  Rare-earth tritellurides are van-der-Waals antiferromagnets which have been
attracting attention as materials not only with high mobility, but also with
various states such as superconductivity under high pressure, incommensurate
charge-density-wave (CDW) phase, and multiple antiferromagnetic phases. In this
work, we performed longitudinal resistivity and Hall resistivity measurements
simultaneously in exfoliated $R$Te$_{3}$ ($R$ =La, Ce, Tb) thin film devices,
in order to investigate the influence of magnetic ordering on transport
properties in van-der-Waals magnetic materials. We have obtained carrier
mobility and concentration using a two-band model, and have observed an
increase in carrier mobility in the antiferromagnets CeTe$_{3}$ and TbTe$_{3}$
due to the magnetic transition. Especially in CeTe$_{3}$, the carrier
concentration has changed drastically below the magnetic transition
temperature, suggesting the interaction between the CDW and antiferromagnetic
phases. In addition, the analysis of the Shubnikov-de Haas oscillations in
CeTe$_{3}$ supports the possibility of Fermi surface modulation by magnetic
ordering. This research will pave the way not only for spintronic devices that
take advantage of high mobility, but also for the study of the correlation
between CDW and magnetism states in low-dimensional materials.
