Voltage-driven multistability and chaos in magnetic films

Susana Contreras-Celada, Marcel G. Clerc, Saliya Coulibaly, René G. Rojas, Alejandro O. Leon

Research output: Contribution to journalArticlepeer-review

Abstract

The control of magnetization dynamics has allowed numerous technological applications. Magnetization dynamics can be excited by, e.g., alternating magnetic fields, charge and spin currents, and a voltage-induced control of interfacial properties. An example of the last mechanism is the voltage-controlled magnetic anisotropy effect, which can induce magnetization precessions and switchings with low-power consumption. Time-dependent voltage-controlled magnetic anisotropy can induce complex dynamic behaviors for magnetization. This work studies the magnetization dynamics of a single magnetic nano-oscillator forced with a time-dependent voltage-controlled magnetic anisotropy. Unexpectedly, the oscillator displays multistable regimes, i.e., distinct initial conditions evolve towards different oscillatory states. When voltage is changed the oscillatory state exhibits period-doubling route to chaos. The chaotic behavior is numerically demonstrated by the determination of the largest Lyapunov exponent.

Original languageEnglish
Article number169793
JournalJournal of Magnetism and Magnetic Materials
Volume562
DOIs
StatePublished - 15 Nov 2022
Externally publishedYes

Keywords

  • Chaos
  • Dynamical systems
  • Landau–lifshitz equation
  • Magnetization dynamics
  • Nano-oscillators
  • Voltage-controlled magnetic anisotropy

Fingerprint

Dive into the research topics of 'Voltage-driven multistability and chaos in magnetic films'. Together they form a unique fingerprint.

Cite this