# Origin of the difference in spin-dependent transport properties between half-metallic <math>  <mrow>    <mi>C</mi>    <msub>      <mi>o</mi>      <mn>2</mn>    </msub>    <mi>FeG</mi>    <msub>      <mi>a</mi>      <mrow>        <mn>0.5</mn>      </mrow>    </msub>    <mi>G</mi>    <msub>      <mi>e</mi>      <mrow>        <mn>0.5</mn>      </mrow>    </msub>  </mrow></math> and <math>  <mrow>    <mi>C</mi>    <msub>      <mi>o</mi>      <mn>2</mn>    </msub>    <mi>M</mi>    <msub>      <mi>n</mi>      <mrow>        <mn>0.5</mn>      </mrow>    </msub>    <mi>F</mi>    <msub>      <mi>e</mi>      <mrow>        <mn>0.5</mn>      </mrow>    </msub>    <mi>Si</mi>  </mrow></math> with the Ag spacer

https://mdr.nims.go.jp/datasets/1ea8b1f6-d34c-49b8-926f-e94764b3eb72

## File

- [Revised-manuscript_PRM_2024_Paper1_final.pdf](https://mdr.nims.go.jp/filesets/0a33bdb1-f602-4081-b894-d05db370a4d9/download) ([Detail](https://mdr.nims.go.jp/filesets/0a33bdb1-f602-4081-b894-d05db370a4d9.md))

## Id

1ea8b1f6-d34c-49b8-926f-e94764b3eb72

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-01-16T02:31:59.047325Z

## Updated at

2025-01-24T23:30:32.358621Z

## Published at

2025-01-24T23:30:32.456550Z

## Doi

https://doi.org/10.48505/nims.5292

## First published url

https://doi.org/10.1103/physrevmaterials.8.104409

## Date published

2024-10-23

## Recorded date published

2024-10

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Origin of the difference in spin-dependent transport properties between half-metallic
    <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi mathvariant="normal">C</mml:mi><mml:msub><mml:mi
    mathvariant="normal">o</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>FeG</mml:mi><mml:msub><mml:mi
    mathvariant="normal">a</mml:mi><mml:mrow><mml:mn>0.5</mml:mn></mml:mrow></mml:msub><mml:mi
    mathvariant="normal">G</mml:mi><mml:msub><mml:mi mathvariant="normal">e</mml:mi><mml:mrow><mml:mn>0.5</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
    and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi
    mathvariant="normal">C</mml:mi><mml:msub><mml:mi mathvariant="normal">o</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi
    mathvariant="normal">M</mml:mi><mml:msub><mml:mi mathvariant="normal">n</mml:mi><mml:mrow><mml:mn>0.5</mml:mn></mml:mrow></mml:msub><mml:mi
    mathvariant="normal">F</mml:mi><mml:msub><mml:mi mathvariant="normal">e</mml:mi><mml:mrow><mml:mn>0.5</mml:mn></mml:mrow></mml:msub><mml:mi>Si</mml:mi></mml:mrow></mml:math>
    with the Ag spacer
  title_type: original
  lang: en

## Description

- description: " Current-perpendicular-to-plane giant magnetoresistive (CPP-GMR) devices
    are promising for next-generation magnetic read heads in hard disk drives due
    to their low resistance area product compared to tunnel magnetore sistive devices.
    While Co2FeGa0.5Ge0.5 (CFGG) and Co2Mn0.5Fe0.5Si (CMFS) are representative half-metallic
    Co-based Heusler alloys with experimentally observed high magnetoresistance (MR)
    in CPP-GMR with an Ag spacer, there is no understanding of the origin of the different
    band matching with the Ag spacer for the evaluation of ferromagnetic electrodes.
    In this study, first-principles calculations of the ballistic conductance in (001)-CFGG/Ag/CFGG
    and CMFS/Ag/CMFS were performed to clarify an origin of the difference in the
    spin-dependent conductance. We found that the majority-spin conductance of the
    CFGG/Ag(001) at its maximum was about 45% higher than that of the CMFS/Ag(001)
    over all interfacial terminations, indicating the advantageous potential of CFGG
    for achieving a larger MR ratio in CPP-GMR. A hybridization between the d states
    of the CFGG and the p states of the Ag plays an important role in the Fermi surface
    matching. "
  description_type: abstract
  lang: und

## Creator

- name: Kodchakorn Simalaotao
  role: author
  orcid: https://orcid.org/0000-0002-6098-4422
  organization: National Institute for Materials Science
- name: Yoshio Miura
  role: author
  orcid: https://orcid.org/0000-0002-5605-5452
  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: American Physical Society (APS)

## Managing organization



## Keyword

- subject: half-metal
  schema: not_defined
- subject: giant magnetoresistance
  schema: not_defined
- subject: Heusler
  schema: not_defined
- subject: spintronics
  schema: not_defined

## Rights

- description: "©2025 American Physical Society"
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Physical Review Materials
  issn: '24759953'
  volume: '8'
  issue: '10'
  article_number: '104409'

## Conference



## Related item



## Funding

- identifier: 21H01608
  funder_name: Japan Society for the Promotion of Science
- identifier: JPJ011438
  funder_name: Ministry of Education, Culture, Sports, Science and Technology
- identifier: JPMXP1122715503
  funder_name: Ministry of Education, Culture, Sports, Science and Technology
- identifier: JPMJCR21O1
  funder_name: Japan Science and Technology Corporation
- funder_name: National Institute for Materials Science

## Instrument



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## Specimen



## Chemical composition



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## Fileset

- id: 0a33bdb1-f602-4081-b894-d05db370a4d9
  filename: Revised-manuscript_PRM_2024_Paper1_final.pdf
  content_type: application/pdf
  size: 3553251
  md5: 8368f97803a0d6bc7771937404f14472

## Thumbnail

fileset_id: 0a33bdb1-f602-4081-b894-d05db370a4d9
filename: Revised-manuscript_PRM_2024_Paper1_final.pdf