Download file (3.68 MB)
Download as zip (3.36 MB)

Collection

Citation

Description:

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.

Rights:

• Creative Commons BY-NC Attribution-NonCommercial 4.0 International
  

Keyword: magnetocaloric effect, magnetic anisotropy, mean-field approach

Date published: 2025-12-31

Publisher: Taylor & Francis

Journal:

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

Funding:

Manuscript type: Author's version (Accepted manuscript)

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

First published URL: https://doi.org/10.1080/14686996.2025.2517528

Related item:

Other identifier(s):

Contact agent:

Updated at: 2025-07-16 16:14:55 +0900

Published on MDR: 2025-06-12 12:21:17 +0900