Structure, Morphology, Electrical Transport, and Magnetoresistance Properties of La0.7Ba0.1Sr0.2Mn0.9Cu0.1O3

9th Annual Basic Science International Conference 2019

自然科学（总论）

Kurniawan, Budhy^1 ; Imaddudin, Agung^2 ; Komala, Tesya^1 ; Faruq, Umar^1 ; Nur, Alfin Naufal^1 ; Bisma, Bathara^1 ; Razaq, Dhawud Sabilur^1 ; Munazat, Dicky Rezky^1

Department of Physics, Universitas Indonesia, Depok

16424, Indonesia^1

Research Center for Metallurgy and Materials, Indonesian Institute of Sciences (LIPI), Gedung 470, Puspiptek, South Tangerang, Banten

15314, Indonesia^2

关键词: Electrical transport;    External magnetic field;    Magnetoresistance properties;    Magnon scattering;    Resistivity measurement;    Rhombohedral structures;    Semiconductor behaviours;    Structural investigation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/546/4/042017/pdf
DOI  :  10.1088/1757-899X/546/4/042017

学科分类：自然科学（综合）

来源: IOP

【 摘 要 】

The structure, morphology, electrical transport and magnetoresistance properties of La0.7Ba0.1Sr0.2Mn0.9Cu0.1O3 has been investigated. The sample has been successfully prepared using sol-gel method. Structural investigation using X-ray diffraction (XRD) shows that the sample crystallizes in rhombohedral structure with R3c space group. The surface morphology of the sample shows that the sample consists of irregular polygonal grain. Furthermore, resistivity measurement shows that the sample undergoes a transition from metal to semiconductor behaviour upon heating. The electrical properties of the sample follow the electron-phonon-magnon scattering theory. Under the influence of the external magnetic field, the sample shows that up to 8% of the resistivity decreased at 200 K.