Investigation of structural and electrical properties of La0.7(Ba1-xCax)0.3MnO3 compounds by sol-gel method

Suci Winarsih, Budhy Kurniawan R., Azwar Manaf, Dwi Nanto, Agung Imaduddin, Hendrik, Sitti Ahmiatri Saptari

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

In this paper, we explored structural and electrical properties of La0.7(Ba1-xCax)0.3MnO3 (x = 0; 0.03; and 0.05) compounds. The general structure of perovskite manganites is AMnO3 (A= trivalent rare earth with divalent ion-doped). Average A-site cation size, external pressure, and the variance of the cation size σ2 are one of many factors that affected to magneto-transport properties of manganites as reported by others. In this work we focus only on the electrical properties in La0.7Ba0.3MnO3 Ca-doped compound which may influence crystal structure resulting resistivity phenomena under magnetic field influence. All samples were synthesized by sol-gel method from which fine powders were obtained. The X-ray powder diffraction pattern of powder materials shows that all samples are fully crystalline with a rhombohedral structure. Rietveld refinement shows that the presence of calcium has changed some crystal structural parameters such lattice parameter, Mn-O bond length, and Mn-O-Mn angles. The electrical resistivity of all synthesized materials investigated by four point probe method using Cryogenic Magnet in the temperature range of 50-300 K under influence a magnetic field shows resistivity temperature dependent. In fact presence of calcium has reduced the resistivity. It might occure because it has made an enhancement in the mobility of hopping electrons. The magnetic external field causes the resistivity decreased for all samples because host spin align by delocalizing the charge carries so electron itinerant through the lattice suggested by other authors. Both calcium dopant concentration and the applied external magnetic field shows strong correlation in reduction of resistivity.

Original languageEnglish
Title of host publication2016 Conference on Fundamental and Applied Science for Advanced Technology, ConFAST 2016
Subtitle of host publicationProceeding of ConFAST 2016 Conference Series: International Conference on Physics and Applied Physics Research, ICPR 2016, International Conference on Industrial Biology , ICIBIO 2016, and International Conference on Information System and Applied Mathematics, ICIAMATH 2016
EditorsRara Sandhy Winanda, Qonitatul Hidayah, Iwan Tri Riyadi Yanto, Nursyiva Irsalinda, Oktira Roka Aji, Damar Yoga Kusuma, Syarifah Inayati
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735414037
DOIs
Publication statusPublished - 17 Jun 2016
Event2016 Conference on Fundamental and Applied Science for Advanced Technology, ConFAST 2016 - Yogyakarta, Indonesia
Duration: 25 Jan 201626 Jan 2016

Publication series

NameAIP Conference Proceedings
Volume1746
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference2016 Conference on Fundamental and Applied Science for Advanced Technology, ConFAST 2016
CountryIndonesia
CityYogyakarta
Period25/01/1626/01/16

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