1 J.M. García et al., “Magnetic behavior of an array of cobalt nanowires”, J. Appl. Phys. 85 (1999) 5480. J.M. García et al., “Characterization of cobalt nanowires by means of force microscopy”, IEEE Trans. Magn. 36 (2000) 2981.
2 J. P. Sinnecker et al., “Frequency dependence of the magnetoimpedance in amorphous CoP electrodeposited layers”, J. Appl. Phys. 87 (2000) 4825. J. M. García et al., “Determination of closure domains penetration in electrodeposited microtubes by combined magnetic force microscopy and giant magneto-impedance techniques”, J. Appl. Phys. 89 (2001) 3888.
3 J.M. García et al., “Quantitative interpretation of magnetic force microscopy images from soft patterned elements”, Appl. Phys. Lett. 79 (2001) 656. J.M. García et al., “MFM imaging of nanowires and elongated patterned elements”, J. Magn. Magn. Mat 249 (2002) 163.
4 J.M. García-Martín et al. “Imaging magnetic vortices by magnetic force microscopy: experiments and modelling”, J. Phys. D: Appl. Phys. 37 (2004) 965.
5 A. Thiaville et al. “Micromagnetic study of Bloch-point-mediated vortex core reversal”, Phys. Rev. B 67 (2003) 094410.
6 J.L. Costa-Krämer et al., “Structure and magnetism of single phase epitaxial γ-Fe4N”, Phys. Rev. B 69 (2004) 144402. C. Martínez Boubeta et al. “Coverage effects on the magnetism of Fe/MgO(001) ultrathin films”, Phys. Rev. B 71 (2005) 0144407.
7 M. Jaafar et al., “Magnetic domain structure of nanohole arrays in Ni films”, J. Appl. Phys. 101 (2007) 09F513. A.Cebollada et al.,"Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition", Phys. Rev. B79, 014414 (2009)
8 J. Camarero et al., “Origin of the asymmetric magnetization reversal behavior in exchange-biased systems: competing anisotropies”, Phys. Rev. Lett. 95 (2005) 057204; Ll. Bacells et al., "Exchange bias in laterally oxidized Au/Co/Au nanopillars", Appl.Phys.Lett. 94 (2009) 062502.
9 C. Clavero et al., “Control of the perpendicular magnetic anisotropy in FePd films via Pd capping deposition" Appl. Phys. Lett. 92 (2008) 162502; C. Clavero et al., “Order and phase nucleation phase nucleation in nonequilibrium nanocomposite Fe-Pt thin films with perpendicular magnetic anisotropy”, Phys. Rev. B 79, 104436 (2009).
10 J. B. González-Díaz et al., “Plasmonic Au/Co/Au nanosandwiches with enhanced magneto-optical activity”, Small 4 (2008) 202; V.V. Temnov et al., “Active magnetoplasmonics in hybrid metal/ferromagnet/metal microinterferometers”, Nature Photonics 4, 107 (2010) .
11 A. Thiaville, J. Miltat, and J. M. García, “Magnetic force microscopy: imaging of nanostructures and contrast modeling” in “Magnetic microscopy of nanostructures”, H. P. Oepen and H. Hopster (Eds.), Springer-Verlag, Berlin-Heidelberg-New York (2004).
Born in 1972, José Miguel García-Martín studied at the Universidad Complutense de Madrid (Spain) and obtained his PhD Thesis in 1999, Prof. Manuel Vázquez (ICMM-CSIC) being the supervisor. He studied advanced magnetic materials that were electrolytically prepared (i.e. at low cost), which made them useful not only for basic science but also for potential applications in magnetic storage and sensors; in particular, cobalt nanowires and cobalt-phosphorus microtubes. The cobalt nanowires (diameter: 70-200 nm) exhibited a multidomain state and their magnetic properties arose from the competition between the shape anisotropy and the interactions among neighboring wires 1. The cobalt-phosphorus microtubes showed radial anisotropy with closure domains and exhibited giant magnetoimpedance (GMI) even for magnetic fields as high as hundreds of Oe, which made them interesting for sensor applications2.
Afterwards he moved to the Laboratoire de Physique des Solides (Université Paris-Sud & CNRS) in Paris (France) for a post doctoral stay (2000–2002) with an individual Marie Curie fellowship, where he worked with Prof. Jacques Miltat and Dr. André Thiaville in magnetic force microscopy (MFM) and micromagnetic simulations, mainly analyzing soft magnetic materials that were interesting for spintronics. They showed that the tip-induced perturbations in MFM imaging could be quantitatively explained and, properly used, helped to reveal the magnetization direction in soft magnetic samples 3. They used cobalt nanowires as MFM tips for imaging ferromagnetic submicrometer dots in a vortex state 4 and showed that the vortex core reversal was mediated by a singularity of the magnetization field, namely a Bloch-point 5.
Back to Spain in 2003, Dr. García-Martín started working at the “Magnetic Nanostructures and Magnetoplasmonics” research line at the Instituto de Microelectrónica de Madrid (IMM-CSIC). His main research activities have been focused on:
- Correlation among structure, morphology and magnetism in epitaxial thin films 6 and magnetic nanostructures 7.
- Magnetization reversal in exchange-biased systems for spintronics 8.
- Magnetic nanostructures with perpendicular anisotropy 9 for magnetic storage.
- Noble metal-ferromagnetic metal nanostructures with applications in magnetoplasmonics 10 .
José Miguel García-Martín is an expert in scanning probe microscopy (SPM) techniques, especially AFM and MFM, and in magnetic characterization and modeling. He has also a wide experience in sample growth using electrochemical methods and sputter deposition.
He has published more than 50 papers in international refereed journals (about 700 citations to his works), has presented a similar number of communications to international conferences, and has co-written one book chapter 11 .
