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Noise suppression and sensitivity manipulation of magnetic tunnel junction sensors with soft magnetic Co 70.5 Fe 4.5 Si 15 B 10 layer

The voltage noise characteristic and sensitivity of magnetic tunnel junction sensors are crucial for ultralow field detection. In this work, we used a soft magnetic material electrode Co 70.5 Fe 4.5 Si 15 B 10 as a sensing layer to improve the sensitivity. Then, a bias field along the easy axis of a... Full description

Journal Title: Journal of Applied Physics 21 September 2017, Vol.122(11)
Main Author: Huang, L.
Other Authors: Yuan, Z. H. , Tao, B. S. , Wan, C. H. , Guo, P. , Zhang, Q. T. , Yin, L. , Feng, J. F. , Nakano, T. , Naganuma, H. , Liu, H. F. , Yan, Y. , Han, X. F.
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0021-8979 ; E-ISSN: 1089-7550 ; DOI: 10.1063/1.4990478
Link: http://dx.doi.org/10.1063/1.4990478
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recordid: aip_complete10.1063/1.4990478
title: Noise suppression and sensitivity manipulation of magnetic tunnel junction sensors with soft magnetic Co 70.5 Fe 4.5 Si 15 B 10 layer
format: Article
creator:
  • Huang, L.
  • Yuan, Z. H.
  • Tao, B. S.
  • Wan, C. H.
  • Guo, P.
  • Zhang, Q. T.
  • Yin, L.
  • Feng, J. F.
  • Nakano, T.
  • Naganuma, H.
  • Liu, H. F.
  • Yan, Y.
  • Han, X. F.
subjects:
  • Articles
ispartof: Journal of Applied Physics, 21 September 2017, Vol.122(11)
description: The voltage noise characteristic and sensitivity of magnetic tunnel junction sensors are crucial for ultralow field detection. In this work, we used a soft magnetic material electrode Co 70.5 Fe 4.5 Si 15 B 10 as a sensing layer to improve the sensitivity. Then, a bias field along the easy axis of a free layer was applied to improve the linearity and manipulate the sensitivity of magnetic tunnel junction sensors. More importantly, random telegraph noise was suppressed by the bias field, resulting in hysteresis-free performance. The highest sensitivity of 3.9%/Oe and the best field detectivity of 4.5   nT / √   Hz at 10 Hz without hysteresis have been achieved. The sensors showed excellent performance with CoFeSiB electrodes, indicating that it is an effective way to improve the performance of sensors by introducing the bias field.
language: eng
source:
identifier: ISSN: 0021-8979 ; E-ISSN: 1089-7550 ; DOI: 10.1063/1.4990478
fulltext: fulltext
issn:
  • 0021-8979
  • 1089-7550
  • 00218979
  • 10897550
url: Link


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titleNoise suppression and sensitivity manipulation of magnetic tunnel junction sensors with soft magnetic Co 70.5 Fe 4.5 Si 15 B 10 layer
creatorHuang, L. ; Yuan, Z. H. ; Tao, B. S. ; Wan, C. H. ; Guo, P. ; Zhang, Q. T. ; Yin, L. ; Feng, J. F. ; Nakano, T. ; Naganuma, H. ; Liu, H. F. ; Yan, Y. ; Han, X. F.
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descriptionThe voltage noise characteristic and sensitivity of magnetic tunnel junction sensors are crucial for ultralow field detection. In this work, we used a soft magnetic material electrode Co 70.5 Fe 4.5 Si 15 B 10 as a sensing layer to improve the sensitivity. Then, a bias field along the easy axis of a free layer was applied to improve the linearity and manipulate the sensitivity of magnetic tunnel junction sensors. More importantly, random telegraph noise was suppressed by the bias field, resulting in hysteresis-free performance. The highest sensitivity of 3.9%/Oe and the best field detectivity of 4.5   nT / √   Hz at 10 Hz without hysteresis have been achieved. The sensors showed excellent performance with CoFeSiB electrodes, indicating that it is an effective way to improve the performance of sensors by introducing the bias field.
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descriptionThe voltage noise characteristic and sensitivity of magnetic tunnel junction sensors are crucial for ultralow field detection. In this work, we used a soft magnetic material electrode Co 70.5 Fe 4.5 Si 15 B 10 as a sensing layer to improve the sensitivity. Then, a bias field along the easy axis of a free layer was applied to improve the linearity and manipulate the sensitivity of magnetic tunnel junction sensors. More importantly, random telegraph noise was suppressed by the bias field, resulting in hysteresis-free performance. The highest sensitivity of 3.9%/Oe and the best field detectivity of 4.5   nT / √   Hz at 10 Hz without hysteresis have been achieved. The sensors showed excellent performance with CoFeSiB electrodes, indicating that it is an effective way to improve the performance of sensors by introducing the bias field.
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authorHuang, L. ; Yuan, Z. H. ; Tao, B. S. ; Wan, C. H. ; Guo, P. ; Zhang, Q. T. ; Yin, L. ; Feng, J. F. ; Nakano, T. ; Naganuma, H. ; Liu, H. F. ; Yan, Y. ; Han, X. F.
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abstractThe voltage noise characteristic and sensitivity of magnetic tunnel junction sensors are crucial for ultralow field detection. In this work, we used a soft magnetic material electrode Co 70.5 Fe 4.5 Si 15 B 10 as a sensing layer to improve the sensitivity. Then, a bias field along the easy axis of a free layer was applied to improve the linearity and manipulate the sensitivity of magnetic tunnel junction sensors. More importantly, random telegraph noise was suppressed by the bias field, resulting in hysteresis-free performance. The highest sensitivity of 3.9%/Oe and the best field detectivity of 4.5   nT / √   Hz at 10 Hz without hysteresis have been achieved. The sensors showed excellent performance with CoFeSiB electrodes, indicating that it is an effective way to improve the performance of sensors by introducing the bias field.
pubAIP Publishing LLC
doi10.1063/1.4990478
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date2017-09-21