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Designing flexible magnetic materials for zero-magnetic-field operation of the anomalous Nernst effect.

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Title: Designing flexible magnetic materials for zero-magnetic-field operation of the anomalous Nernst effect.
Authors: Park, Sang J.1 (AUTHOR) PARK.SangJun@nims.go.jp, Modak, Rajkumar1 (AUTHOR), Gautam, Ravi1 (AUTHOR), Alasli, Abdulkareem2 (AUTHOR), Hirai, Takamasa1 (AUTHOR), Ando, Fuyuki1 (AUTHOR), Nagano, Hosei2 (AUTHOR), Sepehri-Amin, Hossein1 (AUTHOR), Uchida, Ken-ichi1,3 (AUTHOR) UCHIDA.Kenichi@nims.go.jp
Source: Acta Materialia. Dec2025, Vol. 301, pN.PAG-N.PAG. 1p.
Subjects: Nernst effect, Energy harvesting, Waste heat, Thermoelectric apparatus & appliances, Amorphous substances, Thermoelectric effects, Soft magnetic materials, Clean energy
Abstract: The global shift towards a carbon-neutral society has accelerated the demand for green energy, driving research into efficient technologies for harvesting energy from low-grade waste heat. Recently, transverse thermoelectrics based on the anomalous Nernst effect (ANE) has gained attention due to their simple device structure, scalability, and manufacturing-friendly nature. While topological single crystals and epitaxial films have been the focus for enhancing the ANE-driven thermoelectric performance, further improvements in material design are necessary for practical applications. Here, we report an easy-to-implement strategy for designing mechanically flexible transverse thermoelectric materials by creating amorphous-crystalline heterogeneous composites. We fabricated and optimized the heterogeneous composites through controlled heat treatment, achieving a significant enhancement of the anomalous Nernst coefficient, while maintaining flexibility. Additionally, the developed materials showed sufficiently large coercivity enabling operation of materials in devices under zero external magnetic field. Using the developed material, we constructed a single-material-based coiled device and demonstrated zero-field operation of the ANE-based energy harvesting from curved heat sources. These results validate the feasibility of using the ANE-based flexible materials for energy harvesting applications. [Display omitted] [ABSTRACT FROM AUTHOR]
Copyright of Acta Materialia is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 188709528
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Designing flexible magnetic materials for zero-magnetic-field operation of the anomalous Nernst effect.
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  Data: <searchLink fieldCode="AR" term="%22Park%2C+Sang+J%2E%22">Park, Sang J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> PARK.SangJun@nims.go.jp</i><br /><searchLink fieldCode="AR" term="%22Modak%2C+Rajkumar%22">Modak, Rajkumar</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gautam%2C+Ravi%22">Gautam, Ravi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Alasli%2C+Abdulkareem%22">Alasli, Abdulkareem</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hirai%2C+Takamasa%22">Hirai, Takamasa</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ando%2C+Fuyuki%22">Ando, Fuyuki</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nagano%2C+Hosei%22">Nagano, Hosei</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sepehri-Amin%2C+Hossein%22">Sepehri-Amin, Hossein</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Uchida%2C+Ken-ichi%22">Uchida, Ken-ichi</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> UCHIDA.Kenichi@nims.go.jp</i>
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  Data: <searchLink fieldCode="JN" term="%22Acta+Materialia%22">Acta Materialia</searchLink>. Dec2025, Vol. 301, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Nernst+effect%22">Nernst effect</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+harvesting%22">Energy harvesting</searchLink><br /><searchLink fieldCode="DE" term="%22Waste+heat%22">Waste heat</searchLink><br /><searchLink fieldCode="DE" term="%22Thermoelectric+apparatus+%26+appliances%22">Thermoelectric apparatus & appliances</searchLink><br /><searchLink fieldCode="DE" term="%22Amorphous+substances%22">Amorphous substances</searchLink><br /><searchLink fieldCode="DE" term="%22Thermoelectric+effects%22">Thermoelectric effects</searchLink><br /><searchLink fieldCode="DE" term="%22Soft+magnetic+materials%22">Soft magnetic materials</searchLink><br /><searchLink fieldCode="DE" term="%22Clean+energy%22">Clean energy</searchLink>
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  Data: The global shift towards a carbon-neutral society has accelerated the demand for green energy, driving research into efficient technologies for harvesting energy from low-grade waste heat. Recently, transverse thermoelectrics based on the anomalous Nernst effect (ANE) has gained attention due to their simple device structure, scalability, and manufacturing-friendly nature. While topological single crystals and epitaxial films have been the focus for enhancing the ANE-driven thermoelectric performance, further improvements in material design are necessary for practical applications. Here, we report an easy-to-implement strategy for designing mechanically flexible transverse thermoelectric materials by creating amorphous-crystalline heterogeneous composites. We fabricated and optimized the heterogeneous composites through controlled heat treatment, achieving a significant enhancement of the anomalous Nernst coefficient, while maintaining flexibility. Additionally, the developed materials showed sufficiently large coercivity enabling operation of materials in devices under zero external magnetic field. Using the developed material, we constructed a single-material-based coiled device and demonstrated zero-field operation of the ANE-based energy harvesting from curved heat sources. These results validate the feasibility of using the ANE-based flexible materials for energy harvesting applications. [Display omitted] [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Acta Materialia is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.actamat.2025.121422
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Nernst effect
        Type: general
      – SubjectFull: Energy harvesting
        Type: general
      – SubjectFull: Waste heat
        Type: general
      – SubjectFull: Thermoelectric apparatus & appliances
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      – SubjectFull: Amorphous substances
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      – SubjectFull: Thermoelectric effects
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      – SubjectFull: Soft magnetic materials
        Type: general
      – SubjectFull: Clean energy
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      – TitleFull: Designing flexible magnetic materials for zero-magnetic-field operation of the anomalous Nernst effect.
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            – D: 01
              M: 12
              Text: Dec2025
              Type: published
              Y: 2025
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