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Magnetism Group Departamento de Física
- About us
The group is interested in the research of different aspects of magnetism and molecular electronics, with focus on the fundamental properties of molecules, clusters, nano-structures and macroscopic media. We are interested, besides basic physical aspects, in possible applications of the above topics on renewable-energy-and cost-saving potential, high efficiency and reliability of new and ecologic technologies.
- Research Areas
People
Young Researchers UTFSM:
Postdoctoral Fondecyt Researchers:
Graduate students:
Date: News 2012
Available positions
Positions are currently available at any level. Graduate and undergraduate students as well as postdocs are welcome to send an application (C. Vitae). Funding can be achieved either from our scientific grants or from external agencies, like FONDECYT and others. - Publications (Since 2007) ___________________2013___________________
63. J. A. Otálora, J. A. López-López, P. Landeros, P. Vargas, and A. S. Núñez, Breaking of chiral symmetry in vortex domain wall propagation in ferromagnetic nanotubes, Journal of Magnetism and Magnetic Materials, (accepted). 62. D. Cortes-Ortuño and P. Landeros, Influence of the Dzyaloshinskii-Moriya interaction on the spin-wave spectra of thin films, Journal of Physics: Condensed Matter 25, 156001 (2013). 61. J. E. Valdes, C. Celedon, R. Segura, I. Abril, R. Garcia-Molina, C. D. Denton, N. R. Arista, and P. Vargas, Energy loss distribution of proton beams at normal incidence on multi-walled carbon nanotubes, Carbon, 52 (2013). 60. D. H. Kim, N. Aimon, L. Bi, J. M. Florez, G. F. Dionne and C. A. Ross, Magnetostriction in epitaxial SrTi1-xFexO3-d perovskite films with x=0.13 and 0.35, Journal of Physics: Condensed Matter, 026002 (2013). ___________________2012___________________
59. E. Suarez Morell, L. E. F. Foa Torres , Radiation effects on the electric properties of bilayer graphene, Physical Review B 86, 125 (2012). 58. R. A. Gallardo, O. Idigoras, P. Landeros, and A. Berger, Analytical derivation of critical exponents of the dynamic phase transition in the mean-field approximation, Physical Review E 86, 051101 (2012). 57. J. A. Otálora, J. A. López-López, A. S. Núñez, and P. Landeros, Domain wall manipulation in magnetic nanotubes induced by electric current pulses, Journal of Physics: Condensed Matter 24, 436007 (2012). 56. J. M. Florez, S. P. Ong, M. C. Onbasli, G. F. Dionne, P. Vargas, G. Ceder, and C. A. Ross, First-principles insights on the magnetism of cubic SrTi1-xCoxO3-d, Applied Physics Letters 100, 252904 (2012). 55. R. L. Rodriguez-Suarez, L. H. Vilela-Leão, T. Bueno, J. Mendes, P. Landeros, S. M. Rezende, and A. Azevedo, Tunable misalignment of ferromagnetic and antiferromagnetic easy axes in exchange biased bilayers, Applied Physics Letters 100, 242406 (2012). 54. P. Landeros and D. L. Mills, Spin waves in periodically perturbed films, Physical Review B 85, 054424 (2012). 53. J. A. Otálora, J. A. López-López, P. Vargas, and P. Landeros, Chirality switching and propagation control of a vortex domain wall in ferromagnetic nanotubes, Applied Physics Letters 100, 072407 (2012). 52. J. A. López-López, D. Cortés-Ortuño, and P. Landeros, Role of anisotropy on the domain wall properties of ferromagnetic nanotubes, Journal of Magnetism and Magnetic Materials 324, 13 (2012). 51. I. Barsukov, P. Landeros, R. Meckenstock, J. Lindner, D. Spoddig, Zi- An Li, B. Krumme, H. Wende, D. L. Mills, and M. Farle, Tuning magnetic relaxation by oblique deposition, Physical Review B 85, 014420 (2012). 50. J. M. Florez and P. Vargas, Factorizing magnetic fields triggered by the Dzyaloshinskii-Moriya interaction: Application to magnetic trimers, Journal of Magnetism and Magnetic Materials 324, 83 (2012). 49. O. J. Suarez, L. M. Perez, D. Laroze, and D. Altbir, Magnetostatic interactions in cylindrical nanostructures with non-uniform magnetization, Journal of Magnetism and Magnetic Materials 324, 9 (2012). ___________________2011___________________
48. A. R. Fernandes Nt, J. A. Otálora, P. Vargas, and J. d'Albuquerque e Castro, Oscillations in the spatial distribution of current in nanotubes and nanowires, Journal of Applied Physics 110, 093720 (2011). 47. D. Laroze, J. Bragard, O. J. Suarez and H. Pleiner, Characterization of the chaotic magnetic particle dynamics, IEEE Transactions on magnetics Intermag CG-02 (2011). 46. J. Bragard, H. Pleiner, O. J. Suarez, P. Vargas, J. A. C. Gallas, and D. Laroze, Chaotic dynamics of a magnetic nanoparticle, Physical Review E 84 037202 (2011). 45. O. Idigoras, A. K. Suszka, P. Vavassori, P. Landeros, J. M. Porro, and A. Berger, Collapse of hard-axis behavior in uniaxial Co-films, Physical Review B 84, 132403 (2011). 44. E. R. P. Novais, P. Landeros, A. G. S. Barbosa, M. D. Martins, F. Garcia, and A. P. Guimarães, Properties of magnetic nanodots with perpendicular anisotropy, Journal of Applied Physics 110, 053917 (2011). 43. A. S. Núñez, E. Suárez, P. Vargas, Trigonal distortion of topologically confined channels in bilayer Graphene, Applied Physics Letters 98, 262107 (2011). 42. N. Reckers, J. Cucchiara, O. Posth, C. Hassel, F. M. Römer, R. Narkovic, R. A. Gallardo, P. Landeros, H. Zähres, S. Mangin, J. A. Katine, E. E. Fullerton, G. Dumpich, R. Meckenstock, J. Lindner, and M. Farle, Effect of microwave irradiation on spin-torque driven magnetization precession in nanopillars with magnetic perpendicular anisotropy, Physical Review B 83, 184427 (2011). 41. R. L. Rodríguez-Suárez, A. B. Oliveira, J. R. L. de Almeida, T. Bueno, L. H. Vilela-Leão, P. Landeros, S. M. Rezende, and A. Azevedo, Critical thickness investigation of magnetic properties in exchange-coupled bilayers, Physical Review B 83, 224418 (2011). 40. L. Chen, J. Shen, J. E. Valdés, P. Vargas, V. A. Esaulov, Energy loss of keV fluorine ions scattered off a missing-row reconstructed Au(110) surface under grazing incidence, Physical Review A 83, 032901 (2011). 39. C. Garcia, J. M. Florez, P. Vargas, C. A. Ross, Effect of the exchange bias coupling strength on the magnetoimpedance response, Journal of Applied Physics 109, 07D735 (2011). 38. J. M. Florez, P. Vargas, and C. García Thermal observables in coupled Cr7Ni molecular rings: Role and quantification of spin-entanglement, Journal of Applied Physics 109, 07B109 (2011). ___________________2010___________________
37. J. M. Florez, A. S. Núñez, and P. Vargas, Quenching points of dimeric single-molecule magnets: Exchange interaction effects, Journal of Magnetism and Magnetic Materials 322, 3623 (2010). 36. P. Landeros, R. A. Gallardo, O. Posth, J. Lindner, and D. L. Mills, Role of the spin-transfer in the ferromagnetic resonance response of thin films, Physical Review B 81, 214434 (2010). 35. C. García, J. M. Florez, P. Vargas, and C. A. Ross, Asymmetrical giant magnetoimpedance in exchange–biased NiFe, Applied Physics Letters 96, 232501 (2010). 34. P. Landeros and Álvaro S. Núñez, Domain wall motion on magnetic nanotubes, Journal of Applied Physics 108, 033917 (2010). 33. J. M. Florez, A. S. Núñez, C. García, and P. Vargas, Magnetocaloric features of complex molecular magnets: The (Cr7Ni)2Cu molecular magnet and beyond, Journal of Magnetism and Magnetic Materials 322, 2810 (2010). 32. J. Mejía-López, D. Altbir, P. Landeros, J. Escrig, A. H. Romero, Igor V. Roshchin, C.-P. Li, M. R. Fitzsimmons, X. Batlle, and Ivan K. Schuller, Development of vortex state in circular magnetic nanodots: theory and experiment, Physical Review B 81, 184417 (2010). 31. L. Chen, J. E. Valdés, P. Vargas, and V. A. Esaulov, Surface channelling and energy losses of 4 keV hydrogen and fluorine ions in grazing scattering on Au(111) and missing row reconstructed Au(110) surfaces, Journal of Physics: Condensed Matter 22, 345005 (2010). 30. A. L. González, P. Landeros, and A. S. Núñez, Spin wave spectrum of magnetic nanotubes, Journal of Magnetism and Magnetic Materials 322, 530 (2010). 29. E. Suárez, J. Correa, P. Vargas, M. Pacheco, and Z. Barticevic, Flat bands in slightly twisted bilayer graphene: Tight-binding calculations, Physical Review B 82, 121407 (2010). 28. I. Kyriakou, C. Celedón, R. Segura, D. Emfietzoglou, P. Vargas, J. Valdés, I. Abril, C. Denton, K. Kostarelos, R. García-Molina, Energy Loss of Protons in Carbon Nanotubes: Experiments and Calculations, Nuclear Instruments and Methods in Physics Research B 268, 1781 (2010). ___________________2009___________________
27. F. Ilievski, A. Cuchillo, W. Nunes, K. Knobel, C. Ross, and P. Vargas, Thermal behavior of hard-axis magnetization in noninteracting particles with uniaxial anisotropy, Applied Physics Letters 95, 202503 (2009). 26. J. M. Florez, A. S. Núñez, and P. Vargas, Quantum Tunneling in Nanomagnetic Systems with Different Unialxial Anisotropy Order, Nanotechnology 20, 465403 (2009). 25. P. Landeros, O. J. Suarez, A. Cuchillo, and P. Vargas, Equilibrium states and vortex domain wall nucleation in ferromagnetic nanotubes, Physical Review B 79, 024404 (2009). 24. J. Lindner, I. Barsukov, C. Raeder, C. Hassel, O. Posth, R. Meckenstock, P. Landeros, and D. L. Mills, Two-Magnon damping in thin films in case of canted magnetization: Theory versus Experiment, Physical Review B 80, 224421 (2009). 23. O. J. Suarez, P. Vargas, and E. E. Vogel, Energy and Force between Two Magnetic Nanotubes, Journal of Magnetism and Magnetic Materials 321, 3658 (2009). 22. J. M. Florez, P. Vargas, and A. S. Núñez, Instantons and Magnetization Tunneling: Beyond the Giant-Spin Approximation, Physica B 404, 2791 (2009). 21. R. Soto-Garrido, G. Martínez, M. Baibich, J. M. Florez, and P. Vargas, Metastable states in the triangular-lattice ising model studied by Monte Carlo simulations: Application to the spin-chain compound Ca3Co2O6, Physical Review B 79, 184422 (2009). 20. E. Cisternas, F. Stavale, M. Flores, C. A. Achete, and P. Vargas, First-principles calculation and scanning tunneling microscopy study of highly oriented pyrolytic graphite (0001), Physical Review B 79, 205431 (2009). 19. B. Leighton, O. J. Suarez, P. Landeros, and J. Escrig, Magnetic phase diagrams of barcode-type nanostructures, Nanotechnology 20, 385703 (2009). 18. P. Landeros, P. R. Guzmán, R. Soto-Garrido, and J. Escrig, Magnetostatic fields in tubular nanostructures, Journal of Physics D: Applied Physics 42, 225002 (2009). 17. D. Laroze, P. Vargas, C. Cortés, G. Gutierrez, Dynamics of two interacting dipoles, Journal of Magnetism and Magnetic Materials 320, 1440 (2008). 16. P. Landeros, J. Escrig, and D. Altbir, Vortex structures in cylindrical magnetic nanoparticles, in Electromagnetic, Magnetostatic, and Exchange-interaction Vortices in Confined Magnetic Structures, Edited by E. O. Kamenetskii, Research Signpost (Kerala) ISBN 978-81-7895-373-1 (2008). [Book Chapter] 15. O. J. Suarez, P. Vargas, J. Escrig, P. Landeros, D. Altbir, and D. Laroze, Magnetic phase diagram of a nanocone, Journal of Physics: Conference Series 134, 012020 (2008). [Proceeding] 14. E. Cisternas, M. Flores, and P. Vargas, Superstructures in arrays of rotated graphene layers: Electronic structure calculations, Physical Review B 78, 125406 (2008). 13. J. E. Valdés, P. Vargas, C. Celedón, E. Sánchez, L. Guillemot, and V. A. Esaulov, Electronic density corrugation and crystal azimuthal orientation effects on energy losses of hydrogen ions in grazing scattering on a Ag(110) surface, Physical Review A 78, 032902 (2008). 12. P. Landeros, Rodrigo E. Arias, and D. L. Mills, Two Magnon Scattering in Ultrathin Ferromagnets; The Case Where the Magnetization is Out of Plane, Physical Review B 77, 214405 (2008). 11. J. M. Florez, and P. Vargas, Path integral study of phase transitions for thermons in macroscopic quantum tunneling, Microelectronics Journal 39, 1341 (2008). ___________________2007___________________
10. D. Laroze, J. Escrig, P. Landeros, D. Altbir, M. Vazquez, and P. Vargas, A detailed analysis of dipolar interactions in arrays of bi-stable magnetic nanowires, Nanotechnology 18, 415708 (2007). 09. R. Piccin, D. Laroze, M. Knobel, P. Vargas, and M. Vazquez, Magnetotatic interactions between two magnetic wires, Europhysics Letters 78, 67004 (2007). 08. J. Escrig, P. Landeros, D. Altbir, E. E. Vogel, and P. Vargas, Phase diagrams of magnetic nanotubes, Journal of Magnetism and Magnetic Materials 308, 233 (2007). 07. P. Landeros, S. Allende, J. Escrig, E. Salcedo, D. Altbir, and E. E. Vogel, Reversal modes in magnetic nanotubes, Applied Physics Letters 90, 102501 (2007). 06. J. Escrig, M. Daub, P. Landeros, K. Nielsch, and D. Altbir, Angular dependence of coercivity in magnetic nanotubes, Nanotechnology 18, 445706 (2007). (Cover of Issue 44 Vol. 18) 05. D. Altbir, J. Escrig, P. Landeros, F. S. Amaral, and M. Bahiana, Vortex core size in interacting cylindrical nanodots arrays, Nanotechnology 18, 485707 (2007). 04. J. Días-Valdés, F. A. Gutiérrez, A. R. Matamala, C. D. Denton, P. Vargas, and J. E. Valdés, Ground state of a hydrogen ion molecule inmersed in a inhomogeneous electron gas, Nucl. Instr. and Meth. in Phys. Res. B 256, 81 (2007). 03. D. Laroze, S. A. Baranov, P. Vargas, and M. Vazquez, On the theory of nucleation in cylindrical magnetic nanoparticles, phys. stat. sol. (c) 4 , 4170 (2007) . 02. J. Escrig, P. Landeros, D. Altbir, M. Bahiana, and J. d’Albuquerque e Castro, Role of interactions in layered nanorings, International Journal of Nanotechnology 4, 531 (2007). 01. J. Escrig, P. Landeros, D. Altbir, and E. E. Vogel, Effect of anisotropy in magnetic nanotubes, Journal of Magnetism and Magnetic Materials 310, 2448 (2007). Sponsors
- · Universidad de Santiago de Chile, Chile (www.usach.cl) · Universidad de Chile, Chile (www.uchile.cl) · Pontificia Universidad Católica de Chile, Chile (www.puc.cl) · Universidad de Atacama, Chile (www.uda.cl) · Universidad Tarapacá de Arica, Chile (www.uta.cl) · Universidad de la Frontera, Chile (www.ufro.cl) · University of California Irvine, USA (www.uci.edu) · Massachusetts Institute of Technology, USA (http://web.mit.edu) · Universität Duisburg-Essen, Germany (www.uni-due.de) · Universidade Federal do Rio de Janeiro, Brazil (www.ufrj.br) · Universidade Estadual de Campinas, Brazil (www.unicamp.br) · Laboratório Nacional de Luz Síncrotron, Brazil (www.lnls.br) · Universidade federal de Pernambuco, Brazil (www.ufpe.br) · Centro Brasileiro de Pesquisas Físicas, Brazil (www.cbpf.br) · CIC nanoGUNE Consolider, San Sebastian-Donostia, Spain (www.nanogune.eu) · Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Germany (www.hzdr.de)
Former members · Dr. Américo Cuchillo (Universidad de Atacama, Chile) · Dr. Eduardo Cisternas (Universidad de la Frontera, Chile) · Patricio Guzmán (Universidad técnica Federico Santa María) · Dr. David Laroze (Universidad de Tarapacá, Chile) · M. Sc. Rodrigo Soto (PhD student at University of Illinois, USA)
- Other sites · Departamento de Física, Universidad técnica Federico Santa María · Nucleo Milenio Magnetismo Básico y Aplicado · Centro para el Desarrollo de la Nanociencia y Nanotecnología · Centro de Nanociencias de Valparaíso · Laboratorio de Colisiones atómicas UTFSM |
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