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Mira, J.; Rivas, J.; Breijo, M.P.; Señarís Rodríguez, M.A.; Sánchez, R.D. "Effects of aging on the electrical resistivity of La1-xBxCoO3 perovskites (B = Sr, Ca, Ba; 0.20 ≤ x ≤ 0.30)" (2000) The 2nd European Magnetic Sensors and Actuators Conference (EMSA '98). 81(1-3):23-26
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Abstract:

A study of the reliability of the title compounds as a basis for magnetoresistive sensors is presented. For this purpose we have carried out long-term systematic studies of the evolution of the resistive and magnetic properties of samples synthesized by both ceramic and wet chemical routes, allowing them to age during several months. It is observed that, although the magnetic properties remain unaltered, their resistivity does change appreciably. With time, samples that are initially metallic over all the measured temperature range (T < 300 K), change to semiconductor-like behaviour at low temperatures and above their ferromagnetic to paramagnetic phase transition temperature, giving rise to a 'reentrant semiconducting behaviour' with associated high electrical noise, relaxation effects of the resistivity and even diodic behaviour. © 2000 Elsevier Science S.A. All rights reserved.

Registro:

Documento: Artículo
Título:Effects of aging on the electrical resistivity of La1-xBxCoO3 perovskites (B = Sr, Ca, Ba; 0.20 ≤ x ≤ 0.30)
Autor:Mira, J.; Rivas, J.; Breijo, M.P.; Señarís Rodríguez, M.A.; Sánchez, R.D.
Ciudad:Sheffield
Filiación:Departamento de Física Aplicada, Universidade de Santiago de Compostela, E-15706 Santiago de Compostela, Spain
Departamento de Química Fundamental e Industrial, Universidade da Coruña, E-15071 A Coruña, Spain
Departamento de Física, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Palabras clave:Aging effects; Magnetoresistance; Oxygen stoichiometry; Perovskites; Aging of materials; Electric conductivity of solids; Ferromagnetism; Lanthanum compounds; Magnetic relaxation; Magnetoresistance; Paramagnetism; Perovskite; Phase transitions; Stoichiometry; Synthesis (chemical); Thermal effects; Magnetoresistive sensors; Reentrant semiconducting behavior; Sensors
Año:2000
Volumen:81
Número:1-3
Página de inicio:23
Página de fin:26
DOI: http://dx.doi.org/10.1016/S0924-4247(99)00164-8
Título revista:The 2nd European Magnetic Sensors and Actuators Conference (EMSA '98)
Título revista abreviado:Sens Actuators A Phys
ISSN:09244247
CODEN:SAAPE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09244247_v81_n1-3_p23_Mira

Referencias:

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Citas:

---------- APA ----------
Mira, J., Rivas, J., Breijo, M.P., Señarís Rodríguez, M.A. & Sánchez, R.D. (2000) . Effects of aging on the electrical resistivity of La1-xBxCoO3 perovskites (B = Sr, Ca, Ba; 0.20 ≤ x ≤ 0.30). The 2nd European Magnetic Sensors and Actuators Conference (EMSA '98), 81(1-3), 23-26.
http://dx.doi.org/10.1016/S0924-4247(99)00164-8
---------- CHICAGO ----------
Mira, J., Rivas, J., Breijo, M.P., Señarís Rodríguez, M.A., Sánchez, R.D. "Effects of aging on the electrical resistivity of La1-xBxCoO3 perovskites (B = Sr, Ca, Ba; 0.20 ≤ x ≤ 0.30)" . The 2nd European Magnetic Sensors and Actuators Conference (EMSA '98) 81, no. 1-3 (2000) : 23-26.
http://dx.doi.org/10.1016/S0924-4247(99)00164-8
---------- MLA ----------
Mira, J., Rivas, J., Breijo, M.P., Señarís Rodríguez, M.A., Sánchez, R.D. "Effects of aging on the electrical resistivity of La1-xBxCoO3 perovskites (B = Sr, Ca, Ba; 0.20 ≤ x ≤ 0.30)" . The 2nd European Magnetic Sensors and Actuators Conference (EMSA '98), vol. 81, no. 1-3, 2000, pp. 23-26.
http://dx.doi.org/10.1016/S0924-4247(99)00164-8
---------- VANCOUVER ----------
Mira, J., Rivas, J., Breijo, M.P., Señarís Rodríguez, M.A., Sánchez, R.D. Effects of aging on the electrical resistivity of La1-xBxCoO3 perovskites (B = Sr, Ca, Ba; 0.20 ≤ x ≤ 0.30). Sens Actuators A Phys. 2000;81(1-3):23-26.
http://dx.doi.org/10.1016/S0924-4247(99)00164-8