Prediction of magnetoresistance using a magnetic field and correlation between the magnetic and electrical properties of La0.7Bi0.05Sr0.15Ca0.1Mn1−xInxO3 (0 ≤ x ≤ 0.3) manganite. Issue 49 (14th June 2017)

• Record Type: Journal Article
• Authors: Belkahla, Arwa; Cherif, K.; Dhahri, J.; Taibi, K.; Hlil, E. K.
• Is Part Of: RSC advances. Volume 7:Issue 49(2017)
• Page Start: 30707
• Page End: 30716
• Publication Date: 2017-06-14
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra04256f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : In this paper, we have systematically investigated the effect of In doping on the magnetic and magnetocaloric effect (MCE) in La0.7 Bi0.05 Sr0.15 Ca0.1 Mn1− x In x O3 (0 ≤ x ≤ 0.3) manganite. Abstract : In this paper, we have systematically investigated the effect of In doping on the magnetic and magnetocaloric effect (MCE) in La0.7 Bi0.05 Sr0.15 Ca0.1 Mn1− x In x O3 (0 ≤ x ≤ 0.3) manganite. All of the samples exhibit a second-order magnetic phase transition from the ferromagnetic to the paramagnetic state at the Curie temperature ( T C ). From the measurements of isothermal magnetization around ( T C ), we have determined the magnetic entropy change (Δ S M ). It has been found that there was a large (Δ S M ), i.e. a large (MCE), in all samples. Among them, a maximum (Δ S M ) and the highest relative cooling power (RCP) under the magnetic field of 5 T are found to be 6.14 J kg −1 K −1 and 281 J kg −1, respectively for x = 0. This investigation suggests that our samples would be suitable candidates for magnetic refrigeration technology. The relationship between resistivity and magnetization was performed as ρ = ρ 0 exp(− M / α ). The (MCE) was investigated based on the resistivity measurements. The obtained results were discussed. A typical numerical method (Gauss function) was used for fitting the experimental data of resistivity. The simulation values such as metal–semiconductor transition temperature ( T M–Sc ) and maximum resistivity ( ρ max ), calculated from this function, showed promising agreement with the experimental data. The shifts of these values as a function of magnetic field for all samples have been interpreted.