Terahertz frequency spectrum analysis with a nanoscale antiferromagnetic tunnel junction

@article{Artemchuk2020TerahertzFS,
  title={Terahertz frequency spectrum analysis with a nanoscale antiferromagnetic tunnel junction},
  author={Petro Yu. Artemchuk and O. R. Sulymenko and Steven Louis and J. Li and Roman Khymyn and Elena N. Bankowski and Thomas J. Meitzler and Vasyl Tyberkevych and Andrei N. Slavin and Oleksandr V. Prokopenko},
  journal={Journal of Applied Physics},
  year={2020}
}
A method to perform spectrum analysis on low power signals between 0.1 and 10 THz is proposed. It utilizes a nanoscale antiferromagnetic tunnel junction (ATJ) that produces an oscillating tunneling anisotropic magnetoresistance, whose frequency is dependent on the magnitude of an evanescent spin current. It is first shown that the ATJ oscillation frequency can be tuned linearly with time. Then, it is shown that the ATJ output is highly dependent on matching conditions that are highly dependent… 

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References

SHOWING 1-10 OF 42 REFERENCES
Terahertz-Frequency Signal Source Based on an Antiferromagnetic Tunnel Junction
We propose a novel type of terahertz-frequency (TF) signal source based on an antiferromagnetic tunnel junction (ATJ), where the generated ac signal is extracted through the variations of the
Antiferromagnetic THz-frequency Josephson-like Oscillator Driven by Spin Current
TLDR
It is demonstrated theoretically that aBi-layer of a heavy metal and a bi-axial antiferromagnetic (AFM) dielectric can be a source of a coherent THz signal.
Maximum Detected Frequency of a Detector of Terahertz Frequency Signals based on an Antiferromagnetic Tunnel Junction
Terahertz-frequency (TF) electromagnetic radiation has great potential for use in medical, security, industry, and science applications. However, many problems concerning the generation, detection,
Ultra-fast wide band spectrum analyzer based on a rapidly tuned spin-torque nano-oscillator
A spintronic method of ultra-fast broadband microwave spectrum analysis is proposed. It uses a rapidly tuned spin torque nano-oscillator (STNO), and does not require injection locking. This method
Terahertz-Frequency Spin Hall Auto-oscillator Based on a Canted Antiferromagnet
We propose a design of a THz-frequency signal generator based on a layered structure consisting of a current-driven platinum (Pt) layer and a layer of an antiferromagnet (AFM) with easy-plane
Nonlinear Auto-Oscillator Theory of Microwave Generation by Spin-Polarized Current
This paper formulates a general analytic approach to the theory of microwave generation in magnetic nano-structures driven by spin-polarized current and reviews analytic results obtained in this
Terahertz Antiferromagnetic Spin Hall Nano-Oscillator.
TLDR
The combined effect of spin pumping and current-induced torques introduces a dynamic feedback that sustains steady-state oscillations with amplitudes controllable via the applied current in insulating antiferromagnets.
Ultrafast optical manipulation of magnetic order
The interaction of subpicosecond laser pulses with magnetically ordered materials has developed into a fascinating research topic in modern magnetism. From the discovery of subpicosecond
Spin transfer and current-induced switching in antiferromagnets
Recent experiments show that spin-polarized current may influence the state of generally accessory element of spin valves, an antiferromagnetic (AFM) layer, which is used for ``pinning.'' Here we
Electrical switching of an antiferromagnet
TLDR
Electrical writing is combined in solid-state memory with electrical readout and the stored magnetic state is insensitive to and produces no external magnetic field perturbations, which illustrates the unique merits of antiferromagnets for spintronics.
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