Effect of Mn Substitution on Superconductivity in PrFeAs(O,F): Role of Magnetic Impurities
arXiv:2604.21684 · doi:10.1016/j.jpcs.2026.113933
Abstract
We investigate Mn substitution at the Fe site in PrFe1-xMnxAsO0.7F0.3 (0 to 0.1) using structural, Raman, density functional theory (DFT), transport, and magnetic measurements. X-ray diffraction and Raman analyses confirm preferential Mn incorporation into the FeAs planes, accompanied by lattice expansion and suppression of Fe-related vibrational modes. Electrical transport reveals a systematic decrease of the superconducting transition temperature from 48 K (x = 0) to complete suppression at x = 0.1, together with low-temperature resistivity upturns evolving toward insulating-like behavior. Magnetization and magnetotransport measurements show degradation of superconducting coherence, critical current density, upper critical field, and vortex activation energy with increasing Mn content. The results demonstrate that Mn acts as an efficient magnetic impurity, strongly perturbing the electronic and magnetic environment of the FeAs layers. Comparative analysis indicates relatively enhanced robustness of superconductivity in the Pr-based system, highlighting the role of rare-earth-dependent electronic correlations in impurity effects.
arXiv comment30 pages, 7 figures
References in corpus (29)
- Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
- The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
- Superconductivity in Iron Compounds
- High-temperature superconductivity in iron-based materials
- Gap symmetry and structure of Fe-based superconductors
- Antiferromagnetic order and spin dynamics in iron-based superconductors
- Strong Correlations and Magnetic Frustration in the High Tc Iron Pnictides
- Iron-Based Superconductors: current status of materials and pairing mechanism
- Studies of Impurity-Doping Effects and NMR Measurement5s of La1111 and/or Nd 1111 Fe-Pnictide Superconductors
- Lattice and Magnetic structures of PrFeAsO, PrFeAsO0.85F0.15 and PrFeAsO0.85
- Anisotropic in-plane resistivity in the nematic phase of the iron pnictides
- Do Transition Metal Substitutions Dope Carriers in Iron Based Superconductors?
- Physical and magnetic properties of Ba(FeRu)As single crystals
- Antiferromagnetic ordering in the absence of a structural distortion in Ba(Fe{1-x}Mn{x})2As2
- Contrasting Pair-Breaking Effects by Doping Mn and Zn in Ba0.5K0.5Fe2As2
- Isoelectronic Ru substitution at Fe-site in Sm(Fe1-xRux)As(O0.85F0.15) compound and its effects on structural, superconducting and normal state properties
- Mn local moments prevent superconductivity in iron-pnictides Ba(Fe 1-x Mn x)2As2
- Unconventional disorder effects in correlated superconductors
- Enhancing magnetic stripe order in iron pnictides by RKKY exchange interactions
- The poisoning effect of Mn in LaFe(1-x)Mn(x)AsO(0.89)F(0.11): unveiling a quantum critical point in the phase diagram of iron-based superconductors
- Absence of Superconductivity in the "hole-doped" Fe pnictide Ba(FeMn)As: Photoemission and X-ray Absorption Spectroscopy Studies
- Charge doping versus disorder in CeFeAsO: do the in- and out-of-plane dilutions play the same role?
- Effects of isoelectronic Ru substitution at the Fe site on the energy gaps of optimally F-doped SmFeAsO
- Progress in nonmagnetic impurity doping studies on Fe-based superconductors
- Short range magnetic order and effective suppression of superconductivity by manganese-doping in LaFe1-xMnxAsO1-yFy
- Fast recovery of the stripe magnetic order by Mn/Fe substitution in F-doped LaFeAsO superconductors
- Copper doping effects on the superconducting properties of Sm-based oxypnictides
- Role of magnetic dopants in the phase diagram of Sm1111 pnictides: The Mn case
- Praseodymium doping effect on the superconducting properties of FeSeTe bulks under ambient and high-pressure growth conditions