Investigation of the magnetocaloric effect and the electrical properties of La0.8Ba0.1Ca0.1Mn0.85Co0.15O3 oxide manganite. (April 2017)

• Record Type: Journal Article
• Authors: Gdaiem, Mohamed Amara; Dhahri, Ah.; Dhahri, J.; Hlil, E.K.
• Is Part Of: Materials research bulletin. Volume 88(2017)
• Page Start: 91
• Page End: 97
• Publication Date: 2017-04
• Subjects: Oxides -- Sol-gel chemistry -- X-ray diffraction -- Magnetic properties -- Electrical properties; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2016.11.035
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: The sample crystallizes in Pbnm orthorhombic symmetry. The variation of (M) versus (T) reveals a (FM) to (PM) phase transition around TC . Magnetocaloric effect of La0.8 Ba0.1 Ca0.1 Mn0.85 Co0.15 O3 was investigated. The sample has a semiconductor behavior in the whole temperature range. Abstract: The La0.8 Ba0.1 Ca0.1 Mn0.85 Co0.15 O3 sample was prepared by polymerization complex sol-gel method. The structural, magnetocaloric and electrical properties were studied. The sample crystallizes in the orthorhombic structure with Pbnm space group. In addition to the experimental study, theoretical approaches were adopted to investigate the magnetocaloric and electrical behavior of this sample. The important parameters such as maximum entropy change, full width at half maximum ( δ FWHM ) and relative cooling power (RCP) were explained qualitatively. The analysis of electrical resistivity data shows the semiconductor behavior in all temperatures, which can be explained by small polaron hopping (SPH) and Mott's variable range hopping (VRH) models.