DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Analysis of ultrafast magnetization switching dynamics in exchange-coupled ferromagnet–ferrimagnet heterostructures

Abstract

Magnetization switching in ferromagnets has so far been limited to the current-induced spin–orbit–torque effects. Recent observation of helicity-independent all-optical magnetization switching (HI-AOS) in an exchange-coupled ferromagnet–ferrimagnet (FM-FEM) heterostructures expanded the range and applicability of such ultrafast heat-driven magnetization switching. Here we report the element-resolved HI-AOS dynamics of such an exchange-coupled system, using a modified microscopic three-temperature model. We have studied the effect of (i) the Curie temperature of the FM, (ii) FEM composition, (iii) the long-range Ruderman–Kittel–Kasuya–Yosida (RKKY) exchange-coupling strength, and (iv) the absorbed optical energy on the element-specific time-resolved magnetization dynamics. The phase-space of magnetization illustrates how the RKKY coupling strength and the absorbed optical energy influence the switching time. Our analysis demonstrates that the threshold switching energy depends on the composition of the FEM and the switching time depends on the Curie temperature of the FM as well as RKKY coupling strength. Importantly, this simulation anticipates new insights into developing faster and more energy-efficient spintronics devices.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3];  [1]
  1. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  2. Interuniversity Microelectronics Centre (IMEC), Leuven (Belgium)
  3. Seoul National Univ. (Korea, Republic of)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
2228600
Alternate Identifier(s):
OSTI ID: 1968924
Grant/Contract Number:  
AC02-05CH11231; AC02-05-CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Magnetism and Magnetic Materials
Additional Journal Information:
Journal Volume: 574; Journal ID: ISSN 0304-8853
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ultrafast magnetization switching; RKKY exchange coupling; spintronics; helicity independent all optical switching; ferromagnet

Citation Formats

Polley, Debanjan, Chatterjee, Jyotirmoy, Jang, Hyejin, and Bokor, Jeffrey. Analysis of ultrafast magnetization switching dynamics in exchange-coupled ferromagnet–ferrimagnet heterostructures. United States: N. p., 2023. Web. doi:10.1016/j.jmmm.2023.170680.
Polley, Debanjan, Chatterjee, Jyotirmoy, Jang, Hyejin, & Bokor, Jeffrey. Analysis of ultrafast magnetization switching dynamics in exchange-coupled ferromagnet–ferrimagnet heterostructures. United States. https://doi.org/10.1016/j.jmmm.2023.170680
Polley, Debanjan, Chatterjee, Jyotirmoy, Jang, Hyejin, and Bokor, Jeffrey. Sat . "Analysis of ultrafast magnetization switching dynamics in exchange-coupled ferromagnet–ferrimagnet heterostructures". United States. https://doi.org/10.1016/j.jmmm.2023.170680. https://www.osti.gov/servlets/purl/2228600.
@article{osti_2228600,
title = {Analysis of ultrafast magnetization switching dynamics in exchange-coupled ferromagnet–ferrimagnet heterostructures},
author = {Polley, Debanjan and Chatterjee, Jyotirmoy and Jang, Hyejin and Bokor, Jeffrey},
abstractNote = {Magnetization switching in ferromagnets has so far been limited to the current-induced spin–orbit–torque effects. Recent observation of helicity-independent all-optical magnetization switching (HI-AOS) in an exchange-coupled ferromagnet–ferrimagnet (FM-FEM) heterostructures expanded the range and applicability of such ultrafast heat-driven magnetization switching. Here we report the element-resolved HI-AOS dynamics of such an exchange-coupled system, using a modified microscopic three-temperature model. We have studied the effect of (i) the Curie temperature of the FM, (ii) FEM composition, (iii) the long-range Ruderman–Kittel–Kasuya–Yosida (RKKY) exchange-coupling strength, and (iv) the absorbed optical energy on the element-specific time-resolved magnetization dynamics. The phase-space of magnetization illustrates how the RKKY coupling strength and the absorbed optical energy influence the switching time. Our analysis demonstrates that the threshold switching energy depends on the composition of the FEM and the switching time depends on the Curie temperature of the FM as well as RKKY coupling strength. Importantly, this simulation anticipates new insights into developing faster and more energy-efficient spintronics devices.},
doi = {10.1016/j.jmmm.2023.170680},
journal = {Journal of Magnetism and Magnetic Materials},
number = ,
volume = 574,
place = {United States},
year = {Sat Apr 01 00:00:00 EDT 2023},
month = {Sat Apr 01 00:00:00 EDT 2023}
}

Works referenced in this record:

Transient ferromagnetic-like state mediating ultrafast reversal of antiferromagnetically coupled spins
journal, March 2011


Progress toward picosecond on-chip magnetic memory
journal, April 2022

  • Polley, Debanjan; Pattabi, Akshay; Chatterjee, Jyotirmoy
  • Applied Physics Letters, Vol. 120, Issue 14
  • DOI: 10.1063/5.0083897

The role of intermixing in all-optical switching of synthetic-ferrimagnetic multilayers
journal, December 2019

  • Beens, M.; Lalieu, M. L. M.; Duine, R. A.
  • AIP Advances, Vol. 9, Issue 12
  • DOI: 10.1063/1.5129892

Comparing Ultrafast Demagnetization Rates Between Competing Models for Finite Temperature Magnetism
journal, May 2013


Pathways for Single-Shot All-Optical Switching of Magnetization in Ferrimagnets
journal, February 2020


Ultrafast Double Pulse All-Optical Reswitching of a Ferrimagnet
journal, April 2021


Spin–orbit torque switching of a ferromagnet with picosecond electrical pulses
journal, October 2020


Unifying femtosecond and picosecond single-pulse magnetic switching in Gd-Fe-Co
journal, March 2021


Role of element-specific damping in ultrafast, helicity-independent, all-optical switching dynamics in amorphous (Gd,Tb)Co thin films
journal, January 2021


Engineering Single-Shot All-Optical Switching of Ferromagnetic Materials
journal, November 2020


Oscillatory coupling between ferromagnetic layers separated by a nonmagnetic metal spacer
journal, September 1991


Modeling ultrafast all-optical switching in synthetic ferrimagnets
journal, June 2017


Explaining the paradoxical diversity of ultrafast laser-induced demagnetization
journal, December 2009

  • Koopmans, B.; Malinowski, G.; Dalla Longa, F.
  • Nature Materials, Vol. 9, Issue 3
  • DOI: 10.1038/nmat2593

Spin-orbit enhanced demagnetization rate in Co/Pt-multilayers
journal, November 2014

  • Kuiper, K. C.; Roth, T.; Schellekens, A. J.
  • Applied Physics Letters, Vol. 105, Issue 20
  • DOI: 10.1063/1.4902069

THz-driven demagnetization with perpendicular magnetic anisotropy: towards ultrafast ballistic switching
journal, February 2018

  • Polley, Debanjan; Pancaldi, Matteo; Hudl, Matthias
  • Journal of Physics D: Applied Physics, Vol. 51, Issue 8
  • DOI: 10.1088/1361-6463/aaa863

Role of non-thermal electrons in ultrafast spin dynamics of ferromagnetic multilayer
journal, April 2020


Single-Shot Multi-Level All-Optical Magnetization Switching Mediated by Spin Transport
journal, October 2018


Spin torque switching of 20 nm magnetic tunnel junctions with perpendicular anisotropy
journal, March 2012

  • Gajek, M.; Nowak, J. J.; Sun, J. Z.
  • Applied Physics Letters, Vol. 100, Issue 13
  • DOI: 10.1063/1.3694270

Unifying Ultrafast Magnetization Dynamics
journal, December 2005


Picosecond optospintronic tunnel junctions
journal, June 2022

  • Wang, Luding; Cheng, Houyi; Li, Pingzhi
  • Proceedings of the National Academy of Sciences, Vol. 119, Issue 24
  • DOI: 10.1073/pnas.2204732119

Single shot ultrafast all optical magnetization switching of ferromagnetic Co/Pt multilayers
journal, July 2017

  • Gorchon, Jon; Lambert, Charles-Henri; Yang, Yang
  • Applied Physics Letters, Vol. 111, Issue 4
  • DOI: 10.1063/1.4994802

Ultrafast magnetization dynamics rates within the Landau-Lifshitz-Bloch model
journal, October 2011


Ultrafast Spin Dynamics in Multisublattice Magnets
journal, January 2012


Ultrafast heating as a sufficient stimulus for magnetization reversal in a ferrimagnet
journal, January 2012

  • Ostler, T. A.; Barker, J.; Evans, R. F. L.
  • Nature Communications, Vol. 3, Issue 1
  • DOI: 10.1038/ncomms1666

Oscillatory magnetic exchange coupling through thin copper layers
journal, April 1991


NTMpy: An open source package for solving coupled parabolic differential equations in the framework of the three-temperature model
journal, August 2021

  • Alber, Lukas; Scalera, Valentino; Unikandanunni, Vivek
  • Computer Physics Communications, Vol. 265
  • DOI: 10.1016/j.cpc.2021.107990

Single-shot all-optical switching of magnetization in Tb/Co multilayer-based electrodes
journal, March 2020


Single pulse all-optical toggle switching of magnetization without gadolinium in the ferrimagnet Mn2RuxGa
journal, September 2020


RKKY Exchange Bias Mediated Ultrafast All‐Optical Switching of a Ferromagnet
journal, November 2021

  • Chatterjee, Jyotirmoy; Polley, Debanjan; Pattabi, Akshay
  • Advanced Functional Materials, Vol. 32, Issue 8
  • DOI: 10.1002/adfm.202107490

Spin-orbit torque switching of magnetic tunnel junctions for memory applications
journal, November 2022

  • Krizakova, Viola; Perumkunnil, Manu; Couet, Sébastien
  • Journal of Magnetism and Magnetic Materials, Vol. 562
  • DOI: 10.1016/j.jmmm.2022.169692