Voltage-Induced Ferromagnetic Resonance in Magnetic Tunnel Junctions

Jian Zhu, J. A. Katine, Graham E. Rowlands, Yu-Jin Chen, Zheng Duan, Juan G. Alzate, Pramey Upadhyaya, Juergen Langer, Pedram Khalili Amiri, Kang L. Wang, and Ilya N. Krivorotov
Phys. Rev. Lett. 108, 197203 – Published 9 May 2012
PDFHTMLExport Citation

Abstract

We demonstrate excitation of ferromagnetic resonance in CoFeB/MgO/CoFeB magnetic tunnel junctions (MTJs) by the combined action of voltage-controlled magnetic anisotropy (VCMA) and spin transfer torque (ST). Our measurements reveal that GHz-frequency VCMA torque and ST in low-resistance MTJs have similar magnitudes, and thus that both torques are equally important for understanding high-frequency voltage-driven magnetization dynamics in MTJs. As an example, we show that VCMA can increase the sensitivity of an MTJ-based microwave signal detector to the sensitivity level of semiconductor Schottky diodes.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 31 August 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.197203

© 2012 American Physical Society

Authors & Affiliations

Jian Zhu1, J. A. Katine2, Graham E. Rowlands1, Yu-Jin Chen1, Zheng Duan1, Juan G. Alzate3, Pramey Upadhyaya3, Juergen Langer4, Pedram Khalili Amiri3, Kang L. Wang3, and Ilya N. Krivorotov1

  • 1Department of Physics and Astronomy, University of California, Irvine, California 92697, USA
  • 2Hitachi Global Storage Technologies, 3403 Yerba Buena Road, San Jose, California 95135, USA
  • 3Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA
  • 4Singulus Technologies, 63796 Kahl am Main, Germany

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 108, Iss. 19 — 11 May 2012

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript
Collection
Heating up of Superconductors
January 27, 2017

This collection marks the 30th anniversary of the discovery of high-temperature superconductors. The papers selected highlight some of the advances that have been made to date, both in understanding why these compounds behave in the way they do, and in utilizing them in applications. The papers included in the collection have been made free to read.

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×