# Improvement of magnetic field detectivity in electrical 1/f noise-dominated tunnel magnetoresistive sensors by AC magnetic field modulation technique

https://mdr.nims.go.jp/datasets/3b6fb13b-9c3d-41c8-9bff-c568ddb075ac

## File

- [Final version for MDR upload.pdf](https://mdr.nims.go.jp/filesets/94fcfb04-48e2-4bdb-84cb-63d18885776b/download) ([Detail](https://mdr.nims.go.jp/filesets/94fcfb04-48e2-4bdb-84cb-63d18885776b.md))
- [Supplementary materials.docx](https://mdr.nims.go.jp/filesets/c325bb09-a8a9-427b-86f3-26859635bf51/download) ([Detail](https://mdr.nims.go.jp/filesets/c325bb09-a8a9-427b-86f3-26859635bf51.md))

## Id

3b6fb13b-9c3d-41c8-9bff-c568ddb075ac

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-01-11T04:28:11.572163Z

## Updated at

2024-02-16T03:27:44.415921Z

## Published at

2024-01-23T07:30:11.141491Z

## Doi

https://doi.org/10.48505/nims.4364

## First published url

https://doi.org/10.1063/5.0180812

## Date published

2023-12-07

## Recorded date published

2023-12-7

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Improvement of magnetic field detectivity in electrical 1/f noise-dominated
    tunnel magnetoresistive sensors by AC magnetic field modulation technique
  title_type: original
  lang: en

## Description

- description: Suppression of 1/f noise in tunnel magnetoresistance (TMR) sensors
    is a central issue in the realization of magnetic field sensors with ultrafine
    magnetic field detectivity. Although AC modulation with an external magnetic field
    has been proposed as a method to shift the operating frequency of a sensor to
    a high frequency and substantially suppress 1/f noise, its effects on the two
    types of 1/f noise, that is, magnetic and electrical 1/f noise, are not well understood.
    In this study, we investigated the noise characteristics and signal detection
    performance of TMR sensors with an even-function resistance-magnetic field curve
    operated by the AC modulation method. For one TMR device in which the magnetic
    1/f noise was dominant, AC modulation degraded the magnetic field detectivity
    owing to the additional noise induced by the AC modulation field. However, in
    another TMR device, in which the electrical 1/f noise was artificially enhanced
    by introducing lattice defects in the MgO tunnel barrier, AC modulation effectively
    suppressed the 1/f noise and improved the magnetic field detectivity by one order.
    This demonstrates that the AC modulation method using an external magnetic field
    is effective for magnetic field sensors in which electrical 1/f noise is dominant.
  description_type: abstract
  lang: eng

## Creator

- name: Tomoya Nakatani
  role: author
  orcid: https://orcid.org/0000-0001-9590-216X
  organization: National Institute for Materials Science
- name: Hirofumi Suto
  role: author
  orcid: https://orcid.org/0000-0003-4387-5862
  organization: National Institute for Materials Science
- name: Prabhanjan D. Kulkarni
  role: author
  orcid: https://orcid.org/0000-0002-4605-5256
  organization: National Institute for Materials Science
- name: Hitoshi Iwasaki
  role: author
  organization: National Institute for Materials Science
- name: Yuya Sakuraba
  role: author
  orcid: https://orcid.org/0000-0003-4618-9550
  organization: National Institute for Materials Science

## Contact agent



## Publisher

organization: AIP Publishing

## Managing organization



## Keyword

- subject: tunnel magnetoresistance
  schema: not_defined
- subject: magnetic sensor
  schema: not_defined
- subject: noise
  schema: not_defined
- subject: 1/f noise
  schema: not_defined

## Rights

- description: "This article may be downloaded for personal use only. Any other use
    requires prior permission of the author and AIP Publishing. This article\r\nappeared
    in Tomoya Nakatani. Appl. Phys. 134, 213904 (2023) and\r\nmay be found at https://doi.org/10.1063/5.0180812"
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: JOURNAL OF APPLIED PHYSICS
  issn: '00218979'
  volume: '134'
  issue: '21'
  start_page: 213904
  end_page: 213904

## Conference



## Related item



## Funding

- identifier: 20K04588
  funder_name: 日本学術振興会
  description: 科研費基盤研究(C)

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



## Software



## Custom property



## Fileset

- id: 94fcfb04-48e2-4bdb-84cb-63d18885776b
  filename: Final version for MDR upload.pdf
  content_type: application/pdf
  size: 1411748
  md5: c5609cbc72a43cf283841af3e3c12839
- id: c325bb09-a8a9-427b-86f3-26859635bf51
  filename: Supplementary materials.docx
  content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
  size: 83882
  md5: ee14ebc8b7066ac4a94934a6fbf5cc56

## Thumbnail

fileset_id: 94fcfb04-48e2-4bdb-84cb-63d18885776b
filename: Final version for MDR upload.pdf