# Comprehensive study of α-MgAgSb: Microstructure, carrier transport properties, and thermoelectric performance under ball milling techniques

https://mdr.nims.go.jp/datasets/9ac86458-2ada-4ae4-a6b3-9c9cdc61315b

## Files

- [MDI-JMST.pdf](https://mdr.nims.go.jp/filesets/a8b18d54-47d2-4c61-895f-12c67873f89f/download) ([Detail](https://mdr.nims.go.jp/filesets/a8b18d54-47d2-4c61-895f-12c67873f89f.md))

## Id

9ac86458-2ada-4ae4-a6b3-9c9cdc61315b

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-11-08T15:33:01.329813Z

## Updated at

2025-12-10T07:30:04.373130Z

## Published at

2025-12-10T07:25:18.067707Z

## Doi

https://doi.org/10.48505/nims.5980

## First published url

https://doi.org/10.1016/j.jmst.2024.11.061

## Date published

2025-01-11

## Recorded date published

2025-8

## Resource type

journal_article

## Manuscript type

authors_original

## Collection



## Title

- title: 'Comprehensive study of α-MgAgSb: Microstructure, carrier transport properties,
    and thermoelectric performance under ball milling techniques'
  title_type: original
  lang: en

## Description

- description: This study explores α-MgAgSb through various ball milling techniques
    aimed at investigating its crystal structure, microstructure, electronic, thermal
    transport properties, and thermoelectric performance. By systematically adjusting
    milling conditions, we controlled grain size, leading to enhanced charge carrier
    mobility, reduced resistivity, and improved performance of α-MgAgSb. We found
    that impurity phases hinder the grain growth of α-MgAgSb, especially in the case
    of the secondary phase Ag3Sb, thereby reducing carrier mobility. The low-temperature
    resistivity analysis presented in this study reveals distinct scattering mechanisms
    based on impurity levels and carrier mobility, providing a deeper insight into
    the fundamental electronic interactions of α-MgAgSb, which have not been comprehensively
    addressed in earlier works. The α-MgAgSb with lower Sb content predominantly exhibit
    electron-electron scattering, while higher impurity levels introduce both electron-electron
    and electron-phonon scattering, influencing carrier mobility. Additionally, thermal
    conductivity analysis using three Effective Medium Theory (EMT) methods illustrates
    how the distribution of Ag3Sb increases interfacial resistance. The maximum zT
    value of 1.36 at 473 K was observed in a compound with α-MgAgSb to Sb ratio of
    99% to 1%. This study illustrates how variations in synthesis methods influence
    microstructural characteristics such as grain size and impurity phases, and significantly
    impact thermoelectric performance via transport mechanisms.
  description_type: abstract
  lang: und

## Creator

- name: Song Yi Back
  role: author
  orcid: https://orcid.org/0009-0000-8890-1484
  organization: National Institute for Materials Science
- name: Steph Meikle
  role: author
- name: Takao Mori
  role: author
  orcid: https://orcid.org/0000-0003-2682-1846
  organization: National Institute for Materials Science

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: thermoelectric
  schema: not_defined

## Rights

- identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Journal of Materials Science & Technology
  issn: '10050302'
  volume: '227'
  start_page: 57
  end_page: 66

## Conference



## Related item



## Funding

- funder_name: Japan Science and Technology Agency
- identifier: JPMJMI19A1
  funder_name: JST-Mirai Program

## 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



## Software



## Custom property



## Fileset

- id: a8b18d54-47d2-4c61-895f-12c67873f89f
  filename: MDI-JMST.pdf
  content_type: application/pdf
  size: 2517475
  md5: '0598a07025ed8c762d103452b5f52eb6'

## Thumbnail

fileset_id: a8b18d54-47d2-4c61-895f-12c67873f89f
filename: MDI-JMST.pdf