Microstructure, Magnetic and Electrical Transport Properties of Sol-Gel Synthesized La0.7Sr0.2Ca0.1MnO3:TiO2 Composite

Zulkarnain, Budhy Kurniawan, Agung Imaduddin, Heri Nugraha, Dicky Rezky Munazat

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


Electrical transport in materials have been studied extensively due to its great potential in spintronic technology. The introduction of the secondary phase into the manganite matrix can modify the electrical properties, subsequently improving the low-field magnetic resistance (LFMR). In this work, we study the change in electrical properties at different temperatures of polycrystalline (1-x)La0.7Sr0.2Ca0.1MnO3/xTiO2 (LT) composites where x = 0, 0.05 and 0.1. Polycrystalline La0.7Sr0.2Ca0.1MnO3 (LSCMO) was synthesized by sol-gel method, calcined at 700 °C, and pre-sintered at 800 °C for 6 h before adding TiO2. TiO2 as filler was mixed with LSCMO by wet mixing and stirring for about 30 min until a homogeneous compound was formed. Composite LT was then inserted to oven up to 100 o C for 2h to remove the moisture, compacted at 10 MPa, and sintered at 1200o C for 12 h. All samples in the LSCMO phase have a rhombohedral crystal structure with space group R3c. The crystal structure parameters were studied using Rietveld refinement through GSAS II software. The sample was characterized by SEM to represent the morphology of the sample. As the TiO2 content increased, the magnetization decreased, as observed by VSM analysis at room temperature. The electrical transport properties of pure LSCMO and LT were characterized by cryogenic from 195K to 255K. The resistivity of LT10 is too high compared to that of LT5 and as the temperature increases, the resistivity in this range will decrease. For 195 K, the resistivity of LSCMO, LT5 and LT10 are 3.09 x 10-2 ohm.cm, 4.40 x 103 ohm.cm and 4.77 x 104 ohm.cm respectively.

Original languageEnglish
Title of host publicationSolid State Phenomena
PublisherTrans Tech Publications Ltd
Number of pages7
Publication statusPublished - 2023

Publication series

NameSolid State Phenomena
ISSN (Print)1012-0394
ISSN (Electronic)1662-9779


  • composite
  • electrical transport
  • Lanthanum manganite
  • sol gel


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