Voltage assisted control of spin-transfer nano-oscillators

Bahniman Ghosh; Gaurav Solanki

doi:10.1088/1674-4926/36/3/034004

J. Semicond. > 2015, Volume 36 > Issue 3 > 034004

SEMICONDUCTOR DEVICES

Voltage assisted control of spin-transfer nano-oscillators

Bahniman Ghosh¹ and Gaurav Solanki²

+ Author Affiliations

Corresponding author: Bahniman Ghosh, E-mail: bghosh@utexas.edu

DOI: 10.1088/1674-4926/36/3/034004

Abstract: The spin-transfer nano-oscillator (STNO) has recently acquired a huge amount of research interest, due to its promising easy tunability along with the miniature size. The output frequency control of an STNO through magnetic field and current has been examined almost to its full extent; however, there are issues that still need to be addressed. Here, we propose a novel way of voltage control of the output frequency of an STNO, and alongside reducing its power requirement.

Key words: spin-transfer nano-oscillator, voltage controlled magnetic anisotropy, tunnelling magnetoresistance

References

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Fig. 1. (a) A typical device configuration of an STNO. (b) Typical oscillation produced by an STNO.

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Fig. 2. Proposed structure of voltage (assisted) controlled STNO.

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Fig. 3. Frequency dependence on applied current in normal STNO.

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Fig. 4. Effect of VCMA on STNO as compared directly with the natural state, i.e. an inert STNO at currents of (a) 0.6 mA, (b) 0.7 mA, (c) 0.8 mA.

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Fig. 5. Effect of oxide material at 0.6 mA.

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Fig. 6. Effect of oxide material at 0.7 mA.

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Fig. 7. Effect of oxide material at 0.8 mA.

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Bahniman Ghosh, Gaurav Solanki. Voltage assisted control of spin-transfer nano-oscillators[J]. Journal of Semiconductors, 2015, 36(3): 034004. doi: 10.1088/1674-4926/36/3/034004

B Ghosh, G Solanki. Voltage assisted control of spin-transfer nano-oscillators[J]. J. Semicond., 2015, 36(3): 034004. doi: 10.1088/1674-4926/36/3/034004.

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Received: 13 August 2014 Revised: Online: Published: 01 March 2015

The spin-transfer nano-oscillator (STNO) has recently acquired a huge amount of research interest, due to its promising easy tunability along with the miniature size. The output frequency control of an STNO through magnetic field and current has been examined almost to its full extent; however, there are issues that still need to be addressed. Here, we propose a novel way of voltage control of the output frequency of an STNO, and alongside reducing its power requirement.

Voltage assisted control of spin-transfer nano-oscillators

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