# Large perpendicular magnetic anisotropy at Fe/rock-salt-type Cr-oxide interface synthesized via oxygen-driven chemical layer exchange process

https://mdr.nims.go.jp/datasets/db8ddc4e-7261-4db9-8d6b-fb9adc3eb403

## File

- [137-APL Mater. 12, 111116 (2024)-Iida.pdf](https://mdr.nims.go.jp/filesets/e9118c65-3935-4cac-a266-5392e0c529d8/download) ([Detail](https://mdr.nims.go.jp/filesets/e9118c65-3935-4cac-a266-5392e0c529d8.md))

## Id

db8ddc4e-7261-4db9-8d6b-fb9adc3eb403

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-12-09T03:50:25.016759Z

## Updated at

2024-12-10T07:55:28.554009Z

## Published at

2024-12-10T07:55:28.634654Z

## Doi



## First published url

https://doi.org/10.1063/5.0233103

## Date published

2024-11-01

## Recorded date published

2024-11-1

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Large perpendicular magnetic anisotropy at Fe/rock-salt-type Cr-oxide interface
    synthesized via oxygen-driven chemical layer exchange process
  title_type: original
  lang: en

## Description

- description: Perpendicular magnetic anisotropy (PMA) induced at the interface of
    the metallic magnetic layer/oxide layer plays a major role in scaling of state-of-the-art
    spin-transfer-torque magnetoresistive random access memory. The realization of
    PMA requires the development of mature interface manipulation techniques, as well
    as materials constituting the interface. Herein, we report large PMA using stacks
    developed with an ultrathin (~0.7 nm) Fe/rock-salt CrO(001) interface via an oxygen-driven
    diffusion process. The stacks were prepared by sputter-deposition and post-annealing
    of the Cr buffer/ultrathin Fe/MgO structure. Significant oxidation of the Fe layer
    and Cr diffusion into the MgO layer occurred during the deposition. After post-annealing,
    the oxidized Fe layer was reduced to form an Fe/rock-salt-type Cr-monoxide structure
    due to chemical layer exchange. The lattice-matched Fe/CrO interface with a large
    interfacial PMA energy of 1.55 mJ/m2 was confirmed after annealing at 500degreeC.
    X-ray absorption spectroscopy measurements revealed that the post-annealing promoted
    the redox reaction from the Fe oxide to the metallic Fe and the formation of the
    CrO. The observed PMA indicates that the oxygen-driven diffusion process by annealing
    resulted in the well-controlled Fe/CrO interface. The demonstrated diffusion process
    provides a new chemical route to fabricate artificial, well-controlled PMA interfaces,
    even containing metastable materials, beyond the conventional sequential layer
    stacking for the development of spintronic devices.
  description_type: abstract
  lang: und

## Creator

- name: Yuki Iida
  role: author
- name: Qingyi Xiang
  role: author
  orcid: https://orcid.org/0000-0003-4530-0528
- name: Thomas Scheike
  role: author
  orcid: https://orcid.org/0000-0002-9163-5524
- name: Zhenchao Wen
  role: author
  orcid: https://orcid.org/0000-0001-7496-1339
- name: Jun Okabayashi
  role: author
  orcid: https://orcid.org/0000-0002-9025-2783
- name: Jun Uzuhashi
  role: author
  orcid: https://orcid.org/0000-0003-2023-8158
- name: Tadakatsu Ohkubo
  role: author
  orcid: https://orcid.org/0000-0003-3548-1951
- name: Kazuhiro Hono
  role: author
  orcid: https://orcid.org/0000-0001-7367-0193
- name: Hiroaki Sukegawa
  role: author
  orcid: https://orcid.org/0000-0002-4034-7848
- name: Seiji Mitani
  role: author
  orcid: https://orcid.org/0000-0002-1348-0774

## Contact agent



## Publisher

organization: AIP Publishing

## Managing organization



## Keyword

- subject: spintronics
  schema: not_defined
- subject: perpendicular magnetic anisotropy
  schema: not_defined
- subject: CrO
  schema: not_defined
- subject: epitaxial growth
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: APL Materials
  issn: 2166532X
  volume: '12'
  issue: '11'

## Conference



## Related item



## Funding

- identifier: 16H06332
  funder_name: Japan Society for the Promotion of Science
- identifier: JPNP16007
  funder_name: New Energy and Industrial Technology Development Organization
- identifier: 22H04966
  funder_name: Japan Society for the Promotion of Science
- identifier: 23K26535
  funder_name: Japan Society for the Promotion of Science
- identifier: 24H00408
  funder_name: Japan Society for the Promotion of Science
- identifier: 2021G069
  funder_name: the Photon Factory Program Advisory Committee, KEK

## 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: e9118c65-3935-4cac-a266-5392e0c529d8
  filename: 137-APL Mater. 12, 111116 (2024)-Iida.pdf
  content_type: application/pdf
  size: 9187136
  md5: 04d2d0239e8addf229f014ce044126e3

## Thumbnail

fileset_id: e9118c65-3935-4cac-a266-5392e0c529d8
filename: 137-APL Mater. 12, 111116 (2024)-Iida.pdf