# Analysis of the effect of the Fermi surface matching at Co–Fe and Cu interface on giant magnetoresistance effect using a combinatorial technique

https://mdr.nims.go.jp/datasets/a3b14b3d-6319-4400-a33d-6f2208d03226

## File

- [Varun Co-Fe Cu CIP-GMR AIP Advances (2024).pdf](https://mdr.nims.go.jp/filesets/85d02a37-ba93-4f71-8c36-a02f24c6ca41/download) ([Detail](https://mdr.nims.go.jp/filesets/85d02a37-ba93-4f71-8c36-a02f24c6ca41.md))

## Id

a3b14b3d-6319-4400-a33d-6f2208d03226

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-01-06T05:13:21.946675Z

## Updated at

2025-01-07T07:30:50.741633Z

## Published at

2025-01-07T07:30:50.831307Z

## Doi



## First published url

https://doi.org/10.1063/5.0216909

## Date published

2024-12-01

## Recorded date published

2024-12-1

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Analysis of the effect of the Fermi surface matching at Co–Fe and Cu interface
    on giant magnetoresistance effect using a combinatorial technique
  title_type: original
  lang: en

## Description

- description: "Interfacial electronic band-matching (EBM) plays a crucial role in
    determining the spin-dependent transport properties and performance of spintronic
    devices. The final goal of this study is to establish a method to search for new
    material combinations that exhibit favorable EBM at the interfaces to achieve
    a superior performance in various spintronic devices using the machine learning
    technique combined with the first-principles calculations. As a first step, we
    investigate the effect of interfacial EBM on magnetoresistance (MR) by fabricating
    the currentin- plane giant magnetoresistive devices with compositionally graded
    Co1−xFex layers and Cu spacer. The MR ratio varies significantly across x = 0.11–1.0,
    with the highest MR of 17.5% observed at x = 0.46, followed by a sharp decrease
    beyond x = 0.6. To analyze the x dependence of MR in terms of EBM with low computational
    cost, we calculate the simple Fermi surfaces of bcc Co1−xFex and Cu and evaluate
    the wave\r\nnumber (k) distance between their Fermi surfaces. The closest (furthest)
    Fermi surface match occurs at x = 0.4 (1.0), which tends to be in good agreement
    with the observed MR trend. This suggests that a simple Fermi surface similarity
    analysis, when integrated"
  description_type: abstract
  lang: und

## Creator

- name: Varun Kumar Kushwaha
  role: author
  orcid: https://orcid.org/0000-0001-6344-4264
  organization: National Institute for Materials Science
- name: Ryo Toyama
  role: author
  orcid: https://orcid.org/0000-0002-7398-5803
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Yoshio Miura
  role: author
  orcid: https://orcid.org/0000-0002-5605-5452
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Yuma Iwasaki
  role: author
  orcid: https://orcid.org/0000-0002-7117-277X
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Yuya Sakuraba
  role: author
  orcid: https://orcid.org/0000-0003-4618-9550
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26

## Contact agent



## Publisher

organization: AIP Publishing

## Managing organization



## Keyword

- subject: spintronics
  schema: not_defined
- subject: giant magnetoresistance
  schema: not_defined
- subject: machine learning
  schema: not_defined
- subject: Fermi surface
  schema: not_defined
- subject: interfacial electronic band matching
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by-nc-nd/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: AIP Advances
  issn: '21583226'
  volume: '14'
  issue: '12'
  article_number: '125329'

## Conference



## Related item



## Funding

- identifier: 19K05249
  funder_name: Japan Society for the Promotion of Science
- identifier: JPMJCR21O1
  funder_name: Core Research for Evolutional Science and Technology
- identifier: JPMXP1122715503
  funder_name: MEXT Program

## 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



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## Custom property



## Fileset

- id: 85d02a37-ba93-4f71-8c36-a02f24c6ca41
  filename: Varun Co-Fe Cu CIP-GMR AIP Advances (2024).pdf
  content_type: application/pdf
  size: 7178811
  md5: 1eb085d53a6f0e286f2bd16a7196fca5

## Thumbnail

fileset_id: 85d02a37-ba93-4f71-8c36-a02f24c6ca41
filename: Varun Co-Fe Cu CIP-GMR AIP Advances (2024).pdf