Multiferroic properties of Bi0.95H0.05FeO3 polycrystalline films (H = Gd, Tb, Dy, Ho, Er)

T. K. Lin; H. W. Chang; C. Y. Hung; C. R. Wang; D. H. Wei; C. S. Tu; P. Y. Chen

doi:10.1063/9.0000560

AIP Advances (Feb 2023)

Multiferroic properties of Bi0.95H0.05FeO3 polycrystalline films (H = Gd, Tb, Dy, Ho, Er)

T. K. Lin,
H. W. Chang,
C. Y. Hung,
C. R. Wang,
D. H. Wei,
C. S. Tu,
P. Y. Chen

Affiliations

T. K. Lin: Department of Mechanical Engineering and Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106344, Taiwan
H. W. Chang: Department of Physics, National Chung Cheng University, Chiayi 621301, Taiwan
C. Y. Hung: Department of Applied Physics, Tunghai University, Taichung 407224, Taiwan
C. R. Wang: Department of Applied Physics, Tunghai University, Taichung 407224, Taiwan
D. H. Wei: Department of Mechanical Engineering and Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106344, Taiwan
C. S. Tu: Department of Physics, Fu Jen Catholic University, Taipei 242062, Taiwan
P. Y. Chen: Department of Mechanical Engineering, Ming Chi University of Technology, New Taipei City 243303, Taiwan

DOI: https://doi.org/10.1063/9.0000560
Journal volume & issue: Vol. 13, no. 2
pp. 025033 – 025033-5

Abstract

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We investigated the structure, ferroelectric, magnetic, and leakage characteristics of Bi0.95H0.05FeO3 (BHFO) polycrystalline films with H = Gd, Tb, Dy, Ho, and Er. Bi0.95H0.05FeO3 films were confirmed to mainly consist of the perovskite phase, and the phase structure belongs to the pseudo-cubic phase. The desired ferroelectric and ferromagnetic properties at the same time, the remanent polarization (2Pr) of 57–81 μC/cm2 and the saturation magnetization (Ms) of 11.6–21.3 emu/cm3, are obtained for Bi0.95H0.05FeO3 films. Lower 2Pr with smaller ionic radius of H is possibly related to limited ion movement because of the reduced volume of the unit cell in BHFO films. Low leakage current characteristics and leakage mechanisms in Bi0.95H0.05FeO3 films are also discussed. In aspect of the magnetic properties, H can significantly improve the magnetic properties of BFO by A-site substitutions due to the suppressed spiral structure and importantly the contribution of high magnetic moment of H ion. The results of this work suggests BHFO films is a good multiferroic material, especially the samples with H = Tb and Dy.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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