Crystal Structure and Ferromagnetism of the CeFe₉Si₄ Intermetallic Compound
In: ISSN: 0020-1669, 2023
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Zugriff:
International audience ; We have determined the crystal structure and the magnetic state of the CeFe9Si4 intermetallic compound. Our revised structural model (fully ordered tetragonal unit cell, I4/mcm) agrees with the previous literature report, except for some minor quantitative differences. Magnetically, the CeFe9Si4 undergoes a ferromagnetic transition at the temperature TC ≈ 94 K. Ferromagnetism in the combined Ce–Fe spin system is a result of interplay between the localized magnetism of the Ce sublattice and the Fe band (itinerant) magnetism. Ferromagnetic ordering obeys the rather general rule that the exchange spin coupling between atoms possessing more than half-full d shells with atoms possessing less than half-full d shells is antiferromagnetic (where the Ce atoms are considered as light d elements). Since in rare-earth metals from the light half of the lanthanide series, the magnetic moment is directed opposite to the spin, this results in ferromagnetism. The magnetoresistance and the magnetic specific heat show an additional temperature-dependent feature (a shoulder) deep inside the ferromagnetic phase that is considered to originate from the influence of the magnetization on the electronic band structure via the magnetoelastic coupling, which alters the Fe band magnetism below TC. The ferromagnetic phase of CeFe9Si4 is magnetically soft.
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Crystal Structure and Ferromagnetism of the CeFe₉Si₄ Intermetallic Compound
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Autor/in / Beteiligte Person: | Koželj, Primož ; Vrtnik, Stanislav ; Boutbien, Justine ; Luzar, Jože ; Jelen, Andreja ; Parapari, Sorour Semsari ; Boulet, Pascal ; de Weerd, Marie-Cécile ; Lengaigne, Gwladys ; Wencka, Magdalena ; Fournée, Vincent ; Ledieu, Julian ; Šturm, Sašo ; Dolinšek, Janez ; Jozef Stefan Institute Ljubljana (IJS) ; University of Ljubljana ; Institut Jean Lamour (IJL) ; Institut de Chimie - CNRS Chimie (INC-CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) ; Polish Academy of Sciences Poznan, Poland (PAS) ; The Slovenian authors acknowledge financial support from the Slovenian Research Agency (research core funding no. P1-0125 and P2-0084). This work is a result of a cooperation within the French–Slovene collaboration established under the International Research Project (IRP) Push-Pull Alloys and Complex Compounds (PACS2). The INC CNRS and the Université de Lorraine are acknowledged for financially supporting the IRP PACS2. ; Push-Pull alloys and Complex Compounds: from bulk properties to surface functions (IRP PACS2) |
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Zeitschrift: | ISSN: 0020-1669, 2023 |
Veröffentlichung: | HAL CCSD ; American Chemical Society, 2023 |
Medientyp: | academicJournal |
DOI: | 10.1021/acs.inorgchem.3c00547 |
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