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Charge Ordered State in the Impurity-Doped Manganites

Authors :
R. Shoji
Yutaka Moritomo
Naoki Yamamoto
Shigeo Mori
Takuro Katsufuji
Akihiko Machida
Source :
Journal of the Physical Society of Japan. 71:1280-1283
Publication Year :
2002
Publisher :
Physical Society of Japan, 2002.

Abstract

Impurity effect on the charge and orbital ordered (CO/OO) state in doped manganites has been studied by the transmission electron microscopy (TEM), in addition to the electric and magnetic measurements. In the Cr-doped manganites (Nd 0.5 Ca 0.5 Mn 1- y Cr y O 3 ), the CO/OO state characterized by the incommensurate wave vector is still realized as the microdomains with the size of 10–30 nm even at lower temperature of 20 K. On the other hand, the Sc-doped manganites (Nd 0.5 Ca 0.5 Mn 1- y Sc y O 3 ) clearly show an incommensurate to commensurate structural phase transition accompanying the formation of the long-ranged CO/OO state around 60 K. From our experimental findings, it is suggested that the substituted Cr 3+ and Sc 3+ ions serve as the spin impurity and hole vacancy, respectively.

Details

ISSN :
13474073 and 00319015
Volume :
71
Database :
OpenAIRE
Journal :
Journal of the Physical Society of Japan
Accession number :
edsair.doi...........91786f4d44fa3332da8438cd67c4a019
Full Text :
https://doi.org/10.1143/jpsj.71.1280