Effect of Fe Doping on the Structural, Electrical and Magnetic Properties of Perovskite La_0.7Ca_0.3Mn_1-xFe_xO ₃ (X = 0, 0.01, 0.03 and 0.05)

Abstract:

The effect of Fe-substitution at the Mn-site in La_0.7Ca_0.3Mn_1-xFe_xO₃ (x = 0, 0.01, 0.03 and 0.05) on its structure, electrical and magnetic properties has been studied. These properties were investigated via X-ray diffraction (XRD) analysis, temperature-dependent resistance measurements and temperature-dependent AC magnetic susceptibility measurements. XRD analysis showed all samples are single phase materials. Temperature dependent resistance measurements between 30–300 K showed all samples to undergo insulator-metal transition as temperature decreases. Increase in Fe doping for x = 0, 0.01, 0.03 and 0.05 caused the transition temperature T_IM to decrease from 257 K, 244 K, 205 K and 162 K respectively. The magnetic susceptibility measurements showed the samples to exhibit paramagnetic to ferromagnetic transition as temperature decreased. Increase in Fe substitution x at the Mn-site progressively decreased the Curie temperature T_C from 250 K at x = 0 to 170 K at x = 0.05.

• Periodical: Solid State Phenomena (Volume 317)
• Pages: 10-16
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.317.10
• Online since: May 2021
• Authors: Nor Azah Nik-Jaafar*, Roslan Abd-Shukor, Muhammad Aizat Kamarudin
• Keywords: Curie Temperature, Insulator-Metal Transition, Mn-Site, Perovskite-Manganite, Transition Element

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