# Magnetotransport properties in epitaxial films of metallic delafossite PdCoO2: Effects of thickness and width variations in Hall bar devices

https://mdr.nims.go.jp/datasets/d2d69da7-cb2f-4903-8220-c00b9ff21439

## File

- [PdCoO2_magnetotransport_Nono_Tchiomo.pdf](https://mdr.nims.go.jp/filesets/d09ab9d5-57b7-4e79-a114-6ae4836a6a3f/download) ([Detail](https://mdr.nims.go.jp/filesets/d09ab9d5-57b7-4e79-a114-6ae4836a6a3f.md))

## Id

d2d69da7-cb2f-4903-8220-c00b9ff21439

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-06-17T00:43:56.126085Z

## Updated at

2025-06-17T07:30:28.076477Z

## Published at

2025-06-17T07:22:46.403473Z

## Doi

https://doi.org/10.48505/nims.5535

## First published url

https://doi.org/10.1103/PhysRevMaterials.9.055001

## Date published

2025-05-22

## Recorded date published

2025-5

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: 'Magnetotransport properties in epitaxial films of metallic delafossite PdCoO2:
    Effects of thickness and width variations in Hall bar devices'
  title_type: original
  lang: en

## Description

- description: "We report on a combined structural and magnetotransport study of Hall
    bar devices of various lateral dimensions patterned side-by-side on epitaxial
    PdCoO2 thin films. We study the effects of both the thickness of the PdCoO2 film
    and the width of the channel on the electronic transport and the magnetoresistance
    properties of the Hall bar devices. All the films with thicknesses down to 4.88
    nm are epitaxially oriented, phase-pure, and exhibit metallic behavior. At room
    temperature, resistivity values as low as 6.85 and 8.17µ⁢Ωcm are achieved in Hall
    bar devices with channel width W=2.5µm and W=10µm, respectively. For the 4.88
    nm thick sample, we find that while the density of the conduction electrons is
    comparable in both channels, the electrons move about twice as fast in the narrower
    channel. At low temperatures, for Hall bar devices of channel width 2.5µm fabricated
    on epitaxial films of thicknesses 4.88 and 5.21 nm, the electron mobilities of
    ≈65 and 40cm2⁢V−1⁢s−1, respectively, are extracted. For thin-film Hall bar devices
    of width 10µm fabricated on the same 4.88 and 5.21 nm thick samples, the mobility
    values of ≈32 and 18cm2⁢V−1⁢s−1 are obtained. The magnetoresistance characteristics
    of these PdCoO2 films are observed to be temperature- dependent and exhibit a
    dependency with the orientation of the applied magnetic field. When the applied
    field is oriented 90∘ away from the crystal \U0001D450-axis, a persistent negative
    MR at all temperatures is observed. However when the field is parallel to the
    \U0001D450-axis, the negative magnetoresistance is suppressed at temperatures
    above 150 K."
  description_type: abstract
  lang: eng

## Creator

- name: Arnaud P. Nono Tchiomo
  role: author
  organization: Louisiana State University
- name: Anand Sharma
  role: author
  organization: Louisiana State University
- name: Sethulakshmi Sajeev
  role: author
  organization: Louisiana State University
- name: Anna Scheid
  role: author
  organization: Max Planck Institute for Solid State Research
- name: Peter A. van Aken
  role: author
  organization: Max Planck Institute for Solid State Research
- name: Takayuki Harada
  role: author
  orcid: https://orcid.org/0000-0002-8657-2258
  organization: National Institute for Materials Science
  department: Research Center for Materials Nanoarchitectonics (MANA)
- name: Prosper Ngabonziza
  role: author
  organization: Louisiana State University

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: low dimensional materials
  schema: not_defined
- subject: magnetotransport
  schema: not_defined
- subject: thin films
  schema: not_defined
- subject: oxides
  schema: not_defined

## Rights

- description: "©2025 American Physical Society"
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: PHYSICAL REVIEW MATERIALS
  issn: '24759953'
  volume: '9'
  issue: '5'

## Conference



## Related item



## Funding



## 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: d09ab9d5-57b7-4e79-a114-6ae4836a6a3f
  filename: PdCoO2_magnetotransport_Nono_Tchiomo.pdf
  content_type: application/pdf
  size: 7277338
  md5: b5ded9052fb9b2c038e8dd8b7f999862

## Thumbnail

fileset_id: d09ab9d5-57b7-4e79-a114-6ae4836a6a3f
filename: PdCoO2_magnetotransport_Nono_Tchiomo.pdf