Abstract
Based on Monte Carlo simulations, the effect of structural configuration on the hysteresis behavior and tunneling magnetoresistance (TMR) of composite nanoparticles with ferromagnetic (FM) core/anti-ferromagnetic (AFM) shell is investigated. The simulated results indicate that the coercive field (H c) of composites increases with the decreasing ratio of core-radius (r core) to shell-radius (r shell). When the ratio of r shell to r core is approaching 4:3, H c decreases with increasing AFM thickness. In addition, TMR is found to increase with the decreasing ratio of r core to r shell, resulting from the enhancement of resistance changes in disordered AFM shell.
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Yang, Y., Huang, Z. Theoretical investigation on tunneling magnetoresistance in ferromagnetic/anti-ferromagnetic core/shell system. Sci. China Phys. Mech. Astron. 55, 2038–2041 (2012). https://doi.org/10.1007/s11433-012-4850-2
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DOI: https://doi.org/10.1007/s11433-012-4850-2