# First-Principles Studies on Spin-Dependent Transport of Magnetic Junctions with Half-Metallic Heusler Compounds

https://mdr.nims.go.jp/datasets/3ea7c9cd-1a08-4735-b6bd-b179c7df4621

## File

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## Id

3ea7c9cd-1a08-4735-b6bd-b179c7df4621

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## Visibility

open_to_public

## State

published

## Created at

2024-05-24T01:48:46.382115Z

## Updated at

2024-05-24T07:30:15.869048Z

## Published at

2024-05-24T07:30:16.242958Z

## Doi



## First published url

https://doi.org/10.3379/msjmag.2307r005

## Date published

2023-07-01

## Recorded date published

2023

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: First-Principles Studies on Spin-Dependent Transport of Magnetic Junctions
    with Half-Metallic Heusler Compounds
  title_type: original
  lang: en

## Description

- description: Two types of magnetoresistance (MR), i.e., tunnel magnetoresistance
    (TMR) and current perpendicular to plane giant magnetoresistance (CPP-GMR), are
    theoretically discussed for systems with half-metallic (HFM) Co-based full Heusler
    compounds. In TMR, the non-collinear spin structure at the Co2MnSi(CMS)/MgO(001)
    interface that results from thermal spin fluctuations significantly reduced the
    TMR ratio at room temperature (RT). Enhancement of the exchange stiffness of CMS/MgO
    was essential to suppress the reduction in TMR at RT. Furthermore, it is proposed
    that inserting of a B2-CoFe layer between CMS and MgO is a promising way to enhance
    the interface exchange stiffness constant. In CPP-GMR, the interface spin asymmetry
    γ in the Valet-Fert model was essential to enhance GMR at RT, because the temperature
    dependence of γ in experiments was much larger than that of the bulk spin asymmetry
    β. I showed that the experimental CPP-GMR ratio increases with the decrease in
    the theoretical resistance-area product RPA, which is roughly consistent with
    the RP dependence of γ. This means that matching of the conductive channel between
    HMF and a non-magnetic metallic spacer is a key parameter to enhance γ. These
    findings will be very important for room temperature spintronics devices applied
    in future artificial intelligence hardware.
  description_type: abstract
  lang: en

## Creator

- name: Y. Miura
  role: author
  orcid: https://orcid.org/0000-0002-5605-5452
  organization: National Institute for Materials Science

## Contact agent



## Publisher

organization: The Magnetics Society of Japan

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## Keyword

- subject: magnetoresistance, first-principles calculation, Heusler compound, TMR,
    CPP-GMR, ballistic transport, exchange stiffness
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Journal of the Magnetics Society of Japan
  issn: '18822924'
  volume: '47'
  issue: '4'
  start_page: 90
  end_page: 102
  article_number: 2307R005

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## Funding

- identifier: Grants-in-Aid for Scientifc Research (Grant Nos. 17H06152, 20H00299,
    20H02190, 20H02186, 21H01750 and 22H04966)
  funder_name: JSPS

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## Fileset

- id: 7eef834d-3f16-4a47-977e-b8c43f18455b
  filename: 2023Miura_JMSJ47_4.pdf
  content_type: application/pdf
  size: 1166948
  md5: e2b8626c4f899a538ebc3d3b14dcbdc4

## Thumbnail

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filename: 2023Miura_JMSJ47_4.pdf