镍锰铟锑合金通过定向凝固产生的巨大磁熵变化及第一性原理计算结果

IF 2.7 3区 物理与天体物理 Q2 PHYSICS, APPLIED
Fanghua Tian, Kaiyan Cao, Kaiyun Chen, Sen Kong, Zhiyong Dai, Qizhong Zhao, Minxia Fang, Xiaoqin Ke, Chao Zhou, Yin Zhang, Sen Yang
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引用次数: 0

摘要

在这项工作中,通过定向凝固,Ni50Mn36In5Sb9 合金中的磁致效应增加了 50%以上,在 5 T 磁场下,磁熵增大到 36.2 J kg-1 K-1;差示扫描量热曲线的计算结果证实了熵变的增强,也从 29.7 J kg-1 K-1 增加到 40.7 J kg-1 K-1。此外,第一性原理计算表明,在室温下,沿 L21(220)面的表面形成能最低,容易从(220)晶面形成并发生马氏体转变。定向凝固使合金基本上向(220)晶面生长,改善了原子有序性,减少了晶界,增大了晶粒尺寸。因此,磁熵变化得到了增强。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Large magnetic entropy change in Ni–Mn–In–Sb alloys via directional solidification and calculated by first-principles calculations
In this work, the magnetocaloric effect in Ni50Mn36In5Sb9 alloy was increased by more than 50% through directional solidification, and the magnetic entropy change increased to 36.2 J kg−1 K−1 under the field of 5 T. The calculated results of differential scanning calorimetry curves confirmed the enhanced entropy change, which also increased from 29.7 to 40.7 J kg−1 K−1. Moreover, first-principles calculations show that the surface formation energy along the L21 (220) plane is the lowest at room temperature, and it is easy to form and undergo martensitic transformation from the (220) crystal plane. Directional solidification causes the alloy to grow basically toward the (220) crystal plane, improve atomic ordering, reduce grain boundaries, and increase grain size. Thereby, the magnetic entropy change is enhanced.
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来源期刊
Journal of Applied Physics
Journal of Applied Physics 物理-物理:应用
CiteScore
5.40
自引率
9.40%
发文量
1534
审稿时长
2.3 months
期刊介绍: The Journal of Applied Physics (JAP) is an influential international journal publishing significant new experimental and theoretical results of applied physics research. Topics covered in JAP are diverse and reflect the most current applied physics research, including: Dielectrics, ferroelectrics, and multiferroics- Electrical discharges, plasmas, and plasma-surface interactions- Emerging, interdisciplinary, and other fields of applied physics- Magnetism, spintronics, and superconductivity- Organic-Inorganic systems, including organic electronics- Photonics, plasmonics, photovoltaics, lasers, optical materials, and phenomena- Physics of devices and sensors- Physics of materials, including electrical, thermal, mechanical and other properties- Physics of matter under extreme conditions- Physics of nanoscale and low-dimensional systems, including atomic and quantum phenomena- Physics of semiconductors- Soft matter, fluids, and biophysics- Thin films, interfaces, and surfaces
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