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Effect of Sintering Temperature on Structural, Dielectric, and Magnetic Properties of Multiferroic YFeO3 Ceramics Fabricated by Spark Plasma Sintering

by Meng Wang 1,†, Ting Wang 1,†, Shenhua Song 1,*, Qing Ma 2,3,* and Renchen Liu 2,3
1
Shenzhen Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China
2
Research Institute of Tsinghua University in Shenzhen, Shenzhen 518055, China
3
Tsinghua Innovation Center in Dongguan, Dongguan 523808, China
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Beatriz Noheda
Materials 2017, 10(3), 267; https://doi.org/10.3390/ma10030267
Received: 2 December 2016 / Revised: 16 February 2017 / Accepted: 23 February 2017 / Published: 7 March 2017
Based on precursor powders with a size of 200–300 nm prepared by the low-temperature solid reaction method, phase-pure YFeO3 ceramics are fabricated using spark plasma sintering (SPS) at different temperatures. X-ray diffraction (XRD) and scanning electron microscopy (SEM) reveal that the high-purity YFeO3 ceramics can be prepared using SPS, while the results from X-ray photoelectron spectroscopy (XPS) show that the concentration of oxygen vacancies resulting from transformation from Fe3+ to Fe2+ is low. The relative density of the 1000 °C-sintered sample is as high as 97.7%, which is much higher than those of the samples sintered at other temperatures. The present dielectric and magnetic properties are much better than those of the samples fabricated by conventional methods. These findings indicate that the YFeO3 ceramics prepared by the low temperature solid reaction and SPS methods possess excellent dielectric and magnetic properties, making them suitable for potential applications involving magnetic storage. View Full-Text
Keywords: multiferroic materials; spark plasma sintering; low-temperature solid reaction; dielectric properties; magnetic properties multiferroic materials; spark plasma sintering; low-temperature solid reaction; dielectric properties; magnetic properties
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Wang, M.; Wang, T.; Song, S.; Ma, Q.; Liu, R. Effect of Sintering Temperature on Structural, Dielectric, and Magnetic Properties of Multiferroic YFeO3 Ceramics Fabricated by Spark Plasma Sintering. Materials 2017, 10, 267.

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