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Materials with magnetic anisotropy can serve as a model object for exploring the multicaloric effect because their thermodynamic state alterations can be achieved either through the application of a magnetic field H, or by mechanically rotating the sample in the magnetic field using torque τ. In such materials, the total entropy change 𝛥⁢𝑆𝑇 arises from two distinct contributions: (1) the conventional magnetocaloric effect (MCE) or paraprocess 𝛥⁢𝑆|𝑚| and (2) the rotational MCE 𝛥⁢𝑆𝜑. In this manuscript, using molecular field model which enables a separation of contributions to the total entropy change 𝛥⁢𝑆𝑇 from conventional 𝛥⁢𝑆|𝑚| and rotational 𝛥⁢𝑆𝜑, we have determined cross-coupling multicaloric coefficients 𝜒𝜏,𝐻=(
∂𝜏
∂𝐻

)𝑇,𝜃 and 𝜒𝐻,𝜏=−(
∂𝑚
∂𝜃

)𝑇,𝐻 for anisotropic magnetic materials and show that they satisfy the basic thermodynamic identities. We also confirmed that the total multicaloric effect in the material with magnetic anisotropy can be accurately expressed as the sum of the individual magnetocaloric effects induced by separate application of the H and τ, minus the magnetic entropy change arising from thermodynamic cross-coupling between the subsystems of the solid: 𝛥⁢𝑆𝑇=𝛥⁢𝑆(𝐻)
𝑇,𝜏+𝛥⁢𝑆(𝜃)
𝑇,𝐻−𝛥⁢𝑆𝑐𝑜𝑢𝑝𝑙𝑖𝑛𝑔.

権利情報:

• Creative Commons BY-NC Attribution-NonCommercial 4.0 International
  

キーワード: magnetocaloric effect, magnetic anisotropy, mean-field approach

刊行年月日:

出版者: Taylor & Francis

掲載誌:

• Science and Technology of Advanced Material (ISSN: 14686996) vol. 26 2517528

研究助成金:

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5533

公開URL: https://doi.org/10.1080/14686996.2025.2517528

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更新時刻: 2025-06-12 10:48:48 +0900

MDRでの公開時刻: 2025-06-12 12:21:17 +0900