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钯替代锰对MnPdCoGe合金（其中x = 0.03、0.05、0.07和0.1）结构和热磁性能的影响

The Effect of Substitution of Mn by Pd on the Structure and Thermomagnetic Properties of the MnPdCoGe Alloys (Where x = 0.03, 0.05, 0.07 and 0.1).

作者信息

Kutynia Karolina, Przybył Anna, Gębara Piotr

机构信息

Department of Physics, Częstochowa University of Technology, Armii Krajowej 19, 42-200 Częstochowa, Poland.

出版信息

Materials (Basel). 2023 Jul 31;16(15):5394. doi: 10.3390/ma16155394.

DOI:10.3390/ma16155394
PMID:37570098
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10419926/
Abstract

In the present paper, the influence of partial substitution of Mn by Pd on structure, thermomagnetic properties, and phase transitions in the MnCoGe alloys was investigated. The studies of phase constitution revealed an occurrence of the orthorhombic TiNiSi-type and hexagonal NiTi- type phases. Deep analysis of the XRD pattern supported by the Rietveld analysis allowed us to notice the changes in lattice parameters and quantity of recognized phases depending on the Pd content. An increase of palladium in alloy composition at the expense of manganese induced a rise in the Curie temperature. The values of ΔS measured for the variation of external magnetic field ~5 T equaled 8.88, 23.99, 15.63, and 11.09 for MnPdCoGe, MnPdCoGe, MnPdCoGe, and MnPdCoGe alloy, respectively. The highest magnetic entropy change ΔS was observed for samples with Pd content x = 0.05 induced by magnetostructural transformation. The analysis of the vs. curves allowed confirmation of the XRD and DSC results of an occurrence of the first-order magnetostructural transition in MnPdCoGe and MnPdCoGe alloys samples.

摘要

在本文中，研究了用钯部分替代锰对MnCoGe合金的结构、热磁性能和相变的影响。相组成研究表明出现了正交TiNiSi型和六方NiTi型相。由Rietveld分析支持的XRD图谱深度分析使我们能够注意到晶格参数和已识别相的数量随钯含量的变化。合金成分中以锰为代价增加钯会导致居里温度升高。对于MnPdCoGe、MnPdCoGe、MnPdCoGe和MnPdCoGe合金，在约5 T的外部磁场变化下测量的ΔS值分别等于8.88、23.99、15.63和11.09。对于钯含量x = 0.05的样品，由于磁结构转变观察到最高的磁熵变ΔS。对 与 曲线的分析证实了MnPdCoGe和MnPdCoGe合金样品中发生一级磁结构转变的XRD和DSC结果。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3849/10419926/4f0eff3d98b0/materials-16-05394-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3849/10419926/249225addc07/materials-16-05394-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3849/10419926/d432ec981488/materials-16-05394-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3849/10419926/945e8aef04f5/materials-16-05394-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3849/10419926/4c5b19990b58/materials-16-05394-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3849/10419926/6a66204b4eb9/materials-16-05394-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3849/10419926/90e98987c30d/materials-16-05394-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3849/10419926/4f0eff3d98b0/materials-16-05394-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3849/10419926/249225addc07/materials-16-05394-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3849/10419926/d432ec981488/materials-16-05394-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3849/10419926/945e8aef04f5/materials-16-05394-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3849/10419926/4c5b19990b58/materials-16-05394-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3849/10419926/6a66204b4eb9/materials-16-05394-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3849/10419926/90e98987c30d/materials-16-05394-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3849/10419926/4f0eff3d98b0/materials-16-05394-g007.jpg

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2
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Materials (Basel). 2021 Jan 4;14(1):185. doi: 10.3390/ma14010185.
3
Preparation of LaCaSrMnO₃ Manganites by Four Synthesis Methods and Their Influence on the Magnetic Properties and Relative Cooling Power.
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Materials (Basel). 2019 Jan 19;12(2):309. doi: 10.3390/ma12020309.
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A quantitative criterion for determining the order of magnetic phase transitions using the magnetocaloric effect.利用磁热效应确定磁相变顺序的定量判据。
Nat Commun. 2018 Jul 11;9(1):2680. doi: 10.1038/s41467-018-05111-w.
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Giant magnetocaloric effect driven by structural transitions.由结构相变驱动的巨磁热效应。
Nat Mater. 2012 Jul;11(7):620-6. doi: 10.1038/nmat3334.