Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Defect induced ferromagnetism in h-BaTiO3 synthesized from t-BaTiO3 by microwave heating

Authors
Rajavaram, RamaraghavuluPark, JunwooLee, Joonho
Issue Date
25-7월-2017
Publisher
ELSEVIER SCIENCE SA
Keywords
Microwave processing; Magnetic properties; Rietveld refinement; BaTiO3
Citation
JOURNAL OF ALLOYS AND COMPOUNDS, v.712, pp.627 - 632
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF ALLOYS AND COMPOUNDS
Volume
712
Start Page
627
End Page
632
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/82792
DOI
10.1016/j.jallcom.2017.04.150
ISSN
0925-8388
Abstract
Structure modification of tetragonal BaTiO3 (t-BaTiO3) and corresponding phase transition by microwave heating were investigated. The sample compound was heated by 1.8 kW power and 2.45 GHz frequency microwave irradiation under N-2 atmosphere in a short experimental duration of 14 min. The maximum temperature of the surface of the sample was 1115 degrees C. The structure of the microwave irradiated BaTiO3 was then analyzed by employing X-ray diffraction (XRD), Rietveld refinement analysis, Raman spectroscopy, and field emission scanning electron microscopy techniques. From XRD and Rietveld refinement analysis, the microwave irradiated BaTiO3 sample was composed of hexagonal 89%, cubic 5% and tetragonal 6%. Due to the direct internal heating mechanism of microwaves, the core temperature of the sample might be higher than the phase transition temperature. The magnetic behavior of the sample was investigated using a vibrating sample magnetometer. The results indicated that the microwave irradiated BaTiO3 exhibited mixed magnetism: ferromagnetic nature at low applied magnetic fields and diamagnetic nature at high applied magnetic fields. (C) 2017 Elsevier B.V. All rights reserved.
Files in This Item
There are no files associated with this item.
Appears in
Collections
College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher LEE, Joon ho photo

LEE, Joon ho
공과대학 (신소재공학부)
Read more

Altmetrics

Total Views & Downloads

BROWSE