División de Nanociencias y Materiales: Envíos recientes

Mostrando ítems 401-420 de 589

    • Adiabatic magnetocaloric effect in Ni50Mn35In15 ribbons 

      Álvarez Alonso, Pablo; Aguilar Ortiz, Christian Omar; Camarillo García, Juan Pablo Ramón; Salazar Jaramillo, Daniel; Flores Zúñiga, Horacio; Chernenko, Volodymyr (2016-11)
      "Heusler-type Ni-Mn-based metamagnetic shape memory alloys (MetaMSMAs) are promising candidates for magnetic refrigeration. To increase heat exchange rate and efficiency of cooling, the material should have a high ...

    • Enhanced thermal conductivity of carbon fiber/phenolic resin composites by the introduction of carbon nanotubes 

      Kim, Yoong Ahm; Kamio, S.; Tajiri, Takeyuki; Hayashi, Takuya; Song, Sungmoo; Endo, Morinobu; Terrones Maldonado, Mauricio; Dresselhaus, Mildred (2007-02)
      "The authors report a significant enhancement in the thermal conductivity of a conventional carbon fiber/phenolic resin composite system when adding highly crystalline multiwalled carbon nanotubes. They demonstrate that ...

    • An anticorrosive magnesium/carbon nanotube composite 

      Endo, Morinobu; Hayashi, Takuya; Itoh, Isao; Kim, Yoong Ahm; Shimamoto, Daisuke; Muramatsu, Hiroyukim; Shimizu, Yasuo; Morimoto, Shingo; Terrones Maldonado, Mauricio; Iinou, Satoshi; Koide, S. (2008-02)
      "Here, we report a drastically improved anticorrosive characteristic of magnesium alloy composites with the introduction of multiwalled carbon nanotubes. Highly depressed corrosion of nanotube-filled magnesium composite ...

    • Enhanced refrigerant capacity in two-phase nanocrystalline/amorphous NdPrFe17 melt-spun ribbons 

      Sánchez Valdés, Cesar Fidel; Ibarra Gaytán, Pablo Jesús; Sánchez Llamazares, José Luis; Ávalos Borja, Miguel; Álvarez Alonso, Pablo; Gorria, Pedro; Blanco Rodríguez, Jesús Angel (2014-05)
      "he magnetocaloric properties of NdPrFe17 melt-spun ribbons composed of nanocrystallites surrounded by an intergranular amorphous phase have been studied. The nanocomposite shows two successive second-order magnetic phase ...

    • Enhanced refrigerant capacity in Gd-Al-Co microwires with a biphase nanocrystalline/amorphous structure 

      Shen, Hongexian; Xing, Dawei; Sánchez Llamazares, José Luis; Sánchez Valdés, Cesar Fidel; Belliveau, H. F.; Wang, Huan; Qin, Faxiang; Liu, Yanfen; Sun, Jianfei; Srikanth, Hariharan; Phan, Manhhuong (2016-02)
      "A class of biphase nanocrystalline/amorphous Gd(50+5x)Al(30-5x)Co20 (x = 0, 1, 2) microwires fabricated directly by melt-extraction is reported. High resolution transmission electron microscopy and Fourier function transform ...

    • Elastocaloric effect in Ti-Ni shape-memory wires associated with the B2 ↔ B19' and B2 ↔ R structural transitions 

      Soto-Parra, Daniel Enrique; Vives, Eduard; Mañosa, Lluis; Matutes Aquino, José Andrés; Flores Zúñiga, Horacio; Planes, Antoni (2016-02)
      "We have studied the elastocaloric properties of Ti-Ni shape-memory wires subjected to specific heat treatments to decouple the B2 <-> R transition from the B2 <-> B19' one. The entropy values at moderate stresses (similar ...

    • Giant magnetocaloric effect in melt-spun Ni-Mn-Ga ribbons with magneto-multistructural transformation 

      Li, Zongbin; Zhang, Yudong; Sánchez Valdés, Cesar Fidel; Sánchez Llamazares, José Luis; Esling, Claude; Zhao, Xiang; Zuo, Liang (2014-01)
      "Magnetic refrigeration based on the magnetocaloric effect (MCE) may provide an energy-efficient and environment-friendly alternative to the conventional gas compression/expansion cooling technology. For potential applications, ...

    • High-quality InN films on MgO (100) substrates: the key role of 30 degrees in-plane rotation 

      Compeán García, Vicente Damián; Orozco Hinostroza, Ignacio Everardo; Escobosa Echavarria, Arturo; López Luna, Edgar; Rodríguez Vázquez, Angel Gabriel (2014-05)
      "High crystalline layers of InN were grown on MgO(100) substrates by gas source molecular beam epitaxy. Good quality films were obtained by means of an in-plane rotation process induced by the annealing of an InN buffer ...

    • Influence of Fe doping and magnetic field on martensitic transition in Ni–Mn–Sn melt-spun ribbons 

      Aguilar Ortiz, Christian Omar; Soto-Parra, Daniel Enrique; Álvarez Alonso, Pablo; Lázpita, Patricia; Salazar, Daniel; Castillo Villa, Pedro Osmany; Flores Zúñiga, Horacio; Chernenko, Volodymyr (Elsevier, 2016-04)
      "Mn-rich Ni-Mn-Sn metamagnetic shape memory alloys exhibiting magnetostructural transformation are of a great potential as the base materials for solid-state refrigeration. With the aim of fine tuning of the transformation ...

    • One-parameter isospectral special functions 

      Rosu Barbus, Haret-Codratian (2003)
      "Using a combination of the ladder operators of Pina [1] and the Pammetric operators of Mielnik [2] we introduce second order linear differential equations whose eigenfunctions are isospectral to the special functions of ...

    • Riccati nonhermiticity with application to the Morse potential 

      Cornejo Pérez, Octavio; López Sandoval, Román; Rosu Barbus, Haret-Codratian (2005)
      "A supersymmetric one-dimensional matrix procedure, similar to the relationships of the same type between Dirac and Schrodinger equations in particle physics, is described in the general terms. By this means, we are able ...

    • Electromagnetic transmittance in alternating material-metamaterial layered structures 

      Carrera Escobedo, Víctor Hugo; Rosu Barbus, Haret-Codratian (2017)
      "Using the transfer matrix method we examine the parametric behavior of the transmittance of TE and TM electromagnetic plane waves propagating in frequency range which are far from the absorption bands of a periodic ...

    • Nonlinear second order Ode's: factorizations and particular solutions 

      Cornejo Pérez, Octavio; Rosu Barbus, Haret-Codratian (2005)
      "We present particular solutions for the following important nonlinear second order differential equations: modified Emden, generalized Lienard, convective Fisher, and generalized Burgers-Huxley. For the latter two equations ...

    • Extension of a factorization method of nonlinear second order ODE´s with variable coefficients 

      Rosu Barbus, Haret-Codratian; Cornejo Pérez, Octavio; Pérez Maldonado, Maximino (2017)
      "The factorization of nonlinear second-order differential equations proposed by Rosu and Cornejo-Pérez in 2005 is extended to equations containing quadratic and cubic forms in the first derivative. A few illustrative ...

    • Traveling kinks in cubic nonlinear Ginzburg-Landau equations 

      Rosu Barbus, Haret-Codratian; Cornejo Pérez, Octavio; Ojeda May, Pedro Armando (2012)
      "Nonlinear cubic Euler-Lagrange equations of motion in the traveling variable are usually derived from Ginzburg-Landau free energy functionals frequently encountered in several fields of physics. Many authors considered ...

    • Nonlinear software sensor for monitoring genetic regulation processes with noise and modeling errors 

      Ibarra Junquera, Vrani; Torres González, Luis Adolfo; Rosu Barbus, Haret-Codratian; Argüello Astorga, Gerardo Rafael (2005)
      "Nonlinear control techniques by means of a software sensor that are commonly used in chemical engineering could be also applied to genetic regulation processes. We provide here a realistic formulation of this procedure ...

    • Ramanujan sums for signal processing of low-frequency noise 

      Planat, Michel; Rosu Barbus, Haret-Codratian; Perrine, Serge (2002)
      "An aperiodic (low-frequency) spectrum may originate from the error term in the mean value of an arithmetical function such as Mobius function or Mangoldt function, which are coding sequences for prime numbers. In the ...

    • Supersymmetric pairing of kinks for polynomial nonlinearities 

      Rosu Barbus, Haret-Codratian; Cornejo Pérez, Octavio (2005)
      "We show how one can obtain kink solutions of ordinary differential equations with polynomial nonlinearities by an efficient factorization procedure directly related to the factorization of their nonlinear polynomial part. ...

    • Genetic algorithm optimization of entanglement 

      Navarro Muñoz, Jorge Carlos; Rosu Barbus, Haret-Codratian; López Sandoval, Román (2006)
      "We present an application of a genetic algorithmic computational method to the optimization of the concurrence measure of entanglement for the cases of one dimensional chains, as well as square and triangular lattices in ...

    • Existence of periodic orbits in nonlinear oscillators of Emden-Fowler form 

      Mancas, Stefan C; Rosu Barbus, Haret-Codratian (2016)
      "The nonlinear pseudo-oscillator recently tackled by Gadella and Lara is mapped to an Emden-Fowler (EF) equation that is written as an autonomous two-dimensional ODE system for which we provide the phase-space analysis and ...