publication . Other literature type . Article . 2018

Ion irradiation-induced easy-cone anisotropy in double-MgO free layers for perpendicular magnetic tunnel junctions

Nikolai A. Sobolev; Nikolai A. Sobolev; B. M. S. Teixeira; Eduardo Alves; A. A. Timopheev; N. Caçoilo; Bernard Dieny; Stéphane Auffret; Ricardo C. Sousa;
Open Access English
  • Published: 14 May 2018
  • Publisher: Zenodo
Abstract
We have used the ferromagnetic resonance in the X-band (9.37 GHz) to investigate the effect of 400 keV Ar+ irradiation on the perpendicular magnetic anisotropy (PMA) and Gilbert damping parameter, α, of double-MgO free layers designed for application in perpendicular magnetic tunnel junctions. The samples comprised a MgO/Fe72Co8B20/X(0.2 nm)/Fe72Co8B20/MgO layer stack, where X stands for an ultrathin Ta or W spacer. Samples with two different total FeCoB layer thicknesses, tFCB = 3.0 nm and tFCB = 2.6 nm, were irradiated with ion fluences ranging from 1012 cm−2 to 1016 cm−2. The effective first-order PMA field, BK1, decreased nearly linearly with the logarithm o...
Subjects
free text keywords: Physics and Astronomy (miscellaneous), [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], Thin films, Magnetic anisotropy, Ion radiation effects, Magnetic tunnel junctions, Fluence, Magnetization, Ion, Condensed matter physics, Ferromagnetic resonance, Anisotropy, Materials science, Irradiation, Perpendicular, Spintronics
Funded by
EC| SPINMULTIFILM
Project
SPINMULTIFILM
Physical principles of the creation of novel SPINtronic materials on the base of MULTIlayered metal-oxide FILMs for magnetic sensors and MRAM
  • Funder: European Commission (EC)
  • Project Code: 778308
  • Funding stream: H2020 | MSCA-RISE
,
EC| MAGICAL
Project
MAGICAL
CMOS/magnetoelectronic Integrated Circuits wil Multifunctional Capabilities
  • Funder: European Commission (EC)
  • Project Code: 669204
  • Funding stream: H2020 | ERC | ERC-ADG
,
FCT| UID/CTM/50025/2013
Project
UID/CTM/50025/2013
Institute of Nanostructures, Nanomodelling and Nanofabrication
  • Funder: Fundação para a Ciência e a Tecnologia, I.P. (FCT)
  • Project Code: 147333
  • Funding stream: 5876
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