Quantum oscillations with magnetic hysteresis observed in CeTe$_{3}$ thin films

TL;DR

This study reports the observation of quantum oscillations with magnetic hysteresis in CeTe₃ thin films, revealing complex magnetic and electronic behaviors at very low temperatures through magnetotransport measurements.

Contribution

It presents the first observation of magnetic hysteresis in quantum oscillations in CeTe₃ thin films, highlighting the interplay between magnetic transitions and Fermi surface modulation.

Findings

Observation of Shubnikov-de-Haas oscillations at 4 K

Detection of magnetic hysteresis in quantum oscillations below 3 K

Identification of a unique magnetoresistance spike at 0.6 T

Abstract

We have performed magnetotransport measurements in CeTe$_{3}$ thin films down to $0.2~{\rm K}$. It is known that CeTe$_{3}$ has two magnetic transitions at $T_{\rm N1} \approx 3~{\rm K}$ and $T_{\rm N2} \approx 1~{\rm K}$. A clear Shubnikov-de-Haas (SdH) oscillation was observed at $4~{\rm K}$, demonstrating the strong two-dimensional nature in this material. Below $T_{\rm N2}$, the SdH oscillation has two frequencies, indicating that the Fermi surface could be slightly modulated due to the second magnetic transition. We also observed a magnetic hysteresis in the SdH oscillation below $T_{\rm N1}$. Especially, there is a unique spike in the magnetoresistance at $B \approx 0.6~{\rm T}$ only when the magnetic field is swept from a high enough field (more than $2~{\rm T}$) to zero field.