Crystal Growth and basic transport and magnetic properties of MnBi2Te4

Bibliographic Details
Title: Crystal Growth and basic transport and magnetic properties of MnBi2Te4
Authors: Rani, Poonam, Saxena, Ankush, Sultana, Rabia, Nagpal, Vipin, Islam, S. S., Patnaik, S., Awana, V. P. S.
Publisher Information: arXiv, 2019.
Publication Year: 2019
Subject Terms: Condensed Matter - Materials Science, Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences
Description: We report successful growth of magnetic topological insulator (MTI) MnBi2Te4. The heating schedule basically deals with growth of the crystal from melt at 900C and very slow cooling (1C/hr) to around 600C with 24 hours hold time, followed by cooling to room temperature. Our detailed, PXRD Reitveld analysis showed that the resultant crystal is dominated mainly by MnBi2Te4 and minor phases of Bi2Te3 and MnTe. The transport measurements showed a step like behavior at around 150K followed by cusp like structure in resistivity at around 25K (TP) due reported anti-ferromagnetic ordering of Mn. Both the resistivity transitions are seen clearly in dR/dT measurements at 150K and 20K respectively. The 25K transition of the compound is also seen in magnetic susceptibility. Low temperature (5K) magnetoresistance (MR) in applied field of up to 6 Tesla exhibited negative ve MR below 3 Tesla and +ve for higher fields. Also, seen are steps in MR below one Tesla. The studied MnBi2Te4 MTI crystal could be a possible candidate for Quantum Anomalous Hall (QAH) effect.
Comment: 14 Pages Text + Figs. Accepted Letter - J. Sup. & Novel Mag
DOI: 10.48550/arxiv.1906.09038
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Rights: OPEN
Accession Number: edsair.doi.dedup.....01ddaf2eef6704436e4bc415eda8286c
Database: OpenAIRE