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This study reports the fabrication of Gd3Fe5O12 ferrimagnetic ceramic by magnetic slip casting under applied magnetic fields of 1T and 12T, followed by solid-state sintering. Structural, microstructural, and magnetic properties were investigated using X-ray diffraction, scanning and transmission electron microscopy, Mössbauer spectroscopy, and magnetometry. XRD and SAED confirmed the presence of single-phase cubic garnet in the dense bulk ceramic with no detectable crystallographic texture. Rietveld analysis revealed relatively large crystallite sizes in the range of 165-350 nm. SEM observations showed that magnetic fields during magnetic slip casting, especially of high value (12T), promote the organization of local mesoscale grain assemblies with a preferential spatial arrangement, forming two-dimensional magnetically correlated regions. Magnetic measurements indicate that this mesoscale structure significantly affects the low-field magnetic behavior, as evidenced by pronounced ZFC-FC irreversibility and anisotropic magnetic response. Despite distinct magnetic relaxation patterns caused by microstructural differences, all magnetic slip-casted samples exhibit the same elevated compensation temperature (θC = 336 K), which is primarily attributed to the large crystallite sizes achieved through the processing route. Comparison with the 0T slip-casted reference sample indicates that the enhanced compensation behaviour is primarily associated with the processing-induced local structural/microstructural state rather than directly with the applied magnetic field. These findings demonstrate that magnetic slip casting is a practical method for engineering magnetic properties in rare-earth iron garnet ceramics by designing their microstructure at the mesoscale.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Gd3Fe5O12 garnet, Magneto-processing, Compensation temperature, Magnetic properties, Microstructure

刊行年月日: 2026-07-17

出版者: Elsevier BV

掲載誌:

• Ceramics International (ISSN: 02728842) vol. 52 issue. 25 p. 44114-44125

研究助成金:

• Japan Society for the Promotion of Science
• Executive Unit for Financing Higher Education Research Development and Innovation

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1016/j.ceramint.2026.07.297

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更新時刻: 2026-10-14 14:30:10 +0900

MDRでの公開時刻: 2026-10-14 12:30:30 +0900