Co Incorporation on Structure, Conductivity and Magnetism of GaFeO3

doi:10.15541/jim20200183

Journal of Inorganic Materials ›› 2021, Vol. 36 ›› Issue (3): 319-324.DOI: 10.15541/jim20200183

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Co Incorporation on Structure, Conductivity and Magnetism of GaFeO₃

XIA Zhaoyang¹^,²(), WANG Hui¹, FANG Jinghong¹^,², ZHANG Yang¹, WANG Chaoyue¹, HE Huan¹, NI Jinqi¹, SHI Yun¹, LI Qin¹, YU Jianding¹^,²()

1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
2. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2020-04-07 Revised:2020-06-29 Published:2021-03-20 Online:2020-09-09
Contact: YU Jianding, professor. E-mail: yujianding@mail.sic.ac.cn
About author:XIA Zhaoyang(1995-), female, Master candidate. E-mail: Karenxzy@mail.ustc.edu.cn
Supported by:
Joint Funds of the National Natural Science Foundation of China(U1738114);Shanghai Science and Technology Committee(19DZ1100703);Shanghai Science and Technology Committee(19511107600);Shanghai Sailing Program(17YF1421500);Collaborative Research Project of Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology

Abstract

Abstract:

GaFeO₃ is one of the most promising ferromagnetic materials due to its magnetoelectric coupling effect. GaFe_1-_xCo_xO₃ (x=0, 0.02, 0.05, 0.07, 0.10) ceramics were prepared by the conventional solid-state method, and the effect of Co substitution on the microstructure, electrical leakage and magnetic properties was investigated. The XRD patterns and Rietveld refinement using the FullProf package showed that the secondary phase with a Fd3ˉm space group was present in addition to the main GFO phase with a Pc2₁n space group, and with an increase of Co doping, the proportion of the secondary phase and the lattice distortion increased. The leakage current density of the GFCO-x samples decreased by approximately 7 orders of magnitude for Co=2at%. The improved magnetization in GFCO ceramics was attributed to the secondary phase and enhanced lattice distortion. This work suggests that the magnetism was improved by doping Co and the leakage current would be decreased sharply without prominent fluctuation of T_C in the meantime by the incorporation of trace amounts of Co.

Key words: Co-doping GaFeO₃, solid-state sintering, leakage, magnetic transition temperature

CLC Number:

TQ174

XIA Zhaoyang, WANG Hui, FANG Jinghong, ZHANG Yang, WANG Chaoyue, HE Huan, NI Jinqi, SHI Yun, LI Qin, YU Jianding. Co Incorporation on Structure, Conductivity and Magnetism of GaFeO₃[J]. Journal of Inorganic Materials, 2021, 36(3): 319-324.

Figures/Tables 7

References 28

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Sample	Main phase	Secondary phase
GFCO-0	100.00(0.88)	-
GFCO-1	98.37(0.95)	1.63(0.20)
GFCO-2	96.43(0.49)	3.57(0.18)
GFCO-3	77.52(0.94)	22.48(0.50)

Sample	Main phase	Secondary phase
GFCO-0	100.00(0.88)	-
GFCO-1	98.37(0.95)	1.63(0.20)
GFCO-2	96.43(0.49)	3.57(0.18)
GFCO-3	77.52(0.94)	22.48(0.50)

Co Incorporation on Structure, Conductivity and Magnetism of GaFeO₃

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