Influence of oxygen vacancies on transport properties of La2/3Ca1/3MnO3-y films grown on SrTiO3 substrates

被引：4
|
作者：
Liu, Shiu-Jen [1 ]
Chen, Shyh-Fen
Juang, Jenh-Yih
Lin, Jiunn-Yun
Wu, Kaung-Hsiung
Uen, Tseng-Ming
Gou, Yi-Shun
机构：
[1] Mingchi Univ & Technol, Dept Mat Engn, Taipei 243, Taiwan
[2] Natl Tsing Hua Univ, Dept Electrophys, Hsinchu 300, Taiwan
[3] Litholink Technol Corp, Hsinchu 302, Taiwan
[4] Natl Taiwan Normal Univ, Dept Phys, Taipei 106, Taiwan
[5] Natl Chiao Tung Univ, Inst Phys, Hsinchu 300, Taiwan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2007年 / 46卷 / 10A期
关键词：
colossal magnetoresistance; manganites; insulator-metal transition; pulsed-laser deposition; small polaron; variable range hopping;
D O I：
10.1143/JJAP.46.6621
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We prepared La2/3Ca1/3MnO3-y films with various oxygen contents on SrTiO3 substrates and measured the temperature-dependent resistivity of the manganite films under tensile stress due to the lattice mismatch between manganites and single-crystal substrates. The effect of oxygen vacancies on the transport properties of the films was investigated. The experimental results reveal that the dependence of temperature on the resistivity of fully oxygenated films can be attributed to the adiabatic small-polaron conduction and unconventional one-magnon scattering at temperatures above and far below the insulator-metal (I-M) transition temperature, respectively. However, for highly oxygen -deficient films, the temperature-dependent resistivity can be ascribed to Mott's variable-range-hopping and small polaron metallic conduction at temperatures above and far below the I-M transition temperature, respectively.
引用
收藏
页码：6621 / 6625
页数：5
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