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
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...
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
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
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
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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