# Nanometer-thick Si/Al gradient materials for spin torque generation

https://mdr.nims.go.jp/datasets/367a40df-36f1-4580-8bea-2c58e207d619

## File

- [141-Sci. Adv. 11, eadr9481 (2025)-Horaguchi.pdf](https://mdr.nims.go.jp/filesets/2c0833e6-2fd3-4d20-b435-de86760e0b5f/download) ([Detail](https://mdr.nims.go.jp/filesets/2c0833e6-2fd3-4d20-b435-de86760e0b5f.md))

## Id

367a40df-36f1-4580-8bea-2c58e207d619

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-05-15T10:39:26.409301Z

## Updated at

2025-05-16T07:30:19.143326Z

## Published at

2025-05-16T07:19:05.087783Z

## Doi



## First published url

https://doi.org/10.1126/sciadv.adr9481

## Date published

2025-05-09

## Recorded date published

2025-5-9

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Nanometer-thick Si/Al gradient materials for spin torque generation
  title_type: original
  lang: en

## Description

- description: Green materials for efficient charge-to-spin conversion are desired
    for common spintronic applications. Recent studies have documented the efficient
    generation of spin torque using spin-orbit interactions (SOIs); however, SOI use
    relies on the employment of rare metals such as platinum. Here, we demonstrate
    that a nanometer-thick gradient from silicon to aluminum, which consists of readily
    available elements from earth resources, can produce a spin torque as large as
    that of platinum despite the weak SOI of these compositions. The spin torque efficiency
    can be improved by decreasing the thickness of the gradient, while a sharp interface
    was not found to increase the spin torque. Moreover, the electric conductivity
    of the gradient material can be up to twice as large as that of platinum, which
    provides a way to reduce Joule heating losses in spintronic devices.
  description_type: abstract
  lang: und

## Creator

- name: Taisuke Horaguchi
  role: author
  orcid: https://orcid.org/0009-0000-7435-6075
- name: Cong He
  role: author
  orcid: https://orcid.org/0000-0002-7548-9344
- name: Zhenchao Wen
  role: author
  orcid: https://orcid.org/0000-0001-7496-1339
- name: Hayato Nakayama
  role: author
  orcid: https://orcid.org/0009-0006-0510-2454
- name: Tadakatsu Ohkubo
  role: author
  orcid: https://orcid.org/0000-0003-3548-1951
- name: Seiji Mitani
  role: author
  orcid: https://orcid.org/0000-0002-1348-0774
- name: Hiroaki Sukegawa
  role: author
  orcid: https://orcid.org/0000-0002-4034-7848
- name: Junji Fujimoto
  role: author
  orcid: https://orcid.org/0000-0002-5669-1299
- name: Kazuto Yamanoi
  role: author
  orcid: https://orcid.org/0000-0001-5356-0712
- name: Mamoru Matsuo
  role: author
  orcid: https://orcid.org/0000-0003-1303-7614
- name: Yukio Nozaki
  role: author
  orcid: https://orcid.org/0000-0002-7262-0124

## Contact agent



## Publisher

organization: American Association for the Advancement of Science (AAAS)

## Managing organization



## Keyword

- subject: spintronics
  schema: not_defined

## Rights

- description: Copyright © 2025 The Authors, some rights reserved; exclusive licensee
    American Association for the Advancement of Science. No claim to original U.S.
    Government Works. Distributed under a Creative Commons Attribution License 4.0
    (CC BY).
  identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Science Advances
  issn: '23752548'
  volume: '11'
  issue: '19'

## Conference



## Related item



## Funding

- identifier: 19J21785
  funder_name: JSPS KAKENHI
- identifier: 24KJ1955
  funder_name: JSPS KAKENHI
- identifier: 22K20359
  funder_name: JSPS KAKENHI
- identifier: 20H01863
  funder_name: JSPS KAKENHI
- identifier: 21H04565
  funder_name: JSPS KAKENHI
- identifier: 24H00322
  funder_name: JSPS KAKENHI
- identifier: 24H02233
  funder_name: JSPS KAKENHI
- identifier: JPMJCR19J4
  funder_name: JST CREST
- identifier: XDB28000000
  funder_name: The Priority Program of the Chinese Academy of Sciences
- funder_name: Spintronics Research Network of Japan (Spin RNJ)

## 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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## Fileset

- id: 2c0833e6-2fd3-4d20-b435-de86760e0b5f
  filename: 141-Sci. Adv. 11, eadr9481 (2025)-Horaguchi.pdf
  content_type: application/pdf
  size: 990965
  md5: 6fa729b6c6f6d5ce9058c10da892be51

## Thumbnail

fileset_id: 2c0833e6-2fd3-4d20-b435-de86760e0b5f
filename: 141-Sci. Adv. 11, eadr9481 (2025)-Horaguchi.pdf