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Magnetic properties of the Laves-type phases Ti2Co3Si and Ti2Fe3Si and their solid solution

Hamm, Christin M. and Gölden, Dominik and Hildebrandt, Erwin and Weischenberg, Jürgen and Zhang, Hongbin and Alff, Lambert and Birkel, Christina S. (2016):
Magnetic properties of the Laves-type phases Ti2Co3Si and Ti2Fe3Si and their solid solution.
In: J. Mater. Chem. C, Royal Society of Chemistry, pp. 7430-7435, 4, (31), ISSN 2050-7526, [Online-Edition: https://doi.org/10.1039/c6tc02043g],
[Article]

Abstract

Interest in Fe and Co containing Laves-type phases arises from their promising magnetic properties, especially in the context of magnetostrictive and magnetocaloric materials. Most compounds that are used for these applications consist of rare earth elements that are economically and environmentally problematic. Ti2Co3Si and Ti2Fe3Si are therefore attractive rare earth-free candidates, however their magnetic behavior has not been studied in full detail yet. Consequentially, we have prepared the full solid solution between both phases by arc melting and spark plasma sintering. The samples were subject to comprehensive investigation by means of synchrotron X-ray diffraction, EDX analysis and SQUID measurements. The magnetic properties of the mostly single phase materials generally follow a clear trend with an increase in the magnetic moment with increasing Fe content. Interestingly, we found a sudden drop in magnetic moment between samples Ti2Fe3Si and Ti-2(Co0.2Fe0.8)(3)Si. This phase transition from the ferromagnetic to the antiferromagnetic configuration for these compositions can indeed be confirmed by theoretical calculations.

Item Type: Article
Erschienen: 2016
Creators: Hamm, Christin M. and Gölden, Dominik and Hildebrandt, Erwin and Weischenberg, Jürgen and Zhang, Hongbin and Alff, Lambert and Birkel, Christina S.
Title: Magnetic properties of the Laves-type phases Ti2Co3Si and Ti2Fe3Si and their solid solution
Language: English
Abstract:

Interest in Fe and Co containing Laves-type phases arises from their promising magnetic properties, especially in the context of magnetostrictive and magnetocaloric materials. Most compounds that are used for these applications consist of rare earth elements that are economically and environmentally problematic. Ti2Co3Si and Ti2Fe3Si are therefore attractive rare earth-free candidates, however their magnetic behavior has not been studied in full detail yet. Consequentially, we have prepared the full solid solution between both phases by arc melting and spark plasma sintering. The samples were subject to comprehensive investigation by means of synchrotron X-ray diffraction, EDX analysis and SQUID measurements. The magnetic properties of the mostly single phase materials generally follow a clear trend with an increase in the magnetic moment with increasing Fe content. Interestingly, we found a sudden drop in magnetic moment between samples Ti2Fe3Si and Ti-2(Co0.2Fe0.8)(3)Si. This phase transition from the ferromagnetic to the antiferromagnetic configuration for these compositions can indeed be confirmed by theoretical calculations.

Journal or Publication Title: J. Mater. Chem. C
Volume: 4
Number: 31
Publisher: Royal Society of Chemistry
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
11 Department of Materials and Earth Sciences > Material Science > Theory of Magnetic Materials
07 Department of Chemistry
07 Department of Chemistry > Fachgebiet Anorganische Chemie
Date Deposited: 08 Aug 2017 09:19
Official URL: https://doi.org/10.1039/c6tc02043g
Identification Number: doi:10.1039/c6tc02043g
Funders: Use of the Advanced Photon Source at Argonne National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357., Financial support by the German federal state of Hessen through its excellence program LOEWE "RESPONSE'' is gratefully acknowledged.
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