Open AccessSTUDY ON THE RESISTIVITY AND HALL EFFECT OF MgB2 AND Mg0.93Li0.07B2
Author(s) -
Huiling Li,
Keqing Ruan,
Shiyan Li,
Mo Wei-Qin,
Rong Fan,
Luo Xigang,
Xianhui Chen,
Lei Cao
Publication year - 2001
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.50.2044
Subject(s) - hall effect , condensed matter physics , electrical resistivity and conductivity , materials science , doping , temperature coefficient , transition temperature , charge carrier , superconductivity , physics , composite material , quantum mechanics
The temperature dependences of resistivity and Hall coefficient of MgB2 and Mg0.93Li0.07B2 were measured, and the temperature dependence of cot-ΘH was calculated. The result of resistivity indicates that MgB2 and Mg0.93Li0.07B2 nearly have the same transition temperature. The-possible effect on transition temperature has been discussed. The measurement of Hall coefficient suggests the type of charge carriers is hole, and the Hall coefficient of Mg0.93Li0.07B2 becomes a little smaller compared with that of MgB2 which is attributed to Li doping . Both the decrease with increasing temperature-and-the temperature dependence of cotangent of Hall angle are proportional to the square of temperature.