Local control of magnetic damping in ferromagnetic/non-magnetic bilayers by interfacial intermixing induced by focused ion-beam irradiation

被引：27

作者：

King, J. A. ^{[1
]}

Ganguly, A. ^{[2
,3
]}

Burn, D. M. ^{[1
]}

Pal, S. ^{[2
,3
]}

Sallabank, E. A. ^{[1
]}

Hase, T. P. A. ^{[4
]}

Hindmarch, A. T. ^{[1
]}

Barman, A. ^{[2
,3
]}

Atkinson, D. ^{[1
]}

机构：

[1] Univ Durham, Dept Phys, Durham DH1 3LE, England

[2] SN Bose Natl Ctr Basic Sci, Themat Unit Excellence Nanodevice Technol, Kolkata 700098, India

[3] SN Bose Natl Ctr Basic Sci, Dept Condensed Matter Phys & Mat Sci, Kolkata 700098, India

[4] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

来源：

APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 24期

基金：

英国工程与自然科学研究理事会;

关键词：

THIN-FILMS; IMPLANTATION; DYNAMICS; DOPANTS;

D O I：

10.1063/1.4883860

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The influence of interfacial intermixing on the picosecond magnetization dynamics of ferromagnetic/non-magnetic thin-film bilayers was studied. Low-dose focused-ion-beam irradiation was used to induce intermixing across the interface between a 10 nm Ni81Fe19 layer and a 2-3 nm capping layer of either Au or Cr. Time-resolved magneto-optical Kerr effect was used to study magnetization dynamics as a function of ion-beam dose. With an Au cap, the damping of the un-irradiated bilayer was comparable with native Ni81Fe19 and increased with increasing ion dose. In contrast, for Ni81Fe19/Cr the damping was higher than that for native Ni81Fe19, but the damping decreased with increasing dose. (C) 2014 AIP Publishing LLC.

引用

页数：5

共 37 条

[1] Study of focused-ion-beam-induced structural and compositional modifications in nanoscale bilayer systems by combined grazing incidence x ray reflectivity and fluorescence [J].