Lattice parameters, magnetic susceptibility and thermal conductivity of ScFe4Al8 and YFe4Al8

Possible coexistence of antiferromagnetism, spin–glass, and superconductivity in ScFe 4 Al 8 , and YFe 4 Al 8 single crystals

“…The susceptibility of the sample cooled in a zero magnetic field (ZFC) and measured in a magnetic field of 50 Oe is taken from Ref. [2]. χ ZFC (T) shows two maxima at 120 K (T N ) and more pronounced peak at 60 K, whereas the FC plots have different character.…”

“…[2]. X-ray investigations were carried out at T = 15(1) and 13(1) K for the Sc and Y compounds, respectively, and at 293 K for both samples.…”

“…X-ray investigations were carried out at T = 15(1) and 13(1) K for the Sc and Y compounds, respectively, and at 293 K for both samples. The results are presented in [2]. The magnetic susceptibility of the ternary compounds was examined in the temperature range 1.9-300 K, in a magnetic field of 50 Oe for zero field cooled (ZFC) samples, in a magnetic field of 100 Oe and 200 Oe for field cooled (FC) in 50 Oe and 100 Oe, respectively, for the Sc sample (Fig.…”

“…For the other hand, the compounds of nonmagnetic rare earths exhibiting, in principle, antiferromagnetic character, show complex magnetic properties at low temperature (see e.g. [2]). …”

“…For the yttrium compound the existence of superconductivity was also proved by the Andreevreflection in the point contact measurements [6]. The results of examination of the heat transport and preliminary magnetic measurements have been presented in [2]. The contradictory information inclined us to check low field magnetic susceptibility in zero field (ZFC) and field cooled (FC) mode, and superconductivity on unoriented single crystal of these materials.…”