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Title: Asymmetric spin-wave dispersion due to Dzyaloshinskii-Moriya interaction in an ultrathin Pt/CoFeB film

Abstract

Employing Brillouin spectroscopy, strong interfacial Dzyaloshinskii-Moriya interactions have been observed in an ultrathin Pt/CoFeB film. Our micromagnetic simulations show that spin-wave nonreciprocity due to asymmetric surface pinning is insignificant for the 0.8 nm-thick CoFeB film studied. The observed high asymmetry of the monotonic spin wave dispersion relation is thus ascribed to strong Dzyaloshinskii-Moriya interactions present at the Pt/CoFeB interface. Our findings should further enhance the significance of CoFeB as an important material for magnonic and spintronic applications.

Authors:
; ; ; ;  [1]; ;  [2]
  1. Department of Physics, National University of Singapore, Singapore 117551 (Singapore)
  2. Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576 (Singapore)
Publication Date:
OSTI Identifier:
22420255
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ASYMMETRY; COBALT COMPOUNDS; DISPERSION RELATIONS; IRON BORIDES; PLATINUM; SIMULATION; SPECTROSCOPY; SPIN WAVES; THIN FILMS

Citation Formats

Di, Kai, Zhang, Vanessa Li, Lim, Hock Siah, Ng, Ser Choon, Kuok, Meng Hau, E-mail: phykmh@nus.edu.sg, Qiu, Xuepeng, and Yang, Hyunsoo, E-mail: eleyang@nus.edu.sg. Asymmetric spin-wave dispersion due to Dzyaloshinskii-Moriya interaction in an ultrathin Pt/CoFeB film. United States: N. p., 2015. Web. doi:10.1063/1.4907173.
Di, Kai, Zhang, Vanessa Li, Lim, Hock Siah, Ng, Ser Choon, Kuok, Meng Hau, E-mail: phykmh@nus.edu.sg, Qiu, Xuepeng, & Yang, Hyunsoo, E-mail: eleyang@nus.edu.sg. Asymmetric spin-wave dispersion due to Dzyaloshinskii-Moriya interaction in an ultrathin Pt/CoFeB film. United States. doi:10.1063/1.4907173.
Di, Kai, Zhang, Vanessa Li, Lim, Hock Siah, Ng, Ser Choon, Kuok, Meng Hau, E-mail: phykmh@nus.edu.sg, Qiu, Xuepeng, and Yang, Hyunsoo, E-mail: eleyang@nus.edu.sg. Mon . "Asymmetric spin-wave dispersion due to Dzyaloshinskii-Moriya interaction in an ultrathin Pt/CoFeB film". United States. doi:10.1063/1.4907173.
@article{osti_22420255,
title = {Asymmetric spin-wave dispersion due to Dzyaloshinskii-Moriya interaction in an ultrathin Pt/CoFeB film},
author = {Di, Kai and Zhang, Vanessa Li and Lim, Hock Siah and Ng, Ser Choon and Kuok, Meng Hau, E-mail: phykmh@nus.edu.sg and Qiu, Xuepeng and Yang, Hyunsoo, E-mail: eleyang@nus.edu.sg},
abstractNote = {Employing Brillouin spectroscopy, strong interfacial Dzyaloshinskii-Moriya interactions have been observed in an ultrathin Pt/CoFeB film. Our micromagnetic simulations show that spin-wave nonreciprocity due to asymmetric surface pinning is insignificant for the 0.8 nm-thick CoFeB film studied. The observed high asymmetry of the monotonic spin wave dispersion relation is thus ascribed to strong Dzyaloshinskii-Moriya interactions present at the Pt/CoFeB interface. Our findings should further enhance the significance of CoFeB as an important material for magnonic and spintronic applications.},
doi = {10.1063/1.4907173},
journal = {Applied Physics Letters},
number = 5,
volume = 106,
place = {United States},
year = {Mon Feb 02 00:00:00 EST 2015},
month = {Mon Feb 02 00:00:00 EST 2015}
}