Tuning magnetic nanostructures and flux concentrators for magnetoresistive sensors

Xiaolu Yin, Yen Fu Liu, Dan Ewing, Carmen K. Ruder, Paul J. De Rego, A. S. Edelstein, Sy-Hwang Liou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The methods for the optimization of the magnetoresistive (MR) sensors are to reduce sources of noises, to increase the signal, and to understand the involved fundamental limitations. The high-performance MR sensors result from important magnetic tunnel junction (MTJ) properties, such as tunneling magnetoresistance ratio (TMR), coercivity (Hc), exchange coupling field (He), domain structures, and noise properties as well as the external magnetic flux concentrators. All these parameters are sensitively controlled by the magnetic nanostructures, which can be tuned by varying junction free layer nanostructures, geometry, and magnetic annealing process etc. In this paper, we discuss some of efforts that an optimized magnetic sensor with a sensitivity as high as 5,146 %/mT. This sensitivity is currently the highest among all MR-type sensors that have been reported. The estimated noise of our magnetoresistive sensor is 47 pT/Hz1/2 at 1 Hz. This magnetoresistance sensor dissipates only 100 μW of power while operating under an applied voltage of 1 V at room temperature.

Original languageEnglish (US)
Title of host publicationSpintronics VIII
EditorsHenri-Jean Drouhin, Jean-Eric Wegrowe, Manijeh Razeghi
PublisherSPIE
ISBN (Electronic)9781628417173
DOIs
StatePublished - Jan 1 2015
EventSpintronics VIII - San Diego, United States
Duration: Aug 9 2015Aug 13 2015

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9551
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherSpintronics VIII
CountryUnited States
CitySan Diego
Period8/9/158/13/15

Fingerprint

Concentrator
concentrators
Nanostructures
Tuning
tuning
Fluxes
Sensor
sensors
Sensors
Magnetoresistance
Tunnelling magnetoresistance
Magnetic sensors
Exchange coupling
Tunnel junctions
Magnetic flux
Dissipate
Coercive force
Coercivity
sensitivity
Tunnel

Keywords

  • Magnetic flux concentrators
  • Magnetic tunnel junction
  • Magnetoresistive sensor
  • Multilayer thin films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Yin, X., Liu, Y. F., Ewing, D., Ruder, C. K., De Rego, P. J., Edelstein, A. S., & Liou, S-H. (2015). Tuning magnetic nanostructures and flux concentrators for magnetoresistive sensors. In H-J. Drouhin, J-E. Wegrowe, & M. Razeghi (Eds.), Spintronics VIII [95512N] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9551). SPIE. https://doi.org/10.1117/12.2188712

Tuning magnetic nanostructures and flux concentrators for magnetoresistive sensors. / Yin, Xiaolu; Liu, Yen Fu; Ewing, Dan; Ruder, Carmen K.; De Rego, Paul J.; Edelstein, A. S.; Liou, Sy-Hwang.

Spintronics VIII. ed. / Henri-Jean Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi. SPIE, 2015. 95512N (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9551).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Yin, X, Liu, YF, Ewing, D, Ruder, CK, De Rego, PJ, Edelstein, AS & Liou, S-H 2015, Tuning magnetic nanostructures and flux concentrators for magnetoresistive sensors. in H-J Drouhin, J-E Wegrowe & M Razeghi (eds), Spintronics VIII., 95512N, Proceedings of SPIE - The International Society for Optical Engineering, vol. 9551, SPIE, Spintronics VIII, San Diego, United States, 8/9/15. https://doi.org/10.1117/12.2188712
Yin X, Liu YF, Ewing D, Ruder CK, De Rego PJ, Edelstein AS et al. Tuning magnetic nanostructures and flux concentrators for magnetoresistive sensors. In Drouhin H-J, Wegrowe J-E, Razeghi M, editors, Spintronics VIII. SPIE. 2015. 95512N. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.2188712
Yin, Xiaolu ; Liu, Yen Fu ; Ewing, Dan ; Ruder, Carmen K. ; De Rego, Paul J. ; Edelstein, A. S. ; Liou, Sy-Hwang. / Tuning magnetic nanostructures and flux concentrators for magnetoresistive sensors. Spintronics VIII. editor / Henri-Jean Drouhin ; Jean-Eric Wegrowe ; Manijeh Razeghi. SPIE, 2015. (Proceedings of SPIE - The International Society for Optical Engineering).
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