CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume 9931 > Article
Presentation
4 November 2016 Determination of the Dzyaloshinskii Moriya interaction for various hetero-structure (Conference Presentation)
Chun-Yeol You
Author Affiliations +
Proceedings Volume 9931, Spintronics IX; 99313S (2016) https://doi.org/10.1117/12.2237109
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States
Abstract
We investigated non-reciprocal spin wave (SW) dispersion relations by using Brillouin Light Scattering (BLS) in inversion symmetry breaking heterostructures. The non-reciprocal SW dispersion relation is a fingerprint of the existence of asymmetric exchange coupling, Dzyaloshinskii-Moriya Interaction (DMI). The quantification of DMI is important, because it is an essential ingredient of the domain wall motion and skyrmion based logic devices. We obtained DMI energy densities of various NM1/ferromagnetic(Co, CoFeB)/NM2 structures, where NM1,2 are non-magnetic heavy metals (Pt, Ir, Ta) or insulators (MgO, AlOx). We revealed that DMI is proportional to the inverse of ferromagnetic layer thickness, which strong evidence of interface nature of DMI in the heterostructure. In order to exclude the possible source of non-reciprocal SW dispersions, we carefully examined DMI with three independent measurement methods, field strength dependence, SW wave vector magnitude dependence, and SW propagating angle dependences, and found all three measurements gave the same results. It implies our measurement results are more reliable compared with other methods. We also found that sign and strength are sensitive function of materials, interface qualities, layer orders, and annealing conditions. Since the strong spin-orbit coupling (SOC) between ferromagnetic and the heavy metal layers is a source DMI, we also investigated SOC related quantities such as perpendicular magnetic anisotropy, magneto-optical Kerr effect, and spin pumpings. And we found that the relation between SOC and DMI is not the same with other SOC-related physical quantities.
Conference Presentation
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Chun-Yeol You "Determination of the Dzyaloshinskii Moriya interaction for various hetero-structure (Conference Presentation)", Proc. SPIE 9931, Spintronics IX, 99313S (4 November 2016); https://doi.org/10.1117/12.2237109
ACCESS THE FULL ARTICLE
ORGANIZATIONAL
Sign in with credentials provided by your organization.
INSTITUTIONAL
Select your institution to access the SPIE Digital Library.
SELECT YOUR INSTITUTION
PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
PERSONAL SIGN IN
No SPIE Account? Create one
PURCHASE THIS CONTENT
SUBSCRIBE TO DIGITAL LIBRARY
50 downloads per 1-year subscription
Members: $195
Non-members: $335 ADD TO CART
25 downloads per 1 - year subscription
Members: $145
Non-members: $250 ADD TO CART
PURCHASE SINGLE ARTICLE
Includes PDF, HTML & Video, when available
Members: $17.00
Non-members: $21.00 ADD TO CART
PROCEEDINGS
 PRESENTATION
WATCH
PRESENTATION SAVE TO MY LIBRARY
GET CITATION
Advertisement
Advertisement
KEYWORDS
System on a chip
Ferromagnetics
Heterojunctions
Interfaces
Metals
Dielectrics
Light scattering
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top