Thermal annealing effects on the interfacial Dzyaloshinskii-Moriya interaction energy density and perpendicular magnetic anisotropy

Jaehun Cho, Nam Hui Kim, Jinyong Jung, Dong Soo Han, Henk J.M. Swagten, June Seo Kim, Chun Yeol You

Research output: Contribution to journalArticleAcademicpeer-review

6 Citations (Scopus)

Abstract

We investigate the interfacial Dzyaloshinskii-Moriya interaction (iDMI) and the perpendicular magnetic anisotropy (PMA) in the annealed inversion symmetry breaking structures (Pt/Co (CoFeB)/AlO x and Ta/CoFeB/AlO x) by Brillouin light scattering. The iDMI energy density of Pt/Co and Pt/CoFeB samples decreases while increasing annealing temperature, but the iDMI energy density of Ta/CoFeB sample slightly increases by increasing annealing temperature. By applying the thermal annealing process, PMA energies slightly increase at the Pt/Co interface; however, Pt/CoFeB, (Ta/CoFeB) structures are dramatically decreased (increased) by the annealing process. The effects of the annealing show complicate variation for iDMI and PMA for each structure; however, we find overall weak correlations between iDMI and PMA despite different materials and annealing process.

Original languageEnglish
Article number8325402
JournalIEEE Transactions on Magnetics
Volume54
Issue number6
DOIs
Publication statusPublished - Jun 2018

Keywords

  • Brillouin light scattering (BLS)
  • interfacial Dzyaloshinskii-Moriya interaction (iDMI)
  • perpendicular magnetic anisotropy (PMA)

Fingerprint

Dive into the research topics of 'Thermal annealing effects on the interfacial Dzyaloshinskii-Moriya interaction energy density and perpendicular magnetic anisotropy'. Together they form a unique fingerprint.

Cite this