journal article·2018-05-01Open access

Effect of external magnetic field on locking range of spintronic feedback nano oscillator

Hanuman Singh, K. Konishi, A. Bose, S. Bhuktare, S. Miwa, A. Fukushima, K. Yakushiji, S. Yuasa, H. Kubota, Y. Suzuki, A. A. Tulapurkar

AIP Advances· Volume 8· Issue 5

Abstract

In this work we have studied the effect of external applied magnetic field on the locking range of spintronic feedback nano oscillator. Injection locking of spintronic feedback nano oscillator at integer and fractional multiple of its auto oscillation frequency was demonstrated recently. Here we show that the locking range increases with increasing external magnetic field. We also show synchronization of spintronic feedback nano oscillator at integer (n=1,2,3) multiples of auto oscillation frequency and side band peaks at higher external magnetic field values. We have verified experimental results with macro-spin simulation using similar conditions as used for the experimental study.
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Research context

OpenAlex topics: Magnetic properties of thin films · Quantum and electron transport phenomena · Molecular Junctions and Nanostructures

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Electrical Engineering, Indian Institute of Technology Bombay 1 , Powai, Mumbai 400 076, India

Graduate School of Engineering Science, Osaka University 2 , Toyonaka, Osaka 560-8531, Japan

National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center 3 , Ibaraki 305-8568, Japan

Funding

Ministry of Electronics and Information technology

References (28)

Show source-provided references
1. Current-driven excitation of magnetic multilayers10.1016/0304-8853(96)00062-5 ↗
2. Microwave oscillations of a nanomagnet driven by a spin-polarized current10.1038/nature01967 ↗
3. Proposal for a domain wall nano-oscillator driven by non-uniform spin currents10.1038/srep14647 ↗
4. Nonlinear auto-oscillator theory of microwave generation by spin polarized current10.1109/tmag.2008.2009935 ↗
5. Spin-torque oscillator based on magnetic tunnel junction with a perpendicularly magnetized free layer and in-plane magnetized polarizer10.7567/apex.6.103003 ↗
6. Extremely coherent microwave emission from spin torque oscillator stabilized by phase locked loop10.1038/srep18134 ↗
7. Observation of thermally driven field-like spin torque in magnetic tunnel junctions10.1063/1.4958833 ↗
8. Spintroics oscillator based on magnetic field feedback10.1063/1.4752008 ↗
9. Coherent microwave generation by spintronic feedback oscillator10.1038/srep30747 ↗
10. Fractional synchronization of spin-torque nano-oscillators10.1103/physrevlett.105.104101 ↗
11. Injection locking of tunnel junction oscillators to a microwave current10.1063/1.3587575 ↗
12. Synchronization of spin-transfer oscillators driven by stimulated microwave currents10.1103/physrevb.73.060409 ↗
13. Synchronization of spin Hall nano-oscillators to external microwave signals
14. Large microwave generation from current-driven magnetic vortex oscillators in magnetic tunnel junctions10.1038/ncomms1006 ↗
15. Spin torque oscillator frequency versus magnetic field angle: The prospect of operation beyond 65 GHz10.1063/1.3097238 ↗
16. Spin torque oscillators and RF currents modulation, locking, and ringing10.1080/10584587.2011.574478 ↗
17. Mutually synchronized bottom-up multi-nano contact spin-torque oscillators10.1038/ncomms3731 ↗
18. Long-range mutual synchronization of spin Hall nano-oscillators
19. Injection locking and phase control of spin transfer oscillators10.1103/physrevlett.95.067203 ↗
20. Mutual phase-locking of microwave spin torque nano-oscillators10.1038/nature04035 ↗
21. Time required to injection lock spin torque nanoscale oscillators10.1063/1.4821179 ↗
22. Phase locking of vortex based spin transfer oscillators to a microwave current10.1063/1.3565159 ↗
23. Self-injection locking of a vortex spin torque oscillator by delayed feedback10.1038/srep26849 ↗
24. Integer fractional and side band injection locking of spintronic feedback nano oscillator to microwave signal
25. Tulapurkar, spintronic oscillator based on spin-current feedback using the spin Hall effect10.1103/physrevapplied.7.014022 ↗
26. Sensitive measurement of spin orbit torque driven ferromagnetic resonance detected by planar Hall geometry10.1063/1.4999948 ↗
27. Current-driven spin torque induced by the Rashba effect in a ferromagnetic metal layer10.1038/nmat2613 ↗
28. Sign reversal of field like spin orbit torque in ultrathin Chromium/Nickel bi-layer