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

Journal Article · · Physical Review Applied
 [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)

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.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357; SC0010778
OSTI ID:
1417023
Alternate ID(s):
OSTI ID: 1414874
Journal Information:
Physical Review Applied, Vol. 8, Issue 6; ISSN 2331-7019
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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Cited By (4)

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 (6)


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