Magnetic ordering and dense Kondo behavior inEuFe2P2

Abstract

Ternary iron phosphide EuFe2P2 with ThCr2Si2-type structure has been systematically studied by the measurements of crystal structure, magnetization, Mössbauer effect, transport properties and specific heat. The structural refinement result confirms no direct P-P covalent bonding. The Mössbauer spectra indicate no magnetic moment for the Fe atoms and, that the Eu ions are divalent in the whole temperatures. The Eu 2+ spins order ferromagnetically at TC =29 K, followed by a possible helimagnetic ordering below THM =26 K, where the Eu 2+ moments tilt a little from the c-axis. External magnetic field increases the TC gradually, but suppresses the THM rapidly. (Magneto)resistivity data indicate characteristic dense Kondo behavior above the Curie temperature. The result is discussed in terms of the interplay between intersite RKKY and intrasite Kondo interactions.

Coexistence of superconductivity and ferromagnetism in P-dopedEuFe2As2

“…The proposed canted antiferromagnetic order or spiral order could not might be very close to -1. The observed ferromagnetic contribution for the non-superconducting ferromagnet EuFe2P2 [36] (in ZFC data) is the same order of magnitude as the χobserved in the present case.…”

Superconductivity and ferromagnetism in EuFe2(As1−xPx)2

“…When x >0.45, no sign of SC was detected, and the resistivity kinks reappear at T Eu M . As can be seen, T Eu M climbs with further P substitution, and arrives at 29 K for the end member EuFe 2 P 2 [31,32]. Figure 3 shows the temperature dependence of magnetic susceptibility of two representative samples.…”

Evolution of Eu2+spin dynamics in Ba1−xEuxRosa1, Adriano2, Iwamoto3 et al. 2012Phys. Rev. B151151View full textAdd to dashboardCite

“…Interestingly, the claim for the presence of Kondo single impurity effect interaction for the Eu 2+ ions in the 122 system has also been made in the case of EuFe 2 P 2 . 34 …”