Optical reflectivity study on Al-substituted La0.825Sr0.175MnO3: Unconventional localization state induced by vacancies in the ferromagnetic Kondo lattice

Authors
Takenaka, K Sawaki, Y Sugai, S
Citation
K. Takenaka et al., Optical reflectivity study on Al-substituted La0.825Sr0.175MnO3: Unconventional localization state induced by vacancies in the ferromagnetic Kondo lattice, J PHYS JPN, 70(7), 2001, pp. 1896-1899
Citations number
18
Categorie Soggetti
Physics
Journal title
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
ISSN journal
00319015 → ACNP
Volume
70
Issue
7
Year of publication
2001
Pages
1896 - 1899
Database
ISI
SICI code
0031-9015(200107)70:7<1896:ORSOAL>2.0.ZU;2-Y
Abstract
Al-substituted La0.825Sr0.175MnO3 shows a resistance minimum at low tempera ture. However, this cannot be explained within a simple localization pictur e because the optical conductivity is characterized not only by a non-Drude infrared peak but also by an additional absorption at about 3 eV. A small amount (similar to3%) of vacancy (Al impurity) in the ferromagnetic Kondo l attice changes the overall character of the charge dynamics and induces the unconventional localization state.