Investigation of ferromagnetic filled skutterudite compound EuFe₄As₁₂

Ferrimagnetism in EuFe4As12 revealed by Eu153 NMR and Ding1, Lee2, Nishine3 et al. 2020Phys. Rev. B0000View full textAdd to dashboardCite

“…3(d), 1/T 1 is proportional to temperature, obeying a Korringa law 1/T 1 T = 28 (sK) −1 expected for a metallic state. This result confirms the metallic ground state in the ferrimagnetic state from a microscopic point of view, consistent with the resistivity measurements [11,12].…”

“…From the behavior of the temperature dependence of ν Q , we consider that the structural phase transition would a second-order type of phase transition if the local distortion at the Eu sites were due to a structural phase transition. Since the specific heat measurements do not show any anomaly other than at T C [12], one may speculate that the magnetic ordering takes place with a pos-sible concomitant structural phase transition, although the estimated T ∼ 125 K is a little bit far from T C = 154 K.…”

“…However, the magnetism of EuFe 4 As 12 can be quite different from the aforementioned Eu(Fe 1−x Co x ) 2 As 2 . EuFe 4 A 12 exhibits a magnetic phase transition at T C ∼ 152 K where both Eu 4f and itinerant Fe moments order at the same time [11,12]. It is pointed out that the transition temperature of T C ∼ 152 K is relatively high in comparison with other related compounds [11].…”

“…It is also interesting to point out that the specific heat measurements [12] suggest that the rattling motion of the Eu atoms is not prominent in EuFe 4 As 12 . This has been generally explained in terms of the ionic radius of Eu 2+ ions greater than those of trivalent rare-earth ions, which gives rise to a less space for the rattling motion of the Eu 2+ ions in the Fe 4 As 12 cage.…”

Electron transport and magnetic properties of the filled skutterudite compound ThFe4As12

“…For completeness, we note that in the series MFe 4 As 12 with M being La, Ce, Pr, Nd, Sm, and Eu [17,18,19], magnetism due to itinerant Fe-3d electrons is only not observed in CeFe 4 As 12 , as mentioned above. In all other These compounds were derived from the binary pnictides TX 3 , the prototype of which is CoAs 3 , a diamagnetic zero gap semiconductor [22].…”