【公開日：2024.07.25】【最終更新日：2024.05.25】
課題データ / Project Data
課題番号 / Project Issue Number
23NM5332
利用課題名 / Title
希土類フリー/低希土類永久磁石材料の開発
利用した実施機関 / Support Institute
物質・材料研究機構 / NIMS
機関外・機関内の利用 / External or Internal Use
内部利用（ARIM事業参画者以外）/Internal Use (by non ARIM members)
技術領域 / Technology Area
【横断技術領域 / Cross-Technology Area】（主 / Main）計測・分析/Advanced Characterization（副 / Sub）-
【重要技術領域 / Important Technology Area】（主 / Main）革新的なエネルギー変換を可能とするマテリアル/Materials enabling innovative energy conversion（副 / Sub）-
キーワード / Keywords
Permanent Magnets,エネルギー貯蔵/ Energy storage,X線回折/ X-ray diffraction,熱電発電/ Thermoelctric Power Generation
利用者と利用形態 / User and Support Type
利用者名（課題申請者）/ User Name (Project Applicant)
Sepehri Amin Hossein
所属名 / Affiliation
物質・材料研究機構
共同利用者氏名 / Names of Collaborators in Other Institutes Than Hub and Spoke Institutes
ARIM実施機関支援担当者 / Names of Collaborators in The Hub and Spoke Institutes
廣戸孝信
利用形態 / Support Type
（主 / Main）技術代行/Technology Substitution（副 / Sub）-
利用した主な設備 / Equipment Used in This Project
報告書データ / Report
概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)
Magnetic materials are essential component for the green energy conversions. The functionality of magnetic materials is realized by engineering the magnetic and thermal hysteresis. In this research, we have investigated materials with lean from rare-earth with excellent intrinsic magnetic properties and conducted microstructure and alloy design to convert excellent intrinsic magnetic properties to the extrinsic ones, in particular hysteresis control of the materials. This research is focused on permanent magnets as well as magnetocaloric materials for efficient magnetic cooling.
実験 / Experimental
We have used XRD (SmartLab (45 kV, 200 mA, CuKα)) and study the microstructure change of the materials at a wide temperature range.
結果と考察 / Results and Discussion
The origin of thermal hysteresis was investigated. For this purpose, Fe2P-based materials with different thermal hysteresis were studied. It was found that the residual high-temperature phase during the cooling cycle is the main origin for minimizing the thermal hysteresis in our materials. Moreover, how the thermal hysteresis can be minimized by sub-lattice engineering. This fundamental research is important to design the hysteresis to realize reversible performance in the magnetic and magnetocaloric materials.
図・表・数式 / Figures, Tables and Equations
その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)
We acknowledge the support from the common use facility division of NIMS.
成果発表・成果利用 / Publication and Patents
論文・プロシーディング（DOIのあるもの） / DOI (Publication and Proceedings)
口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.
特許 / Patents
特許出願件数 / Number of Patent Applications：0件
特許登録件数 / Number of Registered Patents：0件