Open AccessLOW-TEMPERATURE RESISTANCE MINIMUM AND ITS ORIGIN IN La2/3Ca1/3Mn1-xCuxO3(x=0.15) SYSTEM
Author(s) -
Guang Li,
Peisong Tang,
Sun Xia,
Yong Jiang,
Yue Chen,
Sheng Wang,
Huang Zhen,
Yuan Song-Liu
Publication year - 1999
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.48.505
Subject(s) - condensed matter physics , curie temperature , materials science , doping , kondo effect , field (mathematics) , physics , ferromagnetism , electrical resistivity and conductivity , quantum mechanics , mathematics , pure mathematics
The temperature dependence of resistance in the La2/3Ca1/3Mn1-xCuxO3(x=0 and 0.15) system at temperatures much lower than Curie temperature has been experimentally studied. It is found that a resistance minimum obviously appears in the zero-field R-T curve of the Cu-doped sample. Such a resistance minimum disappears when a magnetic field is applied to the sample. Based on Kondo theory, a quantitative comparison between the theory and the experimental data has been presented. It is shown that the experimental observation can be well understood within the framework of Kondo theory.