Seminarium Oddziału Badań Magnetyków
Microsoft Teams
Magnetic phase diagrams of noncentrosymmetric CeCo1-xFexGe3 and Ce1-xPrxCoGe3 series of alloys
dr Przemysław Skokowski
Instytut Fizyki Molekularnej Polskiej Akademii Nauk w Poznaniu
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Streszczenie:
Noncentrosymmetric heavy fermions are attracting the attention of scientists for their interesting properties, such as unconventional superconductivity and complex magnetic structures. One of the widely studied and fascinating group of intermetallic compounds is the series RTGe3 with the BaNiSn3-type of crystal structure. During my presentation I will introduce physical properties of two series of alloys: CeCo1-xFexGe3 and Ce1-xPrxCoGe3. The CeCo1-xFexGe3 series covers the transition from antiferromagnetic CeCoGe3 to heavy fermion CeFeGe3. In this system the investigation was focused on determining the role of the 3d element in magnetism of this group of compounds [1, 2]. This series can be represented by the Doniach diagram, therefore our studies also include searching for signatures of a quantum critical point as a non-Fermi liquid behavior. In the Ce1-xPrxCoGe3 series physical properties evolve from antiferromagnetic CeCoGe3 to paramagnetic PrCoGe3 [3]. In this case, the main goal was to identify the role of 4f elements in the magnetism, while also studying the paramagnetic state of Pr. Finally, I will indicate new series belonging to the RCoGe3 group, which may extend the understanding of the properties of these compounds.
[1] P. Skokowski, K. Synoradzki, M. Werwinski, A. Bajorek, G. Chełkowska, T. Toliński, Electronic structure of CeCo1−xFexGe3 studied by X-ray photoelectron spectroscopy and first-principles calculations, J. Alloy. Compd. 787 (2019) 744.
[2] P. Skokowski, K. Synoradzki, T. Toliński, Comprehensive studies of the transformation between antiferromagnetic CeCoGe3 and heavy fermion CeFeGe3 compounds, J. Alloy. Compd. 810 (2019) 151850.
[3] P. Skokowski, K. Synoradzki, M. Werwiński, T. Toliński, A. Bajorek, G. Chełkowska, Influence of Pr substitution on the physical properties of the Ce1-xPrxCoGe3 system: Combined experimental and first-principles study, Phys. Rev. B 102 (2020) 245127.
