coercivity FePt–Ag Nanocomposite Magnet via Block Copolymer-Templated Self-Assembly
Joint Authors
Wakayama, Hiroaki
Yonekura, Hirotaka
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-5, 5 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-11-15
Country of Publication
Egypt
No. of Pages
5
Main Subjects
Abstract EN
Magnetic recording media are composed of magnetic thin films consisting of magnetically isolated crystallites.
For practical use of magnetic particles as recording media, it will be necessary to realize high coercivity by fabricating nanocrystalline grains and forming grain boundaries with the nonmagnetic phase.
In this study, a high-coercivity FePt–Ag nanocomposite magnet was synthesized by means of block copolymer-templated self-assembly.
Precursors of Fe, Pt, and Ag were introduced into a polymer block, and the resulting material was oxidized and then reduced to form a nanocomposite consisting of FePt nanoparticles surrounded by a matrix of Ag.
X-ray diffraction analysis revealed that the introduction of Ag did not significantly affect the crystalline ordering of the FePt.
The addition of Ag increased the coercivity by 53% (from 11.1 to 17.0 kOe).
Our results suggest that the grain boundaries of the nonmagnetic Ag metal acted as pinning sites, disrupting magnetic coupling between individual FePt nanocrystallites and hindering domain wall motion at an external magnetic field.
American Psychological Association (APA)
Wakayama, Hiroaki& Yonekura, Hirotaka. 2017. Synthesis of a High-Coercivity FePt–Ag Nanocomposite Magnet via Block Copolymer-Templated Self-Assembly. Journal of Nanomaterials،Vol. 2017, no. 2017, pp.1-5.
https://search.emarefa.net/detail/BIM-1182853
Modern Language Association (MLA)
Wakayama, Hiroaki& Yonekura, Hirotaka. Synthesis of a High-Coercivity FePt–Ag Nanocomposite Magnet via Block Copolymer-Templated Self-Assembly. Journal of Nanomaterials No. 2017 (2017), pp.1-5.
https://search.emarefa.net/detail/BIM-1182853
American Medical Association (AMA)
Wakayama, Hiroaki& Yonekura, Hirotaka. Synthesis of a High-Coercivity FePt–Ag Nanocomposite Magnet via Block Copolymer-Templated Self-Assembly. Journal of Nanomaterials. 2017. Vol. 2017, no. 2017, pp.1-5.
https://search.emarefa.net/detail/BIM-1182853
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1182853