Skip to main content Accessibility help

Molecular Magnet Induced Transformative Effects in Molecular Spintronics Devices: A Monte Carlo Study

  • Christopher D’Angelo (a1) and Pawan Tyagi (a2)


Molecular spintronics devices (MSDs) are capable of harnessing the controllable transport and magnetic properties of molecular device elements and are highly promising candidates for revolutionizing computer logic and memory. A MSD is typically produced by placing magnetic molecule(s) between the two ferromagnetic electrodes. Recent experimental studies show that the molecules produced unprecedented strong exchange couplings between the two ferromagnets, leading to intriguing magnetic and transport properties in a MSD. Future development of MSDs will critically depend on obtaining an in-depth understanding of the molecule induced exchange coupling and its impact on MSD’s switchability and temperature stability. However, the large size of MSD systems and unsuitable device designs are the two biggest hurdles in theoretical and experimental studies of magnetic attributes produced by molecules in a MSD. This research theoretically studies the MSD by performing Monte Carlo Simulation (MCS) studies, which have the capacity to tackle large systems- such as MSD based on magnetic tunnel junction (MTJ) test bed. The MTJ based MSD has the distinctive advantage that MTJ test bed can be subjected to experimental magnetic characterizations before and after transforming it into a MSD by bridging the molecules of interest between the two metal electrodes of a MTJ. Hence the result of our MCS can be verified experimentally.



Hide All
[1] Coronado, E. and Epsetin, A. J., “Molecular spintronics and quantum computing,” J. Mater. Chem., vol. 19, pp. 16701671, 2009.
[2] Bogani, L. and Wernsdorfer, W., “Molecular spintronics using single-molecule magnets,” Nat. Mater., vol. 7, pp. 179186, Mar 2008.10.1038/nmat2133
[3] Pasupathy, A. N., Bialczak, R. C., Martinek, J., Grose, J. E., Donev, L. A. K., McEuen, P. L., et al. ., “The Kondo effect in the presence of ferromagnetism,” Science, vol. 306, pp. 8689, Oct 1 2004.10.1126/science.1102068
[4] Heersche, H. B., de Groot, Z., Folk, J. A., van der Zant, H. S. J., Romeike, C., Wegewijs, M. R., et al. ., “Electron transport through single Mn-12 molecular magnets,” Phys. Rev. Lett., vol. 96, p. 206801, May 26 2006.10.1103/PhysRevLett.96.206801
[5] Liang, W. J., Shores, M. P., Bockrath, M., Long, J. R., and Park, H., “Kondo resonance in a single-molecule transistor,” Nature, vol. 417, pp. 725729, Jun 13 2002.10.1038/nature00790
[6] Jurow, M., Schuckman, A. E., Batteas, J. D., and Drain, C. M., “Porphyrins as molecular electronic components of functional devices,” Coord. Chem. Rev., vol. 254, pp. 22972310, Oct 2010.10.1016/j.ccr.2010.05.014
[7] Li, D. F., Parkin, S., Wang, G. B., Yee, G. T., Clerac, R., Wernsdorfer, W., et al. ., “An S=6 cyanide-bridged octanuclear (Fe4Ni4II)-Ni-III complex that exhibits slow relaxation of the magnetization,” J. Am. Chem. Soc., vol. 128, pp. 42144215, Apr 5 2006.10.1021/ja058626i
[8] Tyagi, P., “Molecular Spin Devices: Current Understanding and New Territories,” Nano, vol. 4, pp. 325338 2009.10.1142/S1793292009001903
[9] Tyagi, P., “Multilayer edge molecular electronics devices,” J. Mater. Chem., vol. 21, pp. 47334742, 2011.10.1039/c0jm03291c
[10] Chylarecka, D., Kim, T. K., Tarafder, K., Muller, K., Godel, K., Czekaj, I., et al. ., “Indirect Magnetic Coupling of Manganese Porphyrin to a Ferromagnetic Cobalt Substrate,” J. Phys. Chem. C, vol. 115, pp. 12951301, Feb 2011.10.1021/jp106822s
[11] Newman, M. E. and Barkema, G. T., Monte Carlo Methods in Statistical Physics. Oxford: Clarendon Press, 1999.
[12] Tyagi, P., “Molecule induced strong exchange coupling between ferromagnetic electrodes of a magnetic tunnel junction,” arXiv:1110.0885v1 [cond-mat.mtrl-sci], p., 2011.



Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed