Browsing Publicaciones Científicas Nanociencias y Materiales by Author "American Institute of Physics"
Now showing items 21-34 of 34
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Magnetic entropy table-like shape in RNi2 composites for cryogenic refrigeration
Ibarra Gaytán, Pablo Jesús; Sánchez Llamazares, José Luis; Álvarez Alonso, Pablo; Sánchez Valdés, Cesar Fidel; Gorria, Pedro; Blanco Rodríguez, Jesús Angel (2015-05)"We have investigated the magnetocaloric (MC) effect in a two-phase composite based on melt-spun ribbons of the intermetallic DyNi2 and TbNi2 Laves phases. The temperature dependence of the isothermal magnetic entropy ... -
Magnetocaloric effect in the low hysteresis Ni-Mn-In metamagnetic shape-memory Heusler alloy
Castillo Villa, Pedro Osmany; Mañosa, Lluis; Frontera, Carlos; Majumdar, Subham; Planes, Antoni (2014-05)"We have studied magnetocaloric properties of a Ni-Mn-In metamagnetic shape-memory alloy especially designed in order to display low thermal hysteresis. Magnetization and calorimetric measurements under a magnetic field ... -
Magnetocaloric properties of rapidly solidified Dy3Co alloy ribbons
Sánchez Llamazares, José Luis; Flores Zúñiga, Horacio; Álvarez Alonso, Pablo; Sánchez Valdés, Cesar Fidel; Lara Rodríguez, Gabriel Ángel; Fernández-Gubieda Ruiz, María Luisa (2015-05)"The magnetic and magnetocaloric (MC) properties of melt-spun ribbons of the Dy3Co intermetallic compound were investigated. Samples were fabricated in an Ar environment using a homemade melt spinner system at a linear ... -
Magnetostructural transition and magnetocaloric effect in MnNiGe1.05 melt-spun ribbons
Daniel Pérez, Gerardo; Sánchez Llamazares, José Luis; Quintana Nedelcos, Aris; Álvarez Alonso, Pablo; Chernenko, Volodymyr (2014-05)"Alloy ribbons of nominal composition MnNiGe1.05 were produced using the melt-spinning technique. As-quenched (aq) polycrystalline ribbons are single-phase showing the hexagonal Ni2In-type crystal structure. After thermal ... -
Microstructure and magnetocaloric effect of melt-spun Ni52Mn26Ga22 ribbon
Li, Zongbin; Sánchez Llamazares, José Luis; Sánchez Valdés, Cesar Fidel; Zhang, Yudong; Esling, Claude; Zhao, Xiang; Zuo, Liang (2012-04)"Microstructural features and magnetocaloric properties of Ni52Mn26Ga22 melt-spun ribbons were studied. Results show that there are four types of differently oriented variants of seven-layered modulated (7M) martensite at ... -
Nonlinear optical absorption and reflection of single wall carbon nanotube thin films by ZZ-scan technique
Terrones Maldonado, Mauricio (2008-02)"Both the nonlinear optical transmission and reflection characteristics of HiPco-based single wall carbon nanotube (SWNT) thin films are studied by using the ZZ-scan method with femtosecond laser pulses at a wavelength of ... -
On the broadening of the magnetic entropy change due to Curie temperature distribution
Álvarez Alonso, Pablo; Sánchez Llamazares, José Luis; Sánchez Valdés, Cesar Fidel; Cuello, Gabriel J.; Franco, Victorino; Gorria, Pedro; Blanco Rodríguez, Jesús Angel (2014-05)"We have studied the correlation between the broadening of the isothermal magnetic entropy change and the Curie temperature (T-C) distribution in nanostructured Pr2Fe17 and Nd2Fe17 alloys produced by high-energy ball-milling ... -
Platinum nanoclusters in silica: Photoluminescent properties and their application for enhancing the emission of silicon nanocrystals in an integrated configuration
Bornacelli, J.; Silva Pereyra, Héctor Gabriel; Rodríguez Fernández, Luis; Ávalos Borja, Miguel; Oliver G., Alicia (2016-09)"We studied photoluminescence of ion implanted platinum nanoclusters embedded in silica. Pt ions were implanted at 2 MeV and the Pt nanoclusters were then nucleated by thermal treatment under either argon, air, or a reducing ... -
Refrigerant capacity of austenite in as-quenched and annealed Ni51.1Mn31.2In17.7 melt spun ribbons
Sánchez Llamazares, José Luis; Flores Zúñiga, Horacio; Sánchez Valdés, Cesar Fidel; Ross, Caroline A.; Garcia, Carlos (2012-04)"The thermal dependence of the magnetic entropy change (Delta S-M(T)) and refrigerant capacity (RC) of austenite in as-quenched ribbons of chemical composition Ni51.1Mn31.2In17.7 produced by melt spinning at a high cooling ... -
Self consistent measurement and removal of the dipolar interaction field in magnetic particle assemblies and the determination of their intrinsic switching field distribution
Martínez Huerta, Juan Manuel; De la Torre Medina, Joaquín; Piraux, Luc; Encinas Oropesa, Armando (2012-04)"Using low density arrays of bistable magnetic nanowires as a model dipolar system, it is shown that the dipolar interaction field coefficient can be measured from the remanence curves as well as from other functions of ... -
Shape invariance through Crum transformation
Organista, José Orlando; Nowakowski, Marek; Rosu Barbus, Haret-Codratian (2006)"We show in a rigorous way that Crum´s result regarding the equal eigenvalue spectrum of Sturm-Liouville problems can be obtained iteratively by successive Darboux transformations. Furthermore, it can be shown that all ... -
Strong and stable photoluminescence from the semiconducting inner tubes within double walled carbon nanotubes
Shimamoto, Daisuke; Muramatsu, Hiroyukim; Hayashi, Takuya; Endo, Morinobu; Park, Jin Sung; Saito, Riichiro; Terrones Maldonado, Mauricio; Dresselhaus, Mildred (2009-01)"We examined the optical features of single wall carbon nanotubes (SWNTs) and the inner tubes within double walled carbon nanotubes (DWNTs) having the same (n,m) chirality. The brighter and more stable photoluminescence ... -
Structural and magnetic characterization of the intermartensitic phase transition in NiMnSn Heusler alloy ribbons
Sánchez Llamazares, José Luis; Flores Zúñiga, Horacio; Ríos Jara, David; Sánchez Valdés, Cesar Fidel; García Fernández, T.; Ross, Caroline A.; Garcia, Carlos (2013-05)"Phase transitions and structural and magnetic properties of rapidly solidified Ni50Mn38Sn12 alloy ribbons have been studied. Ribbon samples crystallize as a single-phase, ten-layered modulated (10M) monoclinic martensite ... -
Texture-induced enhancement of the magnetocaloric response in melt-spun DyNi2 ribbons
Ibarra Gaytán, Pablo Jesús; Sánchez Valdés, Cesar Fidel; Sánchez Llamazares, José Luis; Álvarez Alonso, Pablo; Gorria, Pedro; Blanco Rodríguez, Jesús Angel (2013-10)"The magnetocaloric properties of melt-spun ribbons of the Laves phase DyNi2 have been investigated. The as-quenched ribbons crystallize in a single-phase MgCu2-type crystal structure (C15; space group Fd (3) over barm) ...