Growth, structure, micro-structure and magneto transport of an easy route synthesized bulk polycrystalline TiSe2

TL;DR

This study presents an easy synthesis method for bulk polycrystalline TiSe2, analyzing its structure, microstructure, vibrational modes, and magneto-transport properties, including charge density wave behavior and magnetoresistance effects.

Contribution

It introduces a simple synthesis route for TiSe2 and provides comprehensive structural and transport property analysis, including CDW and magnetoresistance characteristics.

Findings

Phase purity confirmed by PXRD.

Charge density wave observed at 180K with hysteresis.

Negative magnetoresistance below CDW, positive above.

Abstract

This article reports an easy route synthesis of bulk polycrystalline TiSe2. Phase purity and microstructure are determined through powder X-ray diffraction (PXRD) and field emission scanning electron microscopy (FESEM) respectively. Vibrational modes of TiSe2 as being analyzed by Raman spectroscopy, show the occurrence of both Ag and Eg modes. Charge density wave (CDW) is observed in transport measurements of TiSe2 with hysteresis in cooling and warming measurements at around 180K. Further, studied TiSe2 showed negative magnetoresistance (MR) below the CDW and a small positive MR above the CDW.