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Akademický článek
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Computer simulations of first-order relaxation processes show that the spatial configurations of the system acquire an invariant shape once the stationary regime is attained. Inspired by them we find that, in any first-order relaxation process, if th
Externí odkaz:
http://arxiv.org/abs/cond-mat/0608170
Autor:
Rivas, J., Mira, J., Rivas-Murias, B., Fondado, A., Dec, J., Kleemann, W., Rodriguez, M. A. Senaris
We report a rather high dependence of the dielectric permittivity on the magnetic field in La2/3Ca1/3MnO3. The variation is maximum at around 270 K, little above the Curie temperature, TC, and it reaches a 30% under only 0.5 T. We attribute this phen
Externí odkaz:
http://arxiv.org/abs/cond-mat/0603660
Starting from a simple definition of stationary regime in first-order relaxation processes, we obtain that experimental results are to be fitted to a power-law when approaching the stationary limit. On the basis of this result we propose a graphical
Externí odkaz:
http://arxiv.org/abs/cond-mat/0504443
Autor:
Moldes-Diz, Yolanda, Eibes, Gemma, Vázquez-Vázquez, Carlos, Fondado, Alfonso, Mira, Jorge, Feijoo, Gumersindo, Lema, Juan M., Moreira, Maria Teresa
Publikováno v:
In Journal of Environmental Chemical Engineering October 2018 6(5):5950-5960
We are reporting the dielectric response of La1.5Sr0.5NiO4, a system that presents a charge-ordered state above room temperature and a rearrangement of its charge-order pattern in the temperature region 160-200 K. A careful analysis of the role of th
Externí odkaz:
http://arxiv.org/abs/cond-mat/0307764
Autor:
Mira, J., Rivadulla, F., Rivas, J., Fondado, A., Caciuffo, R., Carsughi, F., Guidi, T., Goodenough, J. B.
MnAs exhibits a first-order phase transition from a ferromagnetic, high-spin metal NiAs-type hexagonal phase to a paramagnetic, lower-spin insulator MnP-type orthorhombic phase at T_C = 313 K. Here, we report the results of neutron diffraction experi
Externí odkaz:
http://arxiv.org/abs/cond-mat/0201478
Autor:
Igor Aginako, Aitor Ballesteros, Xabier Barreiro, Cristina Cinos, Eneko Díaz, Ander Egia, Juan Ramón Egia, Luki Fondado, Iñaki Garmendia, Antonio González, Diego Hijosa, Urko Ibáñez, Iñigo Iriarte, Francisco Martínez, Jesús Mari Molledo, Iker Novoa, Juan Manuel Pérez de Ana, Julio Ruiz Gorka Vacas, Santiago Vallejo, Ernesto Vega
Publikováno v:
Munibe Ciencias Naturales, Vol 68 (2020)
La distribución del picamaderos negro en la península Ibérica ha experimentado recientemente una expansión que ha dado lugar a la coalescencia de sus poblaciones cantábrica y pirenaica. El presente estudio analiza la distribución de la especie
Externí odkaz:
https://doaj.org/article/34359a1d49414ece9ead2a24cb321379
Akademický článek
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Publikováno v:
Boletín de la Sociedad Española de Cerámica y Vidrio, Vol 45, Iss 3, Pp 163-168 (2006)
In this work the dielectric behavior of semiconducting La-manganites in an intermediate Ca-doping regime is studied. Ceramic samples were prepared by conventional solid-state reaction, using elemental oxides as starting reactants. A chemical, structu
Externí odkaz:
https://doaj.org/article/8268333ccd1e4bc6ae5aea80f57146de