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  1. No Access

    Article

    Low-field magnetoresistance in La0.7Ca0.3MnO3 manganite compounds prepared by the spray drying technique

    Calcium-substituted lanthanum manganite compounds were synthesized by the spray drying technique. This method—whose main advantages are versatility, high reproducibility and scalability—yields small grain mate...

    B. Vertruyen, A. Rulmont, R. Cloots, J.-F. Fagnard… in Journal of Materials Science (2005)

  2. No Access

    Article

    Two Peak Effect in GMR: A Chemical Effect?

    We show that the synthesis conditions have a dramatic influence on the resistivity behavior of calcium and sodium doped LaMnO3. Several samples prepared by lowtemperature techniques exhibit a double-peaked curve ...

    B. Vertruyen, A. Rulmont, S. Dorbolo, H. Bougrine… in MRS Online Proceedings Library (1999)

  3. No Access

    Article

    Phase Transition and Pattern of Self-Organized Microstructures in Presence of Mobile Impurities

    A growth model starting from a surface and in presence of mobile nonreactive localized impurities has been studied for the statistical physics of the microstructure and the surface roughness through simulation...

    K. Ivanova, M. Ausloos in MRS Online Proceedings Library (1999)

  4. No Access

    Chapter

    Vortex Lattice Melting and Viscosity in Y0.6Dy0.4Ba2Cu3O7−X Superconductor Studied by Electrical Resistivity

    Among the scientific problems raised by High Critical Temperature (Tc) Superconductors (HTcS) extensive experimental research has clearly shown the complexity of these perovskite cuprate compounds both because of...

    M. Pekala, W. Gadomski, I. Nedkov, H. Bougrine… in Symmetry and Pairing in Superconductors (1999)

  5. No Access

    Chapter

    Electric Field Effects in High-T C Cuprates with Different Bulk and Surface Conductivities

    Dependences of T c on hole concentration in YBa2Cu3O7-y and Bi2Sr2CaCu2O8+x cuprates have been calculated in the transverse electric field E in the framework of t...

    P. Konsin, B. Sorkin, M. Ausloos in Symmetry and Pairing in Superconductors (1999)

  6. No Access

    Article

    Studies of Crack Pattern in Two Dimensional Media as Resulting From Ion Beam like or Freezing Destruction

    We have numerically studied various models for crack formation in the slow dynamical regime. Two different aspects are presented herein: (i) sputtering with reconstruction and (ii) internal destruction of a po...

    M. Ausloos, N. Vandewalle, R. D’Hulst in MRS Online Proceedings Library (1998)

  7. No Access

    Article

    Non Trivial Processes for Obtaining Bi-Based High Tc Superconductors

    Dysprosium doped Bi-based 2212 ceramics were synthesized by a melt-texturing growth process in a 1.2T magnetic field, applied perpendicularly to the main axis of a cylindrically shaped sample. The materials we...

    R. Cloots, M. Ausloos in MRS Online Proceedings Library (1998)

  8. No Access

    Article

    Directional solidification by appropriate chemically active single crystal seed: An alternative way of generating large superconducting 123 single domain

    A Dy2O3 single crystal has been used as a seed for the growth of isothermally melt-textured Dy-123 material. The nucleation-controlled step has been observed to be related to the heterogeneous nucleation of 211 p...

    R. Cloots, Fr. Auguste, A. Rulmont, N. Vandewalle… in Journal of Materials Research (1997)

  9. No Access

    Article

    Phase Transitions, Patterns and Statistical Mechanics of Front Propagation in a Dynamic Random Impurity Model for Strip, Unusual Trees and Other Geometries

    A dynamic random impurity model is studied lor describing the evolution of an advancing interface through a multiphase random medium containing mobile impurities. A short range repulsion between the front and ...

    N. Vandewalle, M. Ausloos in MRS Online Proceedings Library (1996)

  10. No Access

    Article

    Magnetic alignment in 2212 Bi-based superconducting system: Part I. Magnetic orientation of Bi2Sr2Ca1−x(RE)xCu2O8−y [(RE) = Gd, Dy, Ho, Er] powder dispersed in epoxy resin at room temperature

    The magnetic anisotropy of rare-earth substituted 2212 materials (Bi2Sr2Ca0.8RE0.2Cu2Ox with RE = Gd, Dy, Ho, Er) is put into evidence. Superconducting powder dispersed in epoxy resin is oriented under an externa...

    S. Stassen, R. Cloots, Ph. Vanderbemden, P. A. Godelaine… in Journal of Materials Research (1996)

  11. No Access

    Article

    Polarized light microstructure analysis of melt-textured DyBa2Cu3O7−x ceramics

    We report the microstructure of magnetically melt-textured Dy-123 samples, as observed by polarized light metallography. The phase dimensions, morphology, orientation, nature, and distribution are outlined. Gr...

    P. Diko, M. Ausloos, R. Cloots in Journal of Materials Research (1996)

  12. No Access

    Article

    Magnetic alignment in 2212 Bi-based superconducting system: II. Bi2Sr2Ca1−xDyxCu2O8−yx = 0.2 glass recrystallized in 0.6 T magnetic field

    Starting from a glassy precursor, Bi2Sr2Ca1−xDyxCu2O8−y (for x = 0.2) was recrystallized under a 0.6 T magnetic field. After splat quenching, the samples were heated and sintered at different temperatures T1, the...

    S. Stassen, R. Cloots, A. Rulmont, M. Ausloos in Journal of Materials Research (1995)

  13. No Access

    Article

    Simulated growth and microstructure of DyBa2Cu3O7−x with and without Dy2BaCuO5 addition

    We present optical observations of magnetically melt-textured DyBa2Cu3O7−x with and without 20 wt. % excess of Dy2BaCuO5. From these observations, we propose some kinetic mechanism of the growth of 123 compounds....

    N. Vandewalle, R. Cloots, M. Ausloos in Journal of Materials Research (1995)