期刊
EUROPEAN PHYSICAL JOURNAL B
卷 14, 期 3, 页码 509-513出版社
SPRINGER VERLAG
DOI: 10.1007/s100510051059
关键词
-
We measured the temperature dependence of the linear high field Hall resistivity rho(H) of La0.67Ca0.33MnO3 (T-C = 232 K) and La0.67Sr0.33MnO3 (T-C = 345 K) thin films in the temperature range from 4 K up to 360 K in magnetic fields up to 20 T. At low temperatures we find a charge-carrier density of 1.3 and 1.4 holes per unit cell for the Ca- and Sr-doped compound, respectively. In this temperature range electron-magnon scattering contributes to the longitudinal resistivity. At the ferromagnetic transition temperature T-C a dramatic drop in the number of charge-carriers n down to 0.6 holes per unit cell, accompanied by an increase in unit cell volume, is observed. Corrections of the Hall data due to a non saturated magnetic state will lead a more pronounced charge-carrier density collapse.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据