Abstract
We identify a new two-dimensional (2D) tetragonal phase of transition metal alloyed boron-carbide (t-CrFeBC) sheet through combined first-principles calculations and Monte Carlo (MC) simulations. The t-CrFeBC sheet prefers a ferromagnetic ground state with the metallic electronic property. Also, the t-CrFeBC sheet is dynamically and thermally stable. t-CrFeBC exhibits sizable magnetic anisotropy energy (MAE) of 120 μeV per CrFe alloy with an in-plane easy axis (EA) magnetization direction. Moreover, hysteresis loops and other hysteresis related properties (coercivity and remanent magnetization) which are evidence of existence of ferromagnetism in the t-CrFeBC sheet are presented for a wide range of temperature. MC simulation results indicate that t-CrFeBC sheet is soft magnetic material with a small coercieve field and narrow rectangular shaped hysteresis curve near the room temperature. All results show that 2D t-CrFeBC sheet holds a unique promise for advanced magnetic device applications.
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