Dr. Luis Fern‡ndez Barqu’n

Profesor Titular (Lecturer)

Department of Earth Sciences and Condensed Matter Physics

Research Group 'Properties of metallic and magnetic materials' 

UNIVERSITY OF CANTABRIA

Ph:       (+34) - 942 - 20 14 05

Fax:     (+34) - 942 - 20 14 02 

e-mail:  barquinl@unican.es       

 

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UNIVERSITY STUDIES:

*          Physics degree, Universidad de Cantabria (1986).

*          Ph.D., Universidad de Cantabria (1992).

 

 

General topics:

*          Electrical and magnetic properties of metallic glasses and nanocrystalline alloys. Systematic studies on resistivity from low temperatures to crystallization. Magnetic ordering influence on resistivity. Effects of thermal treatments. Structural studies by X-ray and neutron diffraction.

*          Magnetic properties in fine-particle systems: Fe-oxides, GMR mechanical alloyed alloys and amorphous alloys obtained by chemical reduction.

*          Studies on spin-glass compounds of amorphous (Fe-based) and crystalline (Ce-based) nature.

*          Magnetic and structural characterisation of ferrites synthesised by the SHS method.

 

Research centers in which my work has been developed:

*          Facultad de Ciencias. Laboratorio de F’sica del Estado S—lido. Universidad de Cantabria.

*          Departamento de Electricidad y Electr—nica, Universidad del Pa’s Vasco (Spain).

*          Department of Electrophysics in the Technical University of Denmark, Lyngby (Denmark).

*          Institute Laue-Langevin. I.L.L., Grenoble (France).

*          ESRF, Grenoble (France).

*          Rutherford-Appleton Laboratory (ISIS), Didcot (U.K.).

*          C.S.I.C. Instituto de Estructura de la Materia, Madrid (Spain).

*          Istituto Nazionale di Fisica Nucleare, Frascati (Italy).

*          SRS Daresbury, Daresbury (U.K.).

*          University College London (U.K.).

*          PSI Villigen (Switzerland).

*          Risoe National Laboratory (Denmark).

*          Studsvik National Reactor (Sweden).

*          Lab. Leon-Brillouin (France).

 

Selected Publications:

*          J. Dawidowski, F. J. Bermejo, L. Fern‡ndez Barqu’n, P. Gorria, J. M. Barandiar‡n, A. C. Evans and J. Mayers. SHORT-TIME DYNAMICS ON A METALLIC GLASS AS PROBED BY DEEP INELASTIC NEUTRON SCATTERING. Physics Letters A 214, 59-64 (1996).

*          L. Fern‡ndez Barqu’n, J. C. G—mez Sal, S. N. Kaul, J. M. Barandiar‡n, P. Gorr’a, J. S. Pedersen and R. Heenan. SMALL-ANGLE NEUTRON SCATTERING BEHAVIOR OF Fe91Zr9 GLASS UNDER MAGNETIC FIELD. J. Appl. Phys. 79, 5146-5148 (1996).

*          D. G—mez Plaza, L. Fern‡ndez Barqu’n, J. Garc’a Soldevilla, R. Antras and J. C. G—mez Sal. ANNEALING AND MAGNETIC FIELD EFFECTS ON THE RESISTIVITY OF Fe-RICH Fe-Zr GLASSES. Sol. St. Comm. 102, 353-357 (1997).

*          J. M. Barandiar‡n, P. Gorr’a, I. Orœe, M. L. Fdez-Gubieda, F. Plazaola, J. C. G—mez Sal, L. Fern‡ndez Barqu’n and L. Fournes. MAGNETIC AND TRANSPORT PROPERTIES OF Fe-Zr-B-(Cu) AMORPHOUS ALLOYS. J. Phys.: Condens. Matt. 9, 5671-5685 (1997).

*          Q. A. Pankhurst, L. Fern‡ndez Barqu’n, J. D. Wicks, R. McGreevy and M. R. J. Gibbs. STRUCTURAL AND MAGNETIC ANISOTROPY IN AMORPHOUS ALLOY RIBBONS. J. Phys.: Condens. Matt. 9, L375-383 (1997).

*          I. P. Parkin, G. Elwin, L. Fern‡ndez Barqu’n, Q. T. Bui, Q. A. Pankhurst, A. Komarov and Y. G. Morozov. SELF PROPAGATING HIGH TEMPERATURE SYNTHESIS OF HEXAGONAL FERRITES MFe12O19 (M = Sr, Ba). Advanced Materials 9, 643-645 (1997).

*          L. Fern‡ndez Barqu’n, J. C. G—mez Sal, P. Gorr’a, J. S. Garitaonandia and J. M. Barandiar‡n. CRYSTAL STRUCTURE AND MAGNETIC BEHAVIOUR OF NANOCRYSTALLINE Fe-Nb-Cu-SI-B ALLOYS STUDIED BY MEANS OF IN-SITU NEUTRON DIFFRACTION. J. Phys.: Condens. Matt. 10, 5027-5038 (1998).

*          N. S. Cohen, Q. A. Pankhurst and L. Fern‡ndez Barqu’n. STRUCTURAL AND MAGNETORESISTIVE PROPERTIES OF MECHANICALLY ALLOYED Fe-Co-Ag. J. Phys.: Condens. Matt. 11, 8839-8853 (1999).

*          G. D. Forster, L. Fern‡ndez Barqu’n, R. L. Bilsborrow, Q. A. Pankhurst, I. P. Parkin and W. A. Steer. SODIUM BOROHYDRIDE REDUCTION OF AQUEOUS IRON- ZIRCONIUM SOLUTIONS: CHEMICAL ROUTES TO AMORPHOUS AND NANOCRYSTALLINE Fe-Zr-B ALLOYS. J. Mater. Chem. 9, 2537-2544 (1999).

*          M. V. Kuznetsov, L. Fern‡ndez Barqu’n, Q. A. Pankhurst and I. P. Parkin. SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS OF BARIUM-CHROMIUM FERRITES Ba12-xCrxO19 (0 < x < 6.0). J. Phys. D: Appl. Phys. 32, 2590-2598 (1999).

*          P. D. Babu, S. N. Kaul, L. Fern‡ndez Barqu’n, J. C. G—mez Sal, W. H. Kettler and M. Rosenberg. ELECTRON-ELECTRON INTERACTION, QUANTUM INTERFERENCE AND SPIN FLUCTUATIONS IN THE RESISTIVITY OF Fe-RICH Fe-Zr METALLIC GLASSES. I. J. Modern Physics B 13, 141-159 (1999).

*          M. D. Aguas, L. Affleck, I. P. Parkin, M. V. Kuznetsov, W. A. Steer, Q. A. Pankhurst, L. Fern‡ndez Barqu’n, M. A. Roberts, M. I. Boamfa y J. A. A. J. Perenbloom. THE EFFECT OF LARGE MAGNETIC FIELD ON SOLID STATE COMBUSTION REACTIONS: NOVEL MICROSTRUCTURE, LATTICE CONTRACTION AND REDUCED COERCITIVITY IN BARIUM HEXAFERRITE. J. Mater. Chem. 10, 235-237 (2000).

*          A. Hernando, P. Crespo, F. J. Casta–o, J. Arcas, M. Multigner, J. M. Barandiar‡n and L. Fern‡ndez Barqu’n. THERMOREMANENCE ANOMALY IN Fe-Zr(B, Cu) INVAR METALLIC GLASSES: VOLUME EXPANSION INDUCED FERROMAGNETISM. Phys. Rev. B 61, 3219-3222 (2000).

*          J. S. Garitaonandia, P. Gorr’a, L. Fern‡ndez Barqu’n and J. M. Barandiar‡n. LOW TEMPERATURE MAGNETIC PROPERTIES OF Fe NANOGRAINS IN AN AMORPHOUS Fe-Zr-B MATRIX. Phys. Rev. B 61, 6150-6155 (2000).

*          Q. A. Pankhurst, N. S. Cohen, L. Fern‡ndez Barqu’n , M. R. J. Gibbs and G. V. Smirnov. MOMENT CANTING AND STRUCTURAL ANISOTROPY IN AMORPHOUS ALLOYS: EXPERIMENTS USING SYNCHROTRON M…SSBAUER RADIATION. J. Non-Cryst. Sol. 287, 81-87 (2001).

*          D. H. Ucko, Q. A. Pankhurst, L. Fern‡ndez Barqu’n, J. Rodr’guez Fern‡ndez and S. F. J. Cox. MAGNETIC RELAXATION IN THE NANOSCALE GRANULAR ALLOY Fe20Cu20Ag60. Physical Rev.iew B 64, 104433-1-13 (2001).

*          Q. A. Pankhurst., D. H. Ucko, L. Fern‡ndez Barqu’n and R. Garc’a Calder—n. NON-DIPOLAR MAGNETIC COUPLING IN A STRONGLY INTERACTING SUPERPARAMAGNET: NANOGRANULAR Fe26Cu8Ag66. J. Magn. Magn. Mat. 266, 131-141 (2003).

*          L. Fern‡ndez Barqu’n, J. C. G—mez Sal, P. Gorria, J. S. Garitaonandia and J. M. Barandiar‡n. DYNAMIC SUSCEPTIBILITY OF REENTRANT Fe-RICH INHOMOGENEOUS AMORPHOUS ALLOYS. European Physical Journal B 35, 3-12 (2003).

*          Q. A. Pankhurst, A. Yedra Mart’nez and L. Fern‡ndez Barqu’n. INTERFACIAL EXCHANGE PINNING IN AMORPHOUS Fe-B NANOPARTICLES. Physical Review B 69, 212401 1-4 (2004).

*          P. Gorria, D. Mart’nez-Blanco, J. A. Blanco, A. Hernando, J. S. Garitaonandia, L. Fern‡ndez Barqu’n, J. Campo and R. Smith. INVAR EFFECT IN FCC Fe-Cu SOLID SOLUTIONS. Physical Review B 69, 214421 1-4 (2004).

*          R. Garc’a Calder—n, L. Fern‡ndez Barqu’n, S. N. Kaul, J. C. G—mez Sal, P. Gorria, J. S. Pedersen and R. K. Heenan. SMALL-ANGLE NEUTRON SCATTERING STUDY OF A MAGNETICALLY INHOMOGENOUS AMORPHOUS ALLOY WITH REENTRANT BEHAVIOR. Physical Review B 71, 134413 1-9 (2005).

*          P. Gorria, D. Mart’nez-Blanco, J. A. Blanco, M. J. PŽrez, A. Hernando, L. Fern‡ndez Barqu’n, and R. Smith. HIGH-TEMPERATURE INDUCED FERROMAGNETISM ON g-FE PRECIPITATES IN FeCu SOLID SOLUTIONS. Physical Review B 72, 14401 1-7 (2005).

*          L. Fern‡ndez Barqu’n and R. Garc’a Calder—n. NON-LINEAR AC SUSCEPTIBILITY BEHAVIOUR OF COLLECTIVE DYNAMICS IN HETEROGENEOUS NANOMAGNETIC SYSTEMS. J. Phys: Conf. Series 17, 87-100 (2005).

*          J. GutiŽrrez, F. J. Bermejo, J. M. Barandiar‡n, S. P. Cottrell, P. Romano, C. Mondelli, J. R. Stewart, L. Fern‡ndez Barqu’n, and A. Pe–a. ROLE OF DISORDER AND COMPETING FERROMAGNETIC AND ANTIFERROMAGNETIC INTERACTIONS IN THE MAGNETIC, ELECTRICAL AND DYNAMICAL PROPERTIES OF La0.7Pb0.3(Mn1-xFex)O3, 0²x²2 MANGANITES. Physical Review B 73, 054433 1-10 (2006).

*          S. N. Kaul, S. Kumar, J. Rodr’guez Fern‡ndez and L. Fern‡ndez Barqu’n. UNCONVENTIONAL SUPERCONDUCTIVITY IN LaAg1-xMnx: RELEVANCE OF SPIN FLUCTUATION MEDIATED PAIRING. Europhysics Letters  74, 138-144 (2006).

*          S. N. Kaul, A. D«Santoshini, A. C. Abhyankar, L. Fern‡ndez Barqu’n and P. Henry. THERMOELASTIC MARTENSIC TRANSFORMATION IN FERROMAGNETIC NI-FE-AL ALLOYS: EFFECTS OF SITE DISORDER. Applied Physics Letters 89, 93119-1-3 (2006).

*          L. Fern‡ndez Barqu’n, A. Yedra, S. N. Kaul, M. L. Fdez-Gubieda, J. F. W. Mosselmans, Q. A. Pankhurst. X-RAY ABSOROPTION ANALYSIS OF CORE-SHELL MAGNETIC (FE, CO)-B NANOPARTICLES OF AMORPHOUS AND CRYSTALLINE STRUCTURE OBTAINED BY CHEMICAL REDUCTION. J. Non-Cryst. Sol. 353, 733-737 (2007).

*          D. P. Rojas, L. Fern‡ndez Barqu’n, J. Rodr’guez Fern‡ndez, J. I. Espeso and J. C. G—mez Sal. SIZE EFFECTS IN THE MAGNETIC BEHAVIOUR OF MILLED TBAL2. J. Phys.: Condens. Matt. 19, 186214 1-15 (2007).