Magnetic phases in superconducting, polycrystalline bulk FeSe samples - Université de Lorraine Accéder directement au contenu
Article Dans Une Revue AIP Advances Année : 2021

Magnetic phases in superconducting, polycrystalline bulk FeSe samples

Résumé

The FeSe compound is the simplest high-temperature superconductor (HTSc) possible, and relatively cheap, not containing any rare-earth material. Although the transition temperature, Tc, is just below 10 K, the upper critical fields are comparable with other HTSc. Preparing FeSe using solid-state sintering yields samples exhibiting strong ferromagnetic hysteresis loops (MHLs), and the superconducting contribution is only visible after subtracting MHLs from above Tc. Due to the complicated phase diagram, the samples are a mixture of several phases, the superconducting beta-FeSe, and the non-superconducting delta-FeSe and gamma-FeSe. Furthermore, antiferromagnetic Fe7Se8 and ferromagnetic alpha-Fe may be contained, depending directly on the Se loss during the sintering process. Here, we show MHLs measured up to ±7 T and determine the magnetic characteristics, together with the amount of superconductivity determined from M(T ) measurements. We also performed a thorough analysis of the microstructures in order to establish a relation between microstructure and the resulting sample properties.
Fichier principal
Vignette du fichier
FeSe_Nouailhetas.pdf (3.2 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03107789 , version 1 (12-01-2021)
hal-03107789 , version 2 (15-01-2021)

Identifiants

Citer

Quentin Nouailhetas, Anjela Koblischka-Veneva, Michael Rudolf Koblischka, S. Pavan Kumar Naik, Florian Schäfer, et al.. Magnetic phases in superconducting, polycrystalline bulk FeSe samples. AIP Advances, 2021, 11 (1), pp.015230. ⟨10.1063/9.0000167⟩. ⟨hal-03107789v1⟩
66 Consultations
131 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More