Saturday, October 25, 2014

 

 



Soy un nuevo usuario

Olvidé mi contraseña

Entrada usuarios

Lógica Matemáticas Astronomía y Astrofísica Física Química Ciencias de la Vida
Ciencias de la Tierra y Espacio Ciencias Agrarias Ciencias Médicas Ciencias Tecnológicas Antropología Demografía
Ciencias Económicas Geografía Historia Ciencias Jurídicas y Derecho Lingüística Pedagogía
Ciencia Política Psicología Artes y Letras Sociología Ética Filosofía


Emergence of glassy-like dynamics in an orientationally ordered phase

1) La descarga del recurso depende de la página de origen
2) Para poder descargar el recurso, es necesario ser usuario
    registrado en Universia


  Descargar recurso

Detalles del recurso

Pertenece a: UPCommons - E-prints UPC Universitat Politècnica de Catalunya   

Descripción: The dynamics of a simple rigid pseudoglobular molecule (2-adamantanone) has been studied by means of dielectric spectroscopy and examined under the constraints imposed by the space group of the crystal structure determined by x-ray powder diffraction. The low-temperature monoclinic structure of 2-adamantanone, with one molecule per asymmetric unit (Z'= 1), displays a statistical intrinsic disorder, concerning the site occupancy of the oxygen atom along three different sites. Such a physically identifiable disorder gives rise to large-angle molecular rotations which inherently lead to time-average fluctuations of the molecular dipole, thus contributing to the dielectric susceptibility. The dielectric spectra for the low-temperature “ordered” phase displays a universal feature of glassy-like materials, i.e., coexistence of α- and β-relaxation processes. The former is clearly identified with the strongly restricted reorientational motions within the long-range “ordered” crystalline lattice. The latter, never observed before in fully translationally and highly orientationally ordered phases, displays all the properties of an original Johari-Goldstein β-relaxation, in spite of the strong character of this glass-like phase. These findings can be explained according to the coupling model, applied to such “ordered” phases.

Autor(es): Romanini, Michela -  Negrier, Philippe -  Tamarit Mur, José Luis -  Capaccioli, Simon -  Barrio Casado, María del -  Pardo Soto, Luis Carlos -  Mondieig, Denise - 

Id.: 55226407

Idioma: English  - 

Versión: 1.0

Estado: Final

Tipo:  0 p. - 

Palabras claveÀrees temàtiques de la UPC -  Enginyeria dels materials - 

Tipo de recurso: Article  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: Open Access

Formatos:  0 p. - 

Requerimientos técnicos:  Browser: Any - 

Relación: [References] http://link.aps.org/doi/10.1103/PhysRevB.85.134201

Fecha de contribución: 05-may-2013

Contacto:

Localización:
* Romanini, M. [et al.]. Emergence of glassy-like dynamics in an orientationally ordered phase. "Physical review B: condensed matter and materials physics", 04 Abril 2012, vol. 85, núm. 13, p. 134201-1-134201-7.
* 1098-0121
* 10.1103/PhysRevB.85.134201


Otros recursos del mismo autor(es)

  1. Hopping conductivity and polarization effects in a fullerene derivative salt Impedance spectroscopy is employed to probe the frequency-dependent conductivity and dielectric resp...
  2. Barocaloric and magnetocaloric effects in Fe49Rh51 We report on calorimetry under applied hydrostatic pressure and magnetic field at the antiferromagne...
  3. On the polymorphism of l -citrulline: Crystal structure and characterization of the orthorhombic d form Solid-state properties of active pharmaceutical compounds are closely related to their dissolution b...
  4. Barocaloric and magnetocaloric effects in Fe49Rh51 We report on calorimetry under applied hydrostatic pressure and magnetic field at the antiferromagne...
  5. On the polymorphism of l -citrulline: Crystal structure and characterization of the orthorhombic d form Solid-state properties of active pharmaceutical compounds are closely related to their dissolution b...

Otros recursos de la misma colección

  1. Multidimensional blocking in UPC Partitioned Global Address Space (PGAS) languages offer an attractive, high-productivity programming...
  2. Optimum CSPR evaluation of heterodyne envelope receivers in OFDM-PONs A heterodyne envelope (HE) receiver (RX) is investigated in the context of orthogonal frequency divi...
  3. Direct phase modulation of a DFB laser for udWDM-PON The response of a DFB was equalized with a simple RC network for modulating directly its phase and p...
  4. First-person locomotion in 3D virtual environments: a usability analysis 3D Virtual Environments (VE) are becoming popular as a tool for cognitive, functional and psychologi...
  5. Past, present, and future of podcasting in higher education Postprint (published version)

Valoración de los usuarios

No hay ninguna valoración para este recurso.Sea el primero en valorar este recurso.
 

Busque un recurso