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Mostrando ítems 331-340 de 557
Artículo
The cluster model: A simulation of the aerogel structure as a hierarchically-ordered arrangement of randomly packed spheres
(Springer Nature, 2005)
A new structural model based on the premises widely used for describing the structure of aerogels has been introduced. These structures have been described as an assemblage of randomly-packed spheres in several ...
Artículo
Enhanced cryogenic magnetocaloric effect in Eu8Ga16Ge30 clathrate nanocrystals
(AIP Publishing, 2015)
We observe an enhanced magnetic entropy change ( D S M ) at cryogenic temperatures (T < 20 K) in Eu 8 Ga 16 Ge 30 clathrate (type-I) nanocrystals prepared by a ball milling method. With reduction in the ...
Artículo
Field dependence of the adiabatic temperature change in second order phase transition materials: Application to Gd
(AIP Publishing, 2009-11-19)
The field dependence of the adiabatic temperature change LlTad of second order phase transition materials is studied, both theoretically and experimentally. Using scaling laws, it is demonstrated that, at the Curie ...
Artículo
Partial substitution of Co and Ge for Fe and B in Fe-Zr-B-Cu alloys: microstructure and soft magnetic applicability at high temperature
(Elsevier, 2005)
The partial substitutions of Co for Fe and Ge for B are studied for a Fe83-xCoxZr6B10-yGeyCu1 alloy series (x = 0, 5 and 20; y = 0 and 5) as a possible way to enhance the high temperature applicability of NANOPERM alloys. ...
Artículo
Latitudinal Trends in Human Primary Activities: Characterizing the Winter Day as a Synchronizer
(Scientific Reports, 2018-03-28)
This work analyzes time use surveys from 19 countries (17 European and 2 American) in the middle latitude (38–61 degree) accounting for 45% of world population in this range. Time marks for primary activities are contrasted ...
Artículo
Effect of catalytic graphitization on the electrochemical behavior of wood derived carbons for use in supercapacitors
(Elsevier, 2015)
Porous graphitic carbons were successfully obtained from wood precursors through pyrolysis using a transition metal as catalyst. Once the catalyst is removed, the resulting material mimics the microstructure of the wood ...
Artículo
Benzyltrimethylammonium dihydrogen orthophosphate monohydrate
(International Union of Crystallography, 2005)
The title compound, C 10 H 16 N + H 2 PO 4 H 2 O, crystallizes in the centrosymmetric space group P 2 1 / c with two independent molecules in the asymmetric unit. Therefore, nonlinear ...
Artículo
First- and second-order phase transitions in RE6Co2Ga (RE = Ho, Dy or Gd) cryogenic magnetocaloric materials
(Science in China Press, 2021)
Rare-earth (RE) rich intermetallics crystallizing in orthorhombic Ho6Co2Ga-type crystal structure exhibit peculiar magnetic properties that are not widely reported for their magnetic ordering, order of magnetic phase ...
Artículo
Fluage de monocristaux de NiO
(European Physical Society (EPS), 1978)
NiO single crystals have been subjected to constant-load compressive creep along (100). Stresses between 50 MPa and 120 MPa and temperatures between 950 °C and 1 200 °C were studied. The activation energy observed suggests ...
Artículo
Structural, Vibrational, and Magnetic Characterization of Orthoferrite LaFeO3 Ceramic Prepared by Reaction Flash Sintering
(Multidisciplinary Digital Publishing Institute (MDPI), 2023)
LaFeO3 perovskite ceramics have been prepared via reaction flash technique using Fe2O3 and La2O3 as precursors. The obtained pellets have been investigated using several techniques. The formation of LaFeO3 has been clearly ...