Buscar
Mostrando ítems 1-10 de 11
The s - d exchange model as the underlying mechanism of magnetoresistance in ZnO doped with alkali metals
(IOP Publishing, 2019-08)
High field magnetoresistance has been studied in epitaxial n-type ZnO:Na and ZnO:Li thin films in a temperature range between 4 K and 150 K. The resulting negative magnetoresistance can be well fitted using a semiempirical ...
Magnetocrystalline interactions and oxidation state determination of Mn(2-x)V(1+x)O4 (x=0, 1/3 and 1) magnetorresistive spinel family
(Elsevier B.V., 2013-09-01)
Oxidation states of transition metal cations in spinels-type oxides are sometimes extremely difficult to determine by conventional spectroscopic methods. One of the most complex cases occurs when there are different cations, ...
Magnetocrystalline interactions and oxidation state determination of Mn(2−x)V(1+x)O4 (x=0, 1/3 and 1) magnetorresistive spinel family
(Elsevier Inc, 2013-07)
Oxidation states of transition metal cations in spinels-type oxides are sometimes extremely difficult to determine by conventional spectroscopic methods. One of the most complex cases occurs when there are different cations, ...
Exchange bias em multicamadas de NiFe/IrMn/Ta: um estudo através da magnetorresistência anisotrópica
(Universidade Federal de Santa MariaBRFísicaUFSMPrograma de Pós-Graduação em Física, 2015-08-07)
In this work a study of the exchange interaction between ferromagnetic (NiFe) and antiferromagnetic
(IrMn) layers was done through structural, magnetic and electric characterization.
NiFe/IrMn/Ta films were grown with ...
Estudo do exchange bias em filmes finos de NiFe/FeMn (bicamadas) e NiFe/IrMn (multicamadas)
(Universidade Federal de Santa MariaBRFísicaUFSMPrograma de Pós-Graduação em Física, 2016-03-23)
The Exchange Bias (EB) phenomenon consists of an interfacial exchange coupling between a ferromagnetic (FM) material and an antiferromagnetic (AFM) one and has as the main characteristics the rise of a unidirectional ...
Control adaptativo para optimizar una intersección semafórica basado en un sistema embebidoAdaptive Control for Optimizing a Traffic Light Intersection Based on an Embedded System
(Ingeniería y cienciaColombia, 2016-11-22)
In order to optimize the traffic flow on a road intersection, an adaptive control algorithm and a data base were designed; both components were hosted on a Raspberry Pi B+ embedded system. The data base helps to debug the ...
Control adaptativo para optimizar una intersección semafórica basado en un sistema embebidoAdaptive Control for Optimizing a Traffic Light Intersection Based on an Embedded System
(Ingeniería y cienciaColombia, 2016-11-22)
In order to optimize the traffic flow on a road intersection, an adaptive control algorithm and a data base were designed; both components were hosted on a Raspberry Pi B+ embedded system. The data base helps to debug the ...