Tunneling conductivity of manganites with negative magnetoresistance

Authors
Medvedev, YV Tarenkov, VY Svistunov, VM Abaloshev, AV Abalosheva, IS Lewandowski, SJ
Citation
Yv. Medvedev et al., Tunneling conductivity of manganites with negative magnetoresistance, ACT PHY P A, 97(5), 2000, pp. 827-830
Citations number
11
Categorie Soggetti
Physics
Journal title
ACTA PHYSICA POLONICA A
ISSN journal
05874246 → ACNP
Volume
97
Issue
5
Year of publication
2000
Pages
827 - 830
Database
ISI
SICI code
0587-4246(200005)97:5<827:TCOMWN>2.0.ZU;2-Q
Abstract
Tunneling investigations of ferromagnetic La0.6Sr0.4MnO3 ceramic samples sh owing negative magnetoresistance effect were carried out in two types of ju nctions: symmetric "break junctions" and asymmetric ceramics-insulator-meta l junctions. The results are consistent with the presence of small ferromag netic clusters in the insulating barriers of both types of junctions and su ggest a two-phase state realized by impurity mechanism of phase separation.