Abstract
Recently, study on magnetoelectric (ME) materials have attracted much attention due to their applicability in low power dissipation electronic devices. Most of the single-phase ME materials are antiferromagnet (AFM) having zero net magnetic moment and hence difficult to detect their spin states. Herein, efforts have been made to introduce magnetism in ME-AFM Cr2O3 by mechanically milling it with a ferromagnetic (FM) α-Fe. Formation of pure phase nanocomposites is evidenced from the microstructural and hyperfine investigations. Phenomena like decrement in crystallite size and unit cell parameters (a &c) with the evolution of lattice strain are also observed with the increase in milling duration. Sample synthesized with highest milling duration shows the signature of exchange bias (Hex) along with enhancement of coercivity (Hc) at low temperature. Most importantly, the presence of thermo-remanent-magnetization above the room temperature and high blocking temperature (TB) make the material suitable for fabrication of ME based memory devices.
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