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Influence of Mn content on the magnetic properties of the hexagonal Mn (Co,Ge)2 phase
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science and Engineering, Solid State Physics.ORCID iD: 0000-0003-3574-2146
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.ORCID iD: 0000-0002-8107-4110
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Inorganic Chemistry.ORCID iD: 0000-0002-6486-5156
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science and Engineering, Solid State Physics.ORCID iD: 0000-0002-3049-6831
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2023 (English)In: Scripta Materialia, ISSN 1359-6462, E-ISSN 1872-8456, Vol. 233, article id 115534Article in journal (Refereed) Published
Abstract [en]

Herein, we report on the effect of Mn content on the magnetic properties of the hexagonal Mn(Co,Ge)2 with composition Mn36+xCo49-xGe15.This compound was previously described as Mn2Co3Ge (MgZn2-type structure), but later as Mn(Co,Ge)2 with its own structure type, all samples in this work follow the same superstructure model. Samples were synthesized by induction melting, the crystal structures were evaluated using a combination of X-ray diffraction together with scanning electron microscopy equipped and an energy dispersive X-ray spectroscopy detector. The Curie temperature (TC) is shifted towards lower temperature as the Mn content is increased. On the other hand, the spin reorientation temperature (TSRT) increases and the magnetic moment decreases as the Mn content is increased. The magnetocaloric properties were investigated for the x = 1 alloy, Mn37Co48Ge15. It was found that the isothermal entropy change is 2 J kg−1 K−1 at room temperature for an applied field of 5 T.

Place, publisher, year, edition, pages
Elsevier, 2023. Vol. 233, article id 115534
Keywords [en]
Permanent magnets, Intermetallic compound, Synthesis, Magnetocalloric properties, Crystal structure
National Category
Condensed Matter Physics Inorganic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-504952DOI: 10.1016/j.scriptamat.2023.115534ISI: 001001481400001OAI: oai:DiVA.org:uu-504952DiVA, id: diva2:1770590
Funder
Swedish Foundation for Strategic Research, EM16-0039Swedish Research Council, 2019-00207Available from: 2023-06-19 Created: 2023-06-19 Last updated: 2023-06-19Bibliographically approved

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Hedlund, DanielRosenqvist Larsen, SimonSahlberg, MartinSvedlindh, PeterShtender, Vitalii

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