On the Paramagnetic-Like Susceptibility Peaks at Zero Magnetic Field in [Formula: see text] Single Crystals

Shiu-Ming Huang; Pin-Cing Wang; Kuo-Yi Hung; Fu-En Cheng; Chang-Yu Li; Mitch Chou

doi:10.1186/s11671-022-03743-y

On the Paramagnetic-Like Susceptibility Peaks at Zero Magnetic Field in [Formula: see text] Single Crystals

Nanoscale Res Lett. 2022 Nov 10;17(1):107. doi: 10.1186/s11671-022-03743-y.

Authors

Shiu-Ming Huang^{1

2}, Pin-Cing Wang¹, Kuo-Yi Hung¹, Fu-En Cheng¹, Chang-Yu Li³, Mitch Chou^{3

2}

Affiliations

¹ Department of Physics, National Sun Yat-Sen University, 80424 Kaohsiung, Taiwan.
² Center of Crystal Research, National Sun Yat-Sen University, 80424 Kaohsiung, Taiwan.
³ Department of Materials and Optoelectronic Science, National Sun Yat-Sen University, 80424 Kaohsiung, Taiwan.

Abstract

A weakly temperature-dependent paramagnetic-like susceptibility peak at zero magnetic field is observed in [Formula: see text] with only marginal amount of ferromagnetic impurities. The ferromagnetic hysteresis loop and the magnetic moment splitting between zero-field-cooled and field-cooled processes indicate ferromagnetism in the samples. The paramagnetic-like susceptibility peak height is proportional to the remanent magnetic moment of hysteresis loops. High-resolution transmission electron microscope image supports that the observed ferromagnetic feature originates from lattice distortion. These results imply that the weakly temperature-dependent paramagnetic-like susceptibility peak originates from weak lattice distortion and/or superparamagnetism.

Keywords: Dirac point; Lattice distortion; Paramagnetic susceptibility peak; Topological material.