Journal of Advanced Research in Applied Sciences and Engineering Technology 29, Issue 3 (2023) 87-96 87 Journal of Advanced Research in Applied Sciences and Engineering Technology Journal homepage: https://semarakilmu.com.my/journals/index.php/applied_sciences_eng_tech/index ISSN: 2462-1943 The Structural and Magnetic Transition Behaviour Analysis of La 0.7 Pb 0.3 MnO 3 Perovskite-Type Manganites Muhammad Afiq Ikhwan Zainuddin 1 , Adlin Abdul Rahim 1 , Zakiah Mohamed 1,* 1 Faculty of Applied Science, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia ARTICLE INFO ABSTRACT Article history: Received 22 December 2022 Received in revised form 12 January 2023 Accepted 26 January 2023 Available online 7 February 2023 The perovskite structure of La0.7Pb0.3MnO3 has been investigated. The sample has been prepared using the solid-state method. The structural analysis of the sample was carried out by using X-ray diffraction (XRD). The Rietveld refinement technique was applied to refine and determine the structural parameters of the sample. The XRD analysis shows that the compound exhibits a single phase and is crystalized in a rhombohedral structure with a space group of R-3c. The tolerance factor of the sample was calculated to determine the stability of the structure. The visualisation of the sample structure using VESTA software indicates the formation of the MnO6 octahedral structure. The FTIR revealed the absorption band of the sample is around 496 cm -1 , corresponding with the stretching vibration of the Mn-O bond. The AC susceptibility and Vibrating-sample Magnetometer (VSM) were done to study the magnetic properties of the sample and confirm the transition from ferromagnetic (FM) to paramagnetic (PM) at 298K with a maximum value of magnetization of 37.77 emu/g. Keywords: X-Ray diffraction; Rietveld refinement; Crystal structure; Magnetic properties 1. Introduction Perovskite-type manganites present a composition of R1−xAxMnO3, where R denotes trivalent lanthanoid metal ions (La 3+ , Pr 3+ and Nd 3+ ) and A denotes divalent alkaline metal ions (Ca, Sr, Ba and Pb); this compound has attracted considerable research attention worldwide because it displays important properties, such as transformation of structure, metal –insulator (MI) transition, charge ordering, ferroelectricity and colossal magnetoresistance (CMR) phenomena [1, 2]. The compound can be regarded as high value from a technological perspective because of its magnetic and electrical properties. An important feature of perovskite manganite is its substitution ability with other elements when compared with other types of oxides [2]. A previous study showed that the inorganic perovskite of LaMnO3 displays antiferromagnetic (AFM) insulating transition behaviour with a slightly low Nѐel temperature (TN = 140 K) [3]. The presence of Mn 4+ ions exhibit a significant correlation with the LaMnO3 structure and magnetic properties. The Mn 3+ /Mn 4+ ratio alters due to the substitution at the A-site, which also endorses * Corresponding author. E-mail address: zakiah626@uitm.edu.my https://doi.org/10.37934/araset.29.9.8796