20.500.12556/RUL-147223 Crystal structure and ferromagnetism of the CeFe$_9$Si$_4$ intermetallic compound We have determined the crystal structure and the magnetic state of the CeFe$_9$Si$_4$ 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 CeFe$_9$Si$_4$ 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 T$_C$. The ferromagnetic phase of CeFe$_9$Si$_4$ is magnetically soft. crystal structure diffraction magnetic properties phase transitions intermetallic compounds quantum mechanics kristalna struktura true false true Angleški jezik Slovenski jezik Članek v reviji 2023-06-27 08:25:25 2023-06-27 08:25:32 2023-06-28 03:35:12 0000-00-00 00:00:00 2023 0 0 Str. 6169-6180 iss. 15 Vol. 62 Apr. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 537 1520-510X 10.1021/acs.inorgchem.3c00547 148177411 acs.inorgchem.3c00547.pdf acs.inorgchem.3c00547.pdf 1 E106620690102CB35A0532E755220E72 e5e66f2bf608052000befb6d0c46beac83c6e3833520d8c8daec9e7dedc40347 a8746c3a-14b3-11ee-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=170715 https://pubs.acs.org/doi/10.1021/acs.inorgchem.3c00547 1 075d80a0-14b3-11ee-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=170714 Fakulteta za matematiko in fiziko 0 0 0