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Magnetic refrigeration is a cooling technology that utilizes the magnetocaloric effect, in which a change in the magnetic field applied to a magnetic material induces a temperature change. Compared with gas-based refrigeration, it offers higher theoretical efficiency and fewer restrictions related to refrigerant gases. Active Magnetic Refrigeration (AMR) employs magnetic materials as both regenerator and refrigerant to cover a wide temperature range. However, the requirement of a large magnetic field variation exceeding 1 T and the necessity of stacking multiple materials to broaden the operating temperature range remain significant challenges toward practical implementation. We designed a stationary magnetic refrigeration system composed of an AC superconducting magnet to generate the alternating magnetic field required for the cycle, a DC superconducting magnet to control the operating temperature range, and the magnetic refrigerant. Therefore, we propose a stationary magnetic refrigeration system employing metamagnetic materials, which can exhibit a large magnetocaloric effect even under a field variation of only about 1 T. We constructed a numerical simulation model of metamagnetic refrigeration and evaluated the cooling capacity.

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Keyword: 磁気冷凍, 交流損失, メタ磁性, 静止型

Conference: The 38th International Symposium on Superconductivity ISS2025 (2025-12-02 - 2025-12-04)

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Manuscript type: Not a journal article

MDR DOI: https://doi.org/10.48505/nims.6112

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Updated at: 2026-01-07 14:23:50 +0900

Published on MDR: 2026-01-07 16:20:29 +0900