An origin of good electrical conduction in La4BaCu5O13+δ

Loading...
Thumbnail Image
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal
View/Open full text file from the Research portal
Date
2015
Major/Subject
Mcode
Degree programme
Language
en
Pages
1-6
Series
JOURNAL OF APPLIED PHYSICS, Volume 118, issue 3
Abstract
We have prepared a set of polycrystalline samples of the metallic copper oxide La4BaCu5−xCoxO13+δ (0 ≤ x ≤ 0.35) and have measured the resistivity from 4 to 800 K. All the resistivities show metallic temperature dependence with a small magnitude less than 2 mΩ cm at 800 K, indicating that the metallic conduction is robust against impurities. The robust metallic conduction further suggests that this class of oxide is a promising candidate for electrical leads at high temperature, which might replace platinum. A detailed measurement and analysis on the Hall resistivity have revealed that at least two components are responsible for the electrical conduction, in which a large number of electrons of moderate mobility coexist with a much smaller number of holes of extremely high mobility. This large electron density well screens the impurity potential and retains the metallic conduction against 7% impurity doping.
Description
Keywords
Other note
Citation
Mori , D , Asai , S , Terasaki , I , Okazaki , R , Yasui , Y , Parkkima , O & Karppinen , M 2015 , ' An origin of good electrical conduction in La4BaCu5O13+δ ' , Journal of Applied Physics , vol. 118 , no. 3 , 035104 , pp. 1-6 . https://doi.org/10.1063/1.4926482