Effects of aging on the electrical resistivity of La1-xBxCoO3 perovskites (B = Sr, Ca, Ba; 0.20 ≤ x ≤ 0.30)

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...

Descripción completa

Detalles Bibliográficos
Publicado: 2000
Materias:
Aging effects
Magnetoresistance
Oxygen stoichiometry
Perovskites
Aging of materials
Electric conductivity of solids
Ferromagnetism
Lanthanum compounds
Magnetic relaxation
Paramagnetism
Perovskite
Phase transitions
Stoichiometry
Synthesis (chemical)
Thermal effects
Magnetoresistive sensors
Reentrant semiconducting behavior
Sensors
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09244247_v81_n1-3_p23_Mira
http://hdl.handle.net/20.500.12110/paper_09244247_v81_n1-3_p23_Mira
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_09244247_v81_n1-3_p23_Mira
record_format dspace
spelling paper:paper_09244247_v81_n1-3_p23_Mira2023-06-08T15:51:05Z Effects of aging on the electrical resistivity of La1-xBxCoO3 perovskites (B = Sr, Ca, Ba; 0.20 ≤ x ≤ 0.30) 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 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. 2000 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09244247_v81_n1-3_p23_Mira http://hdl.handle.net/20.500.12110/paper_09244247_v81_n1-3_p23_Mira
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic 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
spellingShingle 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
Effects of aging on the electrical resistivity of La1-xBxCoO3 perovskites (B = Sr, Ca, Ba; 0.20 ≤ x ≤ 0.30)
topic_facet 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
description 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.
title Effects of aging on the electrical resistivity of La1-xBxCoO3 perovskites (B = Sr, Ca, Ba; 0.20 ≤ x ≤ 0.30)
title_short Effects of aging on the electrical resistivity of La1-xBxCoO3 perovskites (B = Sr, Ca, Ba; 0.20 ≤ x ≤ 0.30)
title_full Effects of aging on the electrical resistivity of La1-xBxCoO3 perovskites (B = Sr, Ca, Ba; 0.20 ≤ x ≤ 0.30)
title_fullStr Effects of aging on the electrical resistivity of La1-xBxCoO3 perovskites (B = Sr, Ca, Ba; 0.20 ≤ x ≤ 0.30)
title_full_unstemmed Effects of aging on the electrical resistivity of La1-xBxCoO3 perovskites (B = Sr, Ca, Ba; 0.20 ≤ x ≤ 0.30)
title_sort effects of aging on the electrical resistivity of la1-xbxcoo3 perovskites (b = sr, ca, ba; 0.20 ≤ x ≤ 0.30)
publishDate 2000
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09244247_v81_n1-3_p23_Mira
http://hdl.handle.net/20.500.12110/paper_09244247_v81_n1-3_p23_Mira
_version_ 1768543283507625984

Ejemplares similares