Frequency and power enhanced Magneto Resistance-based Tilted Polarizer Spin Torque Nano-Oscillator

Bhoomeeswaran, H.; Gowthaman, I.; Sabareesan, P.

doi:10.1007/s00339-019-2808-1

Cited by 11 publications

(2 citation statements)

References 39 publications

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“…Eventually, [7,8] developed STT leads to oscillating peak layer, paving way for microwave generation. The magnetization dynamics is led by LLGS equation [11], which may be written as…”

Section: Device Architecturementioning

confidence: 99%

Enhancement of microwave frequency via heterogeneous magneto resistance tilted polarizer based spin torque nano oscillator with the inclusion of Oersted field

Bhoomeeswaran,

Sabareesan

2023

J. Phys.: Conf. Ser.

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Here, we presented a heterogeneous Magneto Resistance Tilted Polarizer-based Spin Torque Nano Oscillator [MRTP-STNO] and theoretically included Current Induced Oersted Field [CIOF] via the macro-spin domain. The dynamics of magnetization provoked by Spin Transfer Torque [STT] are studied by solving Landau-Lifshitz-Gilbert-Slonczewski [LLGS] equation. In this device, β is the independent tilt angle of the fixed layer. In contrast, θ is the angle between the free layer magnetization and the easy axis of the device, respectively. Angles β and θ can be varied from 10° to 90° as an increment of 10°. The maximum obtained frequency of the device of about 215 GHz, and PSD of 1.7 μW/mA2/GHz with CIOF as 50 kA/m. We suggest the device is an ideal candidate for ultra High-Frequency and unveils a new path for foreseeable spintronic devices.

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“…Eventually, [7,8] developed STT leads to oscillating peak layer, paving way for microwave generation. The magnetization dynamics is led by LLGS equation [11], which may be written as…”

Section: Device Architecturementioning

confidence: 99%

Enhancement of microwave frequency via heterogeneous magneto resistance tilted polarizer based spin torque nano oscillator with the inclusion of Oersted field

Bhoomeeswaran,

Sabareesan

2023

J. Phys.: Conf. Ser.

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“…Besides IMA and PMA, STNOs with tilted magnetization have been proposed theoretically, promising a high tunability in microwave frequencies at low-to-zero field regime. − In practice, such tilted magnetization can be realized by coupling IMA and PMA materials through an interface exchange interaction, i.e., the so-called exchange spring (ES). − Various magnetic easy axes can then be obtained, based on a tailored balance between the strength of IMA, exchange coupling, and the PMA.…”

mentioning

confidence: 99%

Field-Free High-Frequency Exchange-Spring Spin-Torque Nano-Oscillators

Jiang

Chung

et al. 2023

Nano Lett.

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Spin-torque nano-oscillators (STNOs) are a type of nanoscale microwave auto-oscillators utilizing spin-torque to generate magnetodynamics with great promise for applications in microwaves, magnetic memory, and neuromorphic computing. Here, we report the first demonstration of exchange-spring STNOs, with an exchange-spring ([Co/Pd]-Co) reference layer and a perpendicular ([Co/Ni]) free layer. This magnetic configuration results in high-frequency (>10 GHz) microwave emission at a zero magnetic field and exchange-spring dynamics in the reference layer and the observation of magnetic droplet solitons in the free layer at different current polarities. Our demonstration of bipolar and field-free exchange-spring-based STNOs operating over a 20 GHz frequency range greatly extends the design freedom and functionality of the current STNO technology for energy-efficient high-frequency spintronic and neuromorphic applications.

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The effect of oscillatory interlayer exchange coupling on current-induced magnetization switching in pentalayer nanopillar alloys

et al. 2022

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Frequency and power enhanced Magneto Resistance-based Tilted Polarizer Spin Torque Nano-Oscillator

Cited by 11 publications

References 39 publications

Enhancement of microwave frequency via heterogeneous magneto resistance tilted polarizer based spin torque nano oscillator with the inclusion of Oersted field

Enhancement of microwave frequency via heterogeneous magneto resistance tilted polarizer based spin torque nano oscillator with the inclusion of Oersted field

Field-Free High-Frequency Exchange-Spring Spin-Torque Nano-Oscillators

The effect of oscillatory interlayer exchange coupling on current-induced magnetization switching in pentalayer nanopillar alloys

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