Improvement of the interfacial Dzyaloshinskii-Moriya interaction by introducing a Ta buffer layer

N.H. Kim, D.S. Han, J. Jung, J. Cho, J.S. Kim, H.J.M. Swagten, C.Y. You

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

48 Citaten (Scopus)
277 Downloads (Pure)

Samenvatting

We report systematic measurements of the interfacial Dzyaloshinskii-Moriya interaction (iDMI) by employing Brillouin light scattering in Pt/Co/AlOx and Ta/Pt/Co/AlOx structures. By introducing a tantalum buffer layer, the saturation magnetization and the interfacial perpendicular magnetic anisotropy are significantly improved due to the better interface between heavy metal and ferromagnetic layer. From the frequency shift between Stokes- and anti-Stokes spin-waves, we successively obtain considerably larger iDM energy densities (Dmax-=-1.65-±-0.13 mJ/m2 at tCo-=-1.35-nm) upon adding the Ta buffer layer, despite the nominally identical interface materials. Moreover, the energy density shows an inverse proportionality with the Co layer thickness, which is the critical clue that the observed iDMI is indeed originating from the interface between the Pt and Co layers.

Originele taal-2Engels
Artikelnummer142408
Pagina's (van-tot)1-4
TijdschriftApplied Physics Letters
Volume107
Nummer van het tijdschrift14
DOI's
StatusGepubliceerd - 5 okt 2015

Vingerafdruk

Duik in de onderzoeksthema's van 'Improvement of the interfacial Dzyaloshinskii-Moriya interaction by introducing a Ta buffer layer'. Samen vormen ze een unieke vingerafdruk.

Citeer dit