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Title: High-Frequency Dynamics Modulated by Collective Magnetization Reversal in Artificial Spin Ice

Abstract

Spin-torque ferromagnetic resonance arises in heavy metal-ferromagnet heterostructures when an alternating charge current is passed through the bilayer stack. The methodology to detect the resonance is based on the anisotropic magnetoresistance, which is the change in the electrical resistance due to different orientations of the magnetization. In connected networks of ferromagnetic nanowires, known as artificial spin ice, the magnetoresistance is rather complex owing to the underlying collective behavior of the geometrically frustrated magnetic domain structure. Here, we demonstrate spin-torque ferromagnetic resonance investigations in a square artificial spin-ice system and correlate our observations to magneto-transport measurements. The experimental findings are described using a simulation approach that highlights the importance of the correlated dynamics response of the magnetic system. Here, our results open the possibility of designing reconfigurable microwave oscillators and magnetoresistive devices based on connected networks of nanomagnets.

Authors:
 [1];  [2];  [1];  [2];  [1];  [1];  [3];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
  3. Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States); Yale Univ., New Haven, CT (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1417023
Alternate Identifier(s):
OSTI ID: 1414874
Grant/Contract Number:  
AC02-06CH11357; SC0010778
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Applied
Additional Journal Information:
Journal Volume: 8; Journal Issue: 6; Journal ID: ISSN 2331-7019
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Jungfleisch, Matthias B., Sklenar, Joseph, Ding, Junjia, Park, Jungsik, Pearson, John E., Novosad, Valentine, Schiffer, Peter, and Hoffmann, Axel. High-Frequency Dynamics Modulated by Collective Magnetization Reversal in Artificial Spin Ice. United States: N. p., 2017. Web. doi:10.1103/PhysRevApplied.8.064026.
Jungfleisch, Matthias B., Sklenar, Joseph, Ding, Junjia, Park, Jungsik, Pearson, John E., Novosad, Valentine, Schiffer, Peter, & Hoffmann, Axel. High-Frequency Dynamics Modulated by Collective Magnetization Reversal in Artificial Spin Ice. United States. https://doi.org/10.1103/PhysRevApplied.8.064026
Jungfleisch, Matthias B., Sklenar, Joseph, Ding, Junjia, Park, Jungsik, Pearson, John E., Novosad, Valentine, Schiffer, Peter, and Hoffmann, Axel. 2017. "High-Frequency Dynamics Modulated by Collective Magnetization Reversal in Artificial Spin Ice". United States. https://doi.org/10.1103/PhysRevApplied.8.064026. https://www.osti.gov/servlets/purl/1417023.
@article{osti_1417023,
title = {High-Frequency Dynamics Modulated by Collective Magnetization Reversal in Artificial Spin Ice},
author = {Jungfleisch, Matthias B. and Sklenar, Joseph and Ding, Junjia and Park, Jungsik and Pearson, John E. and Novosad, Valentine and Schiffer, Peter and Hoffmann, Axel},
abstractNote = {Spin-torque ferromagnetic resonance arises in heavy metal-ferromagnet heterostructures when an alternating charge current is passed through the bilayer stack. The methodology to detect the resonance is based on the anisotropic magnetoresistance, which is the change in the electrical resistance due to different orientations of the magnetization. In connected networks of ferromagnetic nanowires, known as artificial spin ice, the magnetoresistance is rather complex owing to the underlying collective behavior of the geometrically frustrated magnetic domain structure. Here, we demonstrate spin-torque ferromagnetic resonance investigations in a square artificial spin-ice system and correlate our observations to magneto-transport measurements. The experimental findings are described using a simulation approach that highlights the importance of the correlated dynamics response of the magnetic system. Here, our results open the possibility of designing reconfigurable microwave oscillators and magnetoresistive devices based on connected networks of nanomagnets.},
doi = {10.1103/PhysRevApplied.8.064026},
url = {https://www.osti.gov/biblio/1417023}, journal = {Physical Review Applied},
issn = {2331-7019},
number = 6,
volume = 8,
place = {United States},
year = {Tue Dec 26 00:00:00 EST 2017},
month = {Tue Dec 26 00:00:00 EST 2017}
}

Journal Article:

Citation Metrics:
Cited by: 28 works
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Figures / Tables:

Figure 1 Figure 1: Experimental setup consisting of a shortened CPW made of Ti/Au with the square ASI made of Py/Pt integrated into the signal arm (S), see inset. A bias-T allows for simultaneous $r f$ -signal transmission and voltage detection by lock-in technique (ST-FMR). A multimeter is used for the MRmore » measurements (two-wire). The lattice constant is given by a, the hole width by b and c = a− b is the bar width. A magnified SEM image is shown in the supplementary material, Fig. S1.« less

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Works referenced in this record:

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Works referencing / citing this record:

Advances in artificial spin ice
journal, November 2019


Magnetization dynamics in artificial spin ice
journal, October 2019


Sculpting the Spin-Wave Response of Artificial Spin Ice via Microstate Selection
text, January 2018


Collective magnetization dynamics in nano-arrays of thin FePd discs
text, January 2019


Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.