Magnetic response of hybrid ferromagnetic and antiferromagnetic core-shell nanostructures

被引：21

作者：

Khan, U. ^{[1
]}

Li, W. J. ^{[1
]}

Adeela, N. ^{[2
]}

Irfan, M. ^{[1
]}

Javed, K. ^{[1
]}

Wan, C. H. ^{[1
]}

Riaz, S. ^{[1
]}

Han, X. F. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Univ Punjab, Ctr High Energy Phys, Lahore, Pakistan

来源：

NANOSCALE | 2016年 / 8卷 / 11期

基金：

中国国家自然科学基金;

关键词：

EXCHANGE BIAS; ILMENITE; NANOWIRES;

D O I：

10.1039/c5nr07946b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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) over bar. Transmission electron microscopy clearly depicts better morphology of nanostructures with shell thicknesses of similar to 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 (T-N = 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.

引用

页码：6064 / 6070

页数：7

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