Issue 11, 2016
From the journal:

Nanoscale

Magnetic response of hybrid ferromagnetic and antiferromagnetic core–shell nanostructures†

U. Khan,a   W. J. Li,a   N. Adeela,b   M. Irfan,a   K. Javed,a   C. H. Wan,a   S. Riaza  and  X. F. Han*a  

* Corresponding authors

a Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
E-mail: xfhan@iphy.ac.cn, usman_cssp@yahoo.com

b Centre for high energy physics, university of the Punjab, Lahore, Pakistan

Abstract

The synthesis of FeTiO3–Ni(Ni80Fe20) core–shell nanostructures by a two-step method (sol–gel and DC electrodeposition) has been demonstrated. XRD analysis confirms the rhombohedral crystal structure of FeTiO3(FTO) with space group R[3 with combining macron]. Transmission electron microscopy clearly depicts better morphology of nanostructures with shell thicknesses of ∼25 nm. Room temperature magnetic measurements showed significant enhancement of magnetic anisotropy for the permalloy (Ni80Fe20)–FTO over Ni–FTO core–shell nanostructures. Low temperature magnetic measurements of permalloy–FeTiO3 core–shell structure indicated a strong exchange bias mechanism with magnetic coercivity below the antiferromagnetic Neel temperature (TN = 59 K). The exchange bias is attributed to the alignment of magnetic moments in the antiferromagnetic material at low temperature. Our scheme opens a path towards optimum automotive systems and wireless communications wherein broader bandwidths and smaller sizes are required.

Graphical abstract: Magnetic response of hybrid ferromagnetic and antiferromagnetic core–shell nanostructures

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Article information

DOI
https://doi.org/10.1039/C5NR07946B
Article type
Paper
Submitted
11 Nov 2015
Accepted
08 Jan 2016
First published
14 Jan 2016

Nanoscale, 2016,8, 6064-6070

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Magnetic response of hybrid ferromagnetic and antiferromagnetic core–shell nanostructures

U. Khan, W. J. Li, N. Adeela, M. Irfan, K. Javed, C. H. Wan, S. Riaz and X. F. Han, Nanoscale, 2016, 8, 6064 DOI: 10.1039/C5NR07946B

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