Structure and magnetism of electrospun porous high-entropy (Cr<sub>1/5</sub>Mn<sub>1/5</sub>Fe<sub>1/5</sub>Co<sub>1/5</sub>Ni<sub>1/5</sub>)<sub>3</sub>O<sub>4</sub>, (Cr<sub>1/5</sub>Mn<sub>1/5</sub>Fe<sub>1/5</sub>Co<sub>1/5</sub>Zn<sub>1/5</sub>)<sub>3</sub>O<sub>4</sub> and (Cr<sub>1/5</sub>Mn<sub>1/5</sub>Fe<sub>1/5</sub>Ni<sub>1/5</sub>Zn<sub>1/5</sub>)<sub>3</sub>O<sub>4</sub> spinel oxide nanofibers
Alessandro Ponti, Claudia Triolo, Beatrix Petrovičová, Anna Maria Ferretti, Gioele Pagot, Wenlei Xu, Vito Di Noto, Nicola Pinna, S. Santangelo
Abstract
tetrahedral sites and is random only within the octahedral and tetrahedral sublattices. The nanofibers are ferrimagnets with relatively low critical temperature more similar to cubic chromites and manganites than to ferrites. Replacing the magnetic cations Co or Ni with non-magnetic Zn lowers the critical temperature from 374 K (Cr,Mn,Fe,Co,Ni) to 233 and 105 K for (Cr,Mn,Fe,Ni,Zn) and (Cr,Mn,Fe,Co,Zn), respectively. The latter nanofibers additionally have a low temperature transition to a reentrant spin-glass-like state.
Topics & Concepts
Materials scienceOctahedronSpinelNon-blocking I/OX-ray photoelectron spectroscopyNanofiberChromiumCalcinationCrystallographyInorganic chemistryChemical engineeringNanotechnologyMetallurgyCrystal structureChemistryCatalysisEngineeringBiochemistryHigh Entropy Alloys StudiesHigh-Temperature Coating BehaviorsAdvanced materials and composites