X-ray photoelectron spectroscopy and magnetic properties of Ce2Co15Mn3 compound

XPS on Gd1−xCexCo2 Intermetallic Compounds

“…In the lower binding energy region, between 100 and 110 eV, the peaks corresponding to trivalent Ce are superimposed on the Co 3s peaks, while the peaks at higher binding energies, situated at about 119 and 122.5 eV, correspond to the fraction of tetravalent Ce in the compound. The spin‐orbit splittings for Ce 4+ are around 3.4 ± 0.1 eV in all investigated samples, in good agreement with the values measured in other mixed valence compounds, such as CeNi 2 , CeNi 5 , CeF 4 , Ce 2 Co 15 Mn 3 , CeCo 7 Mn 5 , and CeCo 8 Mn 4 …”

Intermediate Valence Behavior of Yb2Cu9Al8

“…[13][14][15][16] Further examples include systems that show spinglass, non-Fermi-liquid, as well as intermediate valence behaviors. [17][18][19][20][21][22][23] When it comes to ternary compounds with the Th 2 Zn 17 structure type, it is possible to create systems, which exist with a limited solubility range: A 2 T 17-x M x (where A is either an actinide or lanthanide atom; and T and M are transition metals). The atomic distribution of T and M atoms takes place on four sites, which correspond to zinc positions.…”

“…These compounds often display interesting physical properties: U 2 Zn 17 is a heavy‐fermion antiferromagnet, the R 2 Fe 17 ( R = La, Ce, Sm, Gd, Tb, Er or Y) compounds are ferromagnets, the R 2 Co 17 ( R = Pr, Sm, Er, Tm, Yb, or Y) family displays peculiar anisotropic properties . Further examples include systems that show spin‐glass, non‐Fermi‐liquid, as well as intermediate valence behaviors …”

Magnetic Behaviour of the Ce-Co-Mn Intermetallics of MgCu2Structure Type

“…The nearestneighborhood of Co and Mn atoms, as well as, the Co Co, CoMn, and MnMn distances are dierent in each compound. By combining X-ray photoelectron spectroscopy (XPS) and magnetic measurements, we have shown that in Ce 2 Co 15 Mn 3 (with Th 2 Zn 17 structure type) [2] and CeCo 7 Mn 5 and CeCo 8 Mn 4 (with ThMn 12 structure type) [3] compounds both Co and Mn atoms carry magnetic moments and Ce atoms are in the intermediate valence state. The complex magnetic structure of the three compounds is determined by the competition between the ferromagnetic (CoCo pairs) and antiferromagnetic (CoMn and MnMn pairs) interactions.…”