Non-percolating small metallic clusters and sharp suppression of metallicity in RE0.55Sr0.45Mn1-xRuxO3 manganites.
Phys Chem Chem Phys
; 20(4): 2431-2437, 2018 Jan 24.
Article
de En
| MEDLINE
| ID: mdl-29308795
ABSTRACT
The origin of the anomalous sharp phase transition from a ferromagnetic metal into a ferromagnetic insulator has been investigated in ruthenium (Ru)-doped RE0.55Sr0.45Mn1-xRuxO3 (0 ≤ x ≤ 0.25) manganites (RESRMO) with RE(A-site) = Sm, Eu and Gd. The transition is independent of RE and occurs at a Ru doping level x of around 0.16-0.18. The analysis of the temperature derivative of the resistivity and the magneto-resistance at high temperatures as a function of x suggests that the suppression of metallicity originates from the doping driven magnetic/spin disorder that coexist within the ferromagnetic metallic/insulating matrix in these compounds.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Langue:
En
Journal:
Phys Chem Chem Phys
Sujet du journal:
BIOFISICA
/
QUIMICA
Année:
2018
Type de document:
Article
Pays d'affiliation:
Canada