# Band-folding-driven high tunnel magnetoresistance ratios in (111)-oriented junctions with <math>  <msub>    <mi>SrTiO</mi>    <mn>3</mn>  </msub></math> barriers

https://mdr.nims.go.jp/datasets/4aa4073c-1df7-43a5-9cf0-3e18b87e1ef2

## File

- [PhysRevB.106.134438.pdf](https://mdr.nims.go.jp/filesets/cafa3a8c-ec5e-4df2-b206-62610e5f024a/download) ([Detail](https://mdr.nims.go.jp/filesets/cafa3a8c-ec5e-4df2-b206-62610e5f024a.md))

## Id

4aa4073c-1df7-43a5-9cf0-3e18b87e1ef2

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-04-10T01:27:39.126526Z

## Updated at

2024-04-11T04:28:22.880047Z

## Published at

2024-04-11T03:30:24.570586Z

## Doi



## First published url

https://doi.org/10.1103/physrevb.106.134438

## Date published

2022-10-31

## Recorded date published

2022-10

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Band-folding-driven high tunnel magnetoresistance ratios in (111)-oriented
    junctions with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>SrTiO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>
    barriers
  title_type: original
  lang: en

## Description

- description: We theoretically study the tunnel magnetoresistance (TMR) effect in
    novel (111)-oriented magnetic tunnel junctions (MTJs) with SrTiO3 barriers, Co/SrTiO3/Co(111)
    and Ni/SrTiO3/Ni(111). Our analysis combining the first-principles calculation
    and the Landauer formula shows that the Co-based MTJ has a high TMR ratio over
    500%, while the Ni-based MTJ has a smaller value (290%). Since the in-plane lattice
    periodicity of SrTiO3 is about twice as that of the primitive cell of fcc Co (Ni),
    the original bands of Co (Ni) are folded in the kx-ky plane corresponding to the
    ab-plane of the MTJ supercell. We find that this band folding gives a half-metallic
    band structure in the Lambda1 state of Co (Ni) and the coherent tunneling of such
    a half-metallic Lambda1 state yields a high TMR ratio. We also reveal that the
    difference in the TMR ratio between the Co- and Ni-based MTJs can be understood
    by different s-orbital weights in the Lambda1 band at the Fermi level.
  description_type: abstract
  lang: und

## Creator

- name: Keisuke Masuda
  role: author
  orcid: https://orcid.org/0000-0002-6884-6390
  organization: National Institute for Materials Science
- name: Hiroyoshi Itoh
  role: author
- name: Yoshiaki Sonobe
  role: author
- name: Hiroaki Sukegawa
  role: author
  orcid: https://orcid.org/0000-0002-4034-7848
  organization: National Institute for Materials Science
- name: Seiji Mitani
  role: author
  orcid: https://orcid.org/0000-0002-1348-0774
  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

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: Tunnel magnetoresistance
  schema: not_defined
- subject: Magnetic tunnel junction
  schema: not_defined
- subject: Spintronics
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Physical Review B
  issn: 1550235X
  volume: '106'
  issue: '13'
  article_number: '134438'

## Conference



## Related item



## Funding

- identifier: JP22H04966
  funder_name: Japan Society for the Promotion of Science
- identifier: JP20H02190
  funder_name: Japan Society for the Promotion of Science
- identifier: JP21H01750
  funder_name: Japan Society for the Promotion of Science
- identifier: JP20K14782
  funder_name: Japan Society for the Promotion of Science
- identifier: JPMJCR21C1
  funder_name: Japan Science and Technology Agency

## Instrument



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## Measurement method



## Specimen



## Chemical composition



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## Fileset

- id: cafa3a8c-ec5e-4df2-b206-62610e5f024a
  filename: PhysRevB.106.134438.pdf
  content_type: application/pdf
  size: 2295290
  md5: 406083f5ae013261d994c116360c7fd3

## Thumbnail

fileset_id: cafa3a8c-ec5e-4df2-b206-62610e5f024a
filename: PhysRevB.106.134438.pdf