通过诱导的锡磁矩探测非化学计量比的镍锰锡赫斯勒合金中沉淀物的形成。

Formation of precipitates in off-stoichiometric Ni-Mn-Sn Heusler alloys probed through the induced Sn-moment.

作者信息

Eggert Benedikt, Çakır Aslı, Günzing Damian, Josten Nicolas, Scheibel Franziska, Brand Richard A, Farle Michael, Acet Mehmet, Wende Heiko, Ollefs Katharina

机构信息

Faculty of Physics, Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen Lotharstr. 1 47057 Duisburg Germany

Department of Metallurgical and Materials Engineering, Muğla Sıtkı Koçman University 48000 Mugla Turkey.

出版信息

RSC Adv. 2023 Jun 15;13(27):18217-18222. doi: 10.1039/d3ra01420g.

DOI:10.1039/d3ra01420g

PMID:37333792

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10269055/

Abstract

The shell-ferromagnetic effect originates from the segregation process in off-stoichiometric Ni-Mn-based Heusler alloys. In this work, we investigate the precipitation process of L2-ordered NiMnSn and L1-ordered NiMn in off-stoichiometric NiMnSn during temper annealing, by X-ray diffraction (XRD) and Sn Mössbauer spectroscopy. While XRD probes long-range ordering of the lattice structure, Mössbauer spectroscopy probes nearest-neighbour interactions, reflected in the induced Sn magnetic moment. As shown in this work, the induced magnetic Sn moment can be used as a detector for microscopic structural changes and is, therefore, a powerful tool for investigating the formation of nano-precipitates. Similar research can be performed in the future, for example, on different pinning type magnets like Sm-Co or Nd-Fe-B.

摘要

壳层铁磁效应源于非化学计量比的镍锰基赫斯勒合金中的偏析过程。在本工作中，我们通过X射线衍射（XRD）和锡穆斯堡尔谱，研究了非化学计量比的NiMnSn在回火退火过程中L2有序的NiMnSn和L1有序的NiMn的析出过程。XRD探测晶格结构的长程有序，而穆斯堡尔谱探测最近邻相互作用，这反映在诱导的锡磁矩上。如本工作所示，诱导的磁性锡矩可作为微观结构变化的探测器，因此是研究纳米析出物形成的有力工具。未来可以进行类似的研究，例如，针对不同的钉扎型磁体，如钐钴或钕铁硼。