  Here we report successful single crystal growth of new possible magnetic
topological insulator (MTI) FeBi2Te4 by self-flux method via vacuum
encapsulation process. The detailed Rietveld analysis of Powder XRD data shows
the as grown MTI crystal to be mainly dominated by FeBi2Te4 phase along with
minority phases of Bi2Te3 and FeTe. Scanning electron microscope (SEM) image
shows the morphology of as grown MTI single crystal to be of layered type
laminar structure. Raman spectroscopy of the crystal exhibited three distinct
phonon modes at 65, 110, and 132 cm-1 along with two split secondary modes at
90, and 144cm-1. The secondary split modes are result of FeTe intercalation in
Bi2Te3 unit cell. Magneto-resistance measurement has been performed at
different temperatures i.e. 200K, 20K and 2K in applied magnetic fields up to
12 Tesla, which showed very low MR in comparison to pure Bi2Te3 crystal.
Temperature dependence of DC magnetization measurements show the FeBi2Te4
crystal to be mainly of ferromagnetic (FM) or ferri-magnetic nature above 295
K, albeit a secondary weak magnetic transition is seen at 54-46K as well.
Detailed isothermal magnetization (MH) results showed that FM saturation moment
at 295K is 0.00213emu/g, which is nearly invariant till 400 K. Summary, we had
grown an MTI FeBi2Te4 single crystal, which may be a possible entrant for
Quantum Anomalous Hall (QAH) effect at room temperature or above.
