Abstract
A computer code has been developed that simulates the performance of organic spin sandwiches. Chemical vapor deposition of polymer is simulated by placing monomers in random positions and allowing them to follow a random walk until joining some given linear polymer chain. Spontaneous magnetization in the intermediate region of the sandwich is simulated via Ising model. A genetic algorithm randomly flips a spin whenever the Hamiltonian of the system is optimized in energy space. Magnetization plateau turns out to be maximal when the border spins are parallel and is minimal when border spins are antiparallel. Simulation results are in agreement with recent experimental results for pyrochlore oxide superconductor
Keywords
- -Genetic Algorithms
- Computer Modelling
- Organic Spin Sandwiches
- Simulation.
This is a preview of subscription content, access via your institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsReferences
T. Ito, H. Shirakawa, and S. Ikeda, “Simultaneous polymerization and formation of polyacetylene film on the surface of concentrated soluble ziegler type catalyst solution”, J. Polym. Sc., Polym. Chem. Ed., vol. 12, p. 11, 1974.
C. K. Chiang, C.R. Fincher, Jr., Y.W. Park, J. Heeger, H. Shirakawa, E.J. Louis et al, “Electrical Conductivity in Doped Polyacetylene”, Phys. Rev. Lett., vol. 39, p. 1098, 1977.
Z. H. Xiong, D. Wu, Z. V. Vardeny, and J. Shi, “Giant magnetoresistance in organic spin-valves”, Nature, no. 427, p. 821, 2004.
Ö Mermer, G. Veeraraghavan, and T.L. Francis M, “Large magnetoresistance at room-temperature in small molecular weight organic semiconductor sandwich devices”, condmat/0501124, 2005.
Ö Mermer, G. Veeraraghavan, T.L. Francis, Y. Sheng, D.T. Nguyen, M. Wohlgennant et. al., “Large magnetoresistance in nonmagnetic π -conjugated semiconductor thin film devices”, Phys. Rev. B, vol. 72, p. 205202, 2005.
Y. Sheng, D. T. Nguyen, G. Veeraraghavan, Ö. Mermer, M. Wohlgenannt and U. Scherf, “Hyperfine interaction and magnetoresistance in organic semiconductors”, cond-mat/0602282, 2006.
Y. Norizoe and T. Kawakatsu, “Monte Carlo simulation of string-like colloidal assembly”, Europhys. Lett., vol. 72, no. 4, pp. 583-589, 2005.
B. Jönson, C. Peterson and B. Söderberg, “A variational Approach to the Structure and Thermodynamics of Linear Polyelectrolytes with Coulomb and Screened Coulomb Interactions”, Journal of Physical Chemistry, no. 99, p. 1251, 1995.
P. J. Flory, “Molecular size distribution in three dimensional polymers. I. Gelation”, Journal of the American Chemical Society, vol. 63, pp. 3083-3090, 1941.
J.I. Yamaura, S. Yonezawa, Y. Muraoka, Z. Hiroi, “Crystal structure of the pyrochlore oxide superconductor KOs2O6", arxiv:/cond-mat/0512683, 2005.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2007 Springer
About this paper
Cite this paper
Barrañón, A., Castillo-Alvarado, d.L. (2007). Magnetization Plateau Enhancement via a Simple Computational Model of Organic Spin Sandwiches. In: Sobh, T. (eds) Innovations and Advanced Techniques in Computer and Information Sciences and Engineering. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6268-1_17
Download citation
DOI: https://doi.org/10.1007/978-1-4020-6268-1_17
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-6267-4
Online ISBN: 978-1-4020-6268-1
eBook Packages: EngineeringEngineering (R0)