Correo Electrónico
DNINFOA - SIA
Bibliotecas
Convocatorias
Identidad U.N.
Published
MEDIDAS DE EFECTO HALL Y RESISTIVIDAD EN ALEACIONES MAGNÉTICAS AMORFAS BASADAS EN CoFe
HALL EFFECT AND RESISTIVITY MEASUREMENTS IN CoFe-BASED AMORPHOUS MAGNETIC ALLOYS
Keywords:
Cintas de materiales magnéticos amorfos, Conductividad eléctrica. (es)Hall effect instrumentation, amorphous magnetic materials - ribbons, electrical conductivity. (en)
En este trabajo, presentamos el diseño y la automatización de un sistema de medición de efecto Hall de corriente directa (DC) y corriente alterna (AC) usando un método de cuatro puntas. Este sistema consiste en una fuente de corriente directa y alterna (Modelo 6221 CD-CA, Keithley Instruments Inc.) acoplada a un nano-voltímetro (Modelo 2182 A, Keithley Instruments Inc.), y un electroimán (Phylatex) que proporciona campos magnéticos de hasta 0,8 T. Este sistema tiene varias capacidades de medición incluyendo voltaje Hall, coeficiente Hall, resistencia, resistividad y curvas I-V, y puede funcionar en los modos de corriente directa CD y alterna CA (hasta 10 Hz). El funcionamiento del sistema de medición de efecto Hall fue verificado usando una muestra patrón de cobre y varios circuitos de resistencia que corresponden a muestras simuladas de materiales metálicos y semiconductores. Este sistema fue utilizado para estudiar las propiedades de magneto-transporte a temperatura ambiente de las cintas amorfas magnéticas blandas Co64Fe21B15 y Co71Fe4B15Si10. Finalmente, presentamos un análisis de esas propiedades de magneto-transporte.
In this paper, a design and automation of a DC and AC Hall effect measurement system using a four-wire method is presented. This system consists of a Current Source (Model 6221 DC-AC, Keithley Instruments Inc.) connected to a Nanovoltmeter (Model 2182A, Keithley Instruments Inc.), and an electromagnet (Phylatex) that provides magnetic fields up to 0.8 T. This system has several measurement capabilities including Hall voltage, Hall coefficient, resistance, resistivity, and I-V curves, and can be operated in both DC and AC (up to 10 Hz) current modes (IAC, IDC). The functioning of the Hall effect measurement system was verified using both a standard sample of copper and several resistor circuits that correspond to simulated metallic and semiconductor samples. This measurement system was used to study the magneto-transport properties at room temperature of the soft magnetic amorphous ribbons Co64Fe21B15 and Co71Fe4B15Si10. An analysis of these magneto-transport properties is presented, too.
Downloads
License
Those authors who have publications with this journal, accept the following terms:
a. The authors will retain their copyright and will guarantee the publication of the first publication of their work, which will be subject to the Attribution-SinDerivar 4.0 International Creative Commons Attribution License that permits redistribution, commercial or non-commercial, As long as the Work circulates intact and unchanged, where it indicates its author and its first publication in this magazine.
b. Authors are encouraged to disseminate their work through the Internet (eg in institutional telematic files or on their website) before and during the sending process, which can produce interesting exchanges and increase appointments of the published work.
