NDLI: Formation and strain distribution of Ni/NiO core/shell magnetic nanoparticles fabricated by pulsed laser deposition

Content Provider	Springer Nature Link
Author	Yuan, CaiLei Zhang, QiuLong Luo, XingFang Zhang, ZhenRong
Copyright Year	2011
Abstract	Nucleation and growth lead to substantial strain in nanoparticles embedded in a host matrix. The distribution of strain field plays an important role in the physical properties of nanoparticles. Magnetic Ni/NiO core/shell nanoparticles embedded in the amorphous Al$_{2}$O$_{3}$ matrix were fabricated by pulsed laser deposition. The results from a high-resolution transmission electron microscope also revealed that the core/shell nanoparticles consist of a single crystal Ni core with a faced-centered cubic structure (Space Group FM-3M) and polycrystalline NiO shell with a trigonal/rhombohedral structure (Space Group R-3mH). The growth strain of Ni/NiO core/shell nanoparticles embedded in the Al$_{2}$O$_{3}$ matrix was investigated. Finite element calculations clearly indicate that the NiO shell incurs large compressive strain. The compressive strain existing at the NiO shell area enables the shell material at the interface to adapt to the lattice parameters of Ni core. This process results in a relatively good crystallinity near the interface, which may be associated with the higher exchange coupling between the ferromagnetic Ni core and antiferromagnetic NiO shell.
Starting Page	1254
Ending Page	1257
Page Count	4
File Format	PDF
ISSN	16747348
Journal	Science in China Series G
Volume Number	54
Issue Number	7
e-ISSN	18691927
Language	English
Publisher	SP Science China Press
Publisher Date	2011-05-27
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	magnetic nanoparticles strain transmission electron microscope Astronomy, Observations and Techniques Classical Continuum Physics Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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