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...

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Autor principal: Mira, J.
Otros Autores: Rivas, J., Breijo, M.P, Señarís Rodríguez, M.A, Sánchez, R.D
Formato: Acta de conferencia Capítulo de libro
Lenguaje:Inglés
Publicado: Elsevier 2000
Acceso en línea:Registro en Scopus
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008 190411s2000 xx ||||fo|||| 00| 0 eng|d
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030 |a SAAPE 
100 1 |a Mira, J. 
245 1 0 |a Effects of aging on the electrical resistivity of La1-xBxCoO3 perovskites (B = Sr, Ca, Ba; 0.20 ≤ x ≤ 0.30) 
260 |b Elsevier  |c 2000 
270 1 0 |m Mira, J.; Departamento de Física Aplicada, Universidade de Santiago de Compostela, E-15706 Santiago de Compostela, Spain; email: fajmirap@usc.es 
506 |2 openaire  |e Política editorial 
504 |a Baibich, M.N., Giant magnetoresistance of (001)Fe/(001)Cr magnetic superlattices (1988) Phys. Rev. Lett., 61, pp. 2472-2475 
504 |a Von Helmolt, R., Wecker, J., Holzapfel, B., Schultz, L., Samwer, K., Giant negative magnetoresistance in perovskite La2/3Ba1/3MnOx ferromagnetic films (1993) Phys. Rev. Lett., 71, pp. 2331-2333 
504 |a Jin, S., Tiefel, T.H., McCormack, M., Fastnacht, R.R., Ramesh, R., Chen, L.H., Thousandfold change in resistivity in magnetoresistive La-Ca-Mn-O films (1994) Science, 264, pp. 413-415 
504 |a Goodenough, J.B., Theory of the role of covalency in the perovskite-type manganites [La, M(II)]MnO3 (1955) Phys. Rev., 100, pp. 564-573 
504 |a Goodenough, J.B., (1963) Magnetism and the Chemical Bond, pp. 221-238. , Wiley, New York, and references therein 
504 |a Señarís Rodríguez, M.A., Goodenough, J.B., LaCoO3 revisited (1995) J. Solid State Chem., 116, pp. 224-231 
504 |a Mira, J., Rivas, J., Sánchez, R.D., Señarís Rodríguez, M.A., Fiorani, D., Rinaldi, D., Caciuffo, R., AC magnetic susceptibility measurements in La1-xSrxCoO3 (A: ≤ 0.30) (1997) J. Appl. Phys., 81, pp. 5753-5755 
504 |a Señarís Rodríguez, M.A., Goodenough, J.B., Magnetic and transport properties of the system La1-xSrxCoO3 (0 < x ≤ 0.50) (1995) J. Solid State Chem., 118, pp. 323-336 
504 |a Golovanov, V., Mihaly, L., Moodenbaugh, A.R., Magnetoresistance in La1-xSrxCoO3 for 0.05 ≤ x ≤ 0.25 (1996) Phys. Rev. B, 53, pp. 8207-8210 
504 |a Mahendiran, R., Raychaudhuri, A.K., Magnetoresistance of the spin-state compound La1-xSrxCoO3 (1996) Phys. Rev. B, 54, pp. 16044-16052 
504 |a Mahendiran, R., Raychaudhuri, A.K., Chainani, A., Sarma, D.D., Low temperature linear magnetic field sensor based on magnetoresistance of the perovskite oxide La-Sr-Co-O (1995) Rev. Sci. Instrum., 66, pp. 3012-3071 
504 |a Vonsovskii, S.V., (1950) Magnetism, 2. , Ch. 25, Wiley 
504 |a Madhukar, S., Aggarwal, S., Dhote, A.M., Ramesh, R., Krishnan, A., Keeble, D., Poindexter, E., Effect of oxygen stoichiometry on the electrical properties of La0.5Sr0.5CoO3 electrodes (1995) J. Appl. Phys., 81, pp. 3543-3547A4 - 
520 3 |a 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.  |l eng 
593 |a Departamento de Física Aplicada, Universidade de Santiago de Compostela, E-15706 Santiago de Compostela, Spain 
593 |a Departamento de Química Fundamental e Industrial, Universidade da Coruña, E-15071 A Coruña, Spain 
593 |a Departamento de Física, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina 
690 1 0 |a AGING EFFECTS 
690 1 0 |a MAGNETORESISTANCE 
690 1 0 |a OXYGEN STOICHIOMETRY 
690 1 0 |a PEROVSKITES 
690 1 0 |a AGING OF MATERIALS 
690 1 0 |a ELECTRIC CONDUCTIVITY OF SOLIDS 
690 1 0 |a FERROMAGNETISM 
690 1 0 |a LANTHANUM COMPOUNDS 
690 1 0 |a MAGNETIC RELAXATION 
690 1 0 |a MAGNETORESISTANCE 
690 1 0 |a PARAMAGNETISM 
690 1 0 |a PEROVSKITE 
690 1 0 |a PHASE TRANSITIONS 
690 1 0 |a STOICHIOMETRY 
690 1 0 |a SYNTHESIS (CHEMICAL) 
690 1 0 |a THERMAL EFFECTS 
690 1 0 |a MAGNETORESISTIVE SENSORS 
690 1 0 |a REENTRANT SEMICONDUCTING BEHAVIOR 
690 1 0 |a SENSORS 
700 1 |a Rivas, J. 
700 1 |a Breijo, M.P. 
700 1 |a Señarís Rodríguez, M.A. 
700 1 |a Sánchez, R.D. 
711 2 |c Sheffield  |d 13 July 1998 through 15 July 1998  |g Código de la conferencia: 56556 
773 0 |d Elsevier, 2000  |g v. 81  |h pp. 23-26  |k n. 1-3  |p Sens Actuators A Phys  |n Sensors and Actuators, A: Physical  |x 09244247  |w (AR-BaUEN)CENRE-6815  |t The 2nd European Magnetic Sensors and Actuators Conference (EMSA '98) 
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856 4 0 |u https://doi.org/10.1016/S0924-4247(99)00164-8  |y DOI 
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