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[Ken-ichi Uchida](https://orcid.org/0000-0001-7680-3051), [Yuya Sakuraba](https://orcid.org/0000-0003-4618-9550), [Hossein Sepehri-Amin](https://orcid.org/0000-0002-7856-7897)

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[Foreword to the focus issue: materials science and technology for magnetic thermal management](https://mdr.nims.go.jp/datasets/5b76984e-03ae-4536-aca6-a39325ab5cee)

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Foreword to the focus issue: materials science and technology for magnetic thermal managementScience and Technology of Advanced MaterialsISSN: 1468-6996 (Print) 1878-5514 (Online) Journal homepage: www.tandfonline.com/journals/tsta20Foreword to the focus issue: materialsscience and technology for magnetic thermalmanagementKen-ichi Uchida, Yuya Sakuraba & Hossein Sepehri-AminTo cite this article: Ken-ichi Uchida, Yuya Sakuraba & Hossein Sepehri-Amin (2025) Foreword tothe focus issue: materials science and technology for magnetic thermal management, Scienceand Technology of Advanced Materials, 26:1, 2604891, DOI: 10.1080/14686996.2025.2604891To link to this article:  https://doi.org/10.1080/14686996.2025.2604891© 2026 The Author(s). Published by NationalInstitute for Materials Science in partnershipwith Taylor & Francis Group.Published online: 08 Jan 2026.Submit your article to this journal Article views: 257View related articles View Crossmark dataFull Terms & Conditions of access and use can be found athttps://www.tandfonline.com/action/journalInformation?journalCode=tsta20https://www.tandfonline.com/journals/tsta20?src=pdfhttps://www.tandfonline.com/action/showCitFormats?doi=10.1080/14686996.2025.2604891https://doi.org/10.1080/14686996.2025.2604891https://www.tandfonline.com/action/authorSubmission?journalCode=tsta20&show=instructions&src=pdfhttps://www.tandfonline.com/action/authorSubmission?journalCode=tsta20&show=instructions&src=pdfhttps://www.tandfonline.com/doi/mlt/10.1080/14686996.2025.2604891?src=pdfhttps://www.tandfonline.com/doi/mlt/10.1080/14686996.2025.2604891?src=pdfhttp://crossmark.crossref.org/dialog/?doi=10.1080/14686996.2025.2604891&domain=pdf&date_stamp=08%20Jan%202026http://crossmark.crossref.org/dialog/?doi=10.1080/14686996.2025.2604891&domain=pdf&date_stamp=08%20Jan%202026https://www.tandfonline.com/action/journalInformation?journalCode=tsta20FOCUS ISSUE FOREWORDForeword to the focus issue: materials science and technology for magnetic thermal managementKen-ichi Uchida a,b, Yuya Sakuraba a and Hossein Sepehri-Amin aaResearch Center for Magnetic and Spintronic Materials, National Institute for Materials Science, Tsukuba, Japan;  bDepartment of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, JapanMagnetic materials are used in various equipment and systems such as electric vehicle motors, power generators, and electronic devices, making them essential materials for human life. If omnipresent magnets could be used to directly convert heat into electricity, refrigerate other materials by applying a charge current or magnetic field, and actively control a heat flow, it would lead to innovative energy-saving and energy- creating technologies. In the Exploratory Research for Advanced Technology (ERATO) ‘UCHIDA Magnetic Thermal Management Materials’ project [1], one of the Strategic Basic Research Programs of Japan Science and Technology (JST), we are challenging the creation of future key technologies to effectively utilize the large amount of thermal energy that is being released unused, through interdisciplinary fusion studies. This Focus Issue aims to invigorate materials science contributing to thermal management technologies by simultaneously disseminating part of the achievements from this ERATO project and cutting- edge research outcomes from leading researchers worldwide in related fields.In recent years, principles for energy conversion and control utilizing the degree of freedom of spin, the origin of magnetism, have been discovered one after another in the field of spin caloritronics, which is based on the fusion of spintronics, thermoelectrics, and thermal transport physics [2–4]. Spin caloritronics has grown rapidly since the discovery of the spin Seebeck effect [5], i.e. spin current generation by a heat current, and various thermo-spin/magneto- thermoelectric effects have been observed subsequently. Most of the research on spin caloritronics reported to date has focused on fundamental physics, and significant progress has been made in elucidating the basic mechanisms of heat-spin-charge conversion through the studies on model materials. In contrast, the development of functional materials and thermal engineering applications has been limited so far. To bring spin caloritronics into practical applications, it is essential to create innovative energy materials capable of highly efficient thermal energy conversion, control, and transfer, and to establish thermal measurement and analysis technologies for designing such materials, in addition to further investigation of heat-spin-charge conversion principles.This Focus Issue comprises 11 original articles and 5 review articles reporting cutting-edge achievements in spin caloritronics and thermoelectrics [6–13], thermal switching/diode [14–16], magnetic refrigeration and caloric effects [17–19], and measurement technology development contributing to the advancement of these fields [20,21]. We anticipate that this Focus Issue contributes to the development of innovative materials and devices for the realization of a sustainable society.AcknowledgmentsAs guest editors, we would like to thank all authors and reviewers who have contributed to this Focus Issue. We also extend our gratitude to Prof. Yoshikazu Mizuguchi, Prof. Hosei Nagano, Dr. Takashi Yagi, Dr. Fuyuki Ando, Dr. Takamasa Hirai, and all ERATO participants for their contributions to the project. The works published in Refs. [7,9,12,14,18,20,21] were mainly supported by ERATO “UCHIDA Magnetic Thermal Management Materials” (No. JPMJER2201) from JST.Disclosure statementNo potential conflict of interest was reported by the author(s).ORCIDKen-ichi Uchida http://orcid.org/0000-0001-7680-3051Yuya Sakuraba http://orcid.org/0000-0003-4618-9550Hossein Sepehri-Amin http://orcid.org/0000-0002-7856- 7897CONTACT Ken-ichi Uchida UCHIDA.Kenichi@nims.go.jp Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, JapanSCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2025, VOL. 26, NO. 1, 2604891 https://doi.org/10.1080/14686996.2025.2604891© 2026 The Author(s). Published by National Institute for Materials Science in partnership with Taylor & Francis Group.  This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The terms on which this article has been published allow the posting of the Accepted Manuscript in a repository by the author(s) or with their consent.http://orcid.org/0000-0001-7680-3051http://orcid.org/0000-0003-4618-9550http://orcid.org/0000-0002-7856-7897http://www.tandfonline.comhttps://crossmark.crossref.org/dialog/?doi=10.1080/14686996.2025.2604891&domain=pdf&date_stamp=2026-01-07References[1] Available from: https://www.jst.go.jp/erato/uchida/ en/index.html [2] Bauer GEW, Saitoh E, van Wees BJ. Spin caloritronics. Nat Mater. 2012;11(5):391–399. doi:  10.1038/nmat3301  [3] Boona SR, Myers RC, Heremans JP. Spin caloritronics. Energy Environ Sci. 2014;7 (3):885–910. doi: 10.1039/C3EE43299H  [4] Uchida K. Transport phenomena in spin caloritronics. Proc Jpn Acad Ser B. 2021;97 (2):69–88. doi: 10.2183/pjab.97.004  [5] Uchida K, Takahashi S, Harii K, et al. Observation of the spin Seebeck effect. Nature. 2008;445 (7214):778–781. doi: 10.1038/nature07321  [6] Jha R, Tsujii N, Riss A, et al. High thermoelectric performance of p-type Fe2V0.8Mn0.2Al Heusler alloy thin films grown on insulating oxide substrates. Sci Technol Adv Mater. 2025;26(1):2512705. doi: 10. 1080/14686996.2025.2512705  [7] Madavali B, Ando F, Hirai T, et al. Systematic investigation on transverse thermoelectric conversion of RE2(Fe,Co)14B (RE = rare-earth) compounds. Sci Technol Adv Mater. 2025;26(1):2520162. doi: 10. 1080/14686996.2025.2520162  [8] Zink BL. Measurement and control of magnetic thin films and devices using thermal gradients applied via suspended Si-N membranes. 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Comparative experimental and theoretical study on anomalous Nernst effect of Heusler alloy Co2FeSi thin film: estimation of on-site Coulomb interaction at Co site. Sci Technol Adv Mater. 2025;26(1):2564061. doi: 10.1080/14686996.2025.2564061  [13] Bougiatioti P, Manos O, Reiss G, et al. Thermal spin transport phenomena and their correlation to magnetic properties of metallic Pt/Co1-xFex and Pt/Ni1-x Fex bilayers. Sci Technol Adv Mater. 2025;26 (1):2587389. doi: 10.1080/14686996.2025.2587389  [14] Arima H, Murakami T, Rani P, et al. Magneto- thermal switching using superconducting metals and alloys. Sci Technol Adv Mater. 2025;26(1):2506978. doi: 10.1080/14686996.2025.2506978  [15] Hirata K, Goto Y, Takeuchi T. Enhanced rectification effect in silver chalcogenide-based thermal diode by using precipitation/dissolution of Ag impurity across the structure phase transition. Sci Technol Adv Mater. 2025;26(1):2549674. doi: 10.1080/14686996. 2025.2549674  [16] Hirata K, Takeuchi T. Review of recent developments in capacitor-type heat flow switching devices. Sci Technol Adv Mater. 2025;26(1):2590797. doi: 10. 1080/14686996.2025.2590797  [17] Klunnikova Y, Karpenkov AY, Beckmann B, et al. Understanding multicaloric effects in anisotropic magnets via a mean-field approach. Sci Technol Adv Mater. 2025;26(1):2517528. doi: 10.1080/14686996. 2025.2517528  [18] Prusty MM, Molleti SH, Hiroto T, et al. Reduced hysteresis in La0.7Ce0.3Fe11.5Si1.5 hydrides by grain size reduction. Sci Technol Adv Mater. 2025;26 (1):2525742. doi: 10.1080/14686996.2025.2525742  [19] Duc NTM, Srikanth H, Phan MH. Low-dimensional magnetocaloric materials for energy-efficient magnetic refrigeration: does size matter? Sci Technol Adv Mater. 2025;26(1):2546287. doi: 10.1080/ 14686996.2025.2546287  [20] Arima H, Yamashita Y, Yagi T. Time-domain thermoreflectance technique using multiple delayed probe pulses for high-throughput data acquisition and analysis. Sci Technol Adv Mater. 2025;26 (1):2523240. doi: 10.1080/14686996.2025.2523240  [21] Nakamura N, Ando F, Uchida K, et al. Accurate and simple measurement of power generation efficiency and figure of merit of thermoelectric modules based on optical heating and non-contact temperature detection methods. Sci Technol Adv Mater. 2025;26(1):2551485. doi: 10.1080/14686996. 2025.2551485Sci. Technol. Adv. Mater. 26 (2025) 2                                                                                                                                                    K. 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