Nanoscale magnetic tunnel junction sensors with perpendicular anisotropy sensing layer

Z. M. Zeng, P. Khalili Amiri, J. A. Katine, J. Langer, K. L. Wang, H. W. Jiang

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

A nano-scale linear magnetoresistance sensor is demonstrated using magnetic tunnel junctions with an in-plane magnetized reference layer and a sensing layer with interfacial perpendicular anisotropy. We show that the sensor response depends critically on the thickness of the sensing layer since its perpendicular anisotropy is significantly associated with thickness. The optimized sensors exhibit a large field sensitivity of up to 0.02 MR/Oe and a high linear field range of up to 600 Oe. These findings imply that this sensing scheme is a promising method for developing nano-scale magnetic sensors with simple design, high sensitivity, and low power consumption.

Original languageEnglish
Article number062412
JournalApplied Physics Letters
Volume101
Issue number6
DOIs
Publication statusPublished - 2012 Aug 6

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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