Anisotropic magnetocaloric effect and first- principle calculations on Nd2Fe14B

IF 2.1 4区物理与天体物理 Q3 PHYSICS, CONDENSED MATTER

Solid State Communications Pub Date : 2025-03-27 DOI:10.1016/j.ssc.2025.115935

M.M. Elkenany , S.H. Aly , Sherif Yehia , Doug Westmoreland , Fatema Z. Mohammad

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引用次数: 0

Abstract

This theoretical study investigates the effect of magnetic anisotropy on magnetic and magnetothermal properties of Nd₂Fe₁₄B in the temperature range of 78–293 K. Using a classical statistical mechanics based model and the DFT calculations using the VASP code, we determined: magnetization, total heat capacity and magnetocaloric effects (e.g. (ΔS_m) and (ΔT_ad) versus temperature and field strength, along the crystallographic directions [110], [100] and [001]. Electronic and phonon densities of states (DOS) were calculated to determine the electronic heat capacity coefficient and Debye temperature. Elastic constants, bulk and shear moduli were also obtained along with longitudinal, transverse and average sound velocities. Notably our results reveal a maximum ΔT_ad of 10.5 K in a 3 T field near the spin reorientation temperature along [110], with a relative cooling power RCP (T) of 276 K²

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来源期刊

Solid State Communications 物理-物理：凝聚态物理

CiteScore

3.40

自引率

4.80%

发文量

287

审稿时长

51 days

期刊介绍： Solid State Communications is an international medium for the publication of short communications and original research articles on significant developments in condensed matter science, giving scientists immediate access to important, recently completed work. The journal publishes original experimental and theoretical research on the physical and chemical properties of solids and other condensed systems and also on their preparation. The submission of manuscripts reporting research on the basic physics of materials science and devices, as well as of state-of-the-art microstructures and nanostructures, is encouraged. A coherent quantitative treatment emphasizing new physics is expected rather than a simple accumulation of experimental data. Consistent with these aims, the short communications should be kept concise and short, usually not longer than six printed pages. The number of figures and tables should also be kept to a minimum. Solid State Communications now also welcomes original research articles without length restrictions. The Fast-Track section of Solid State Communications is the venue for very rapid publication of short communications on significant developments in condensed matter science. The goal is to offer the broad condensed matter community quick and immediate access to publish recently completed papers in research areas that are rapidly evolving and in which there are developments with great potential impact.