Transport Properties and Magnetoresistance of La0.8Ca0.13Ag0.07MnO3 Perovskite Manganite Synthesized by Sol-Gel Method

Budhy Kurniawan R., F. Ruli, A. Imaduddin, R. Kamila

Research output: Contribution to journalConference articlepeer-review

Abstract

In this paper, we investigate the transport properties and magnetoresistance effect of La0.8Ca0.13Ag0.07MnO3 perovskite manganite synthesized by sol-gel method. The XRD pattern of the sample shows a rhombohedral perovskite structure with space group R3c. The EDX analysis confirms that the sample contains all expected chemical elements without any additional impurity. The temperature dependence of electrical resistivity was measured using a cryogenic magnetometer. The results show a metal-insulator transition temperature (TM-I ) at 280 K. The resistivity of the sample increases with an increase of temperature below TM-I . Theoretical analyses of the temperature dependence of resistivity suggest that the resistivity due to electron-electron scattering is predominant below TI-M. The resistivity of the sample decreases when applied magnetic field 1 T at a temperature range of 10 K to 300 K. The magnetoresistance of La0.8Ca0.13Ag0.07MnO3 emanates from spin-polarized tunneling process at the grain boundary.

Original languageEnglish
Article number012031
JournalIOP Conference Series: Materials Science and Engineering
Volume367
Issue number1
DOIs
Publication statusPublished - 12 Jun 2018
Event5th International Conference on Advanced Materials Sciences and Technology, ICAMST 2017 - Makassar, Indonesia
Duration: 19 Sep 201720 Sep 2017

Keywords

  • Magnetometer
  • and transport properties
  • manganite
  • perovskite
  • sol-gel method

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