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Large Coercive Field of 45 kOe in a Magnetic Film Based on Metal-Substituted ε-Iron Oxide

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† Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
‡ Cryogenic Research Center, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan
§ Division of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
*[email protected]
*[email protected]
Cite this: J. Am. Chem. Soc. 2017, 139, 38, 13268–13271
Publication Date (Web):September 13, 2017
https://doi.org/10.1021/jacs.7b07087
Copyright © 2017 American Chemical Society
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Abstract

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Magnetic ferrites are stable, sustainable, and economical. Consequently, they have been used in various fields. The development of large coercive field (large Hc) magnetic ferrites is a very important but challenging issue to accelerate the spread of use and to expand practical applications. In this study, we prepared a rhodium-substituted ε-iron oxide film and observed a remarkably large Hc value of 35 kOe at room temperature. This is the largest value among magnetic ferrites to date. Such a large-Hc ferrite is expected to greatly expand the application of magnetic ferrites. Furthermore, when the temperature dependence of the magnetic properties was measured, an even larger Hc value of 45 kOe was recorded at 200 K. Such large Hc values are much larger than those of conventional hard magnetic ferrites.

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The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/jacs.7b07087.

  • Additional experimental details, X-ray diffraction peaks for the oriented and nonoriented films, calculation of the magnetization direction, and crystal and magnetic structures and magnetization curve of ε-Rh0.14Fe1.86O3 nanoparticles (PDF)

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This article is cited by 24 publications.

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  2. Shin-ichi Ohkoshi, Kenta Imoto, Asuka Namai, Marie Yoshikiyo, Seiji Miyashita, Hongsong Qiu, Shodai Kimoto, Kosaku Kato, Makoto Nakajima. Rapid Faraday Rotation on ε-Iron Oxide Magnetic Nanoparticles by Visible and Terahertz Pulsed Light. Journal of the American Chemical Society 2019, 141 (4) , 1775-1780. https://doi.org/10.1021/jacs.8b12910
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  13. Marin Tadic, Irena Milosevic, Slavko Kralj, Darko Hanzel, Tanja Barudzija, Laurence Motte, Darko Makovec. Surface-induced reversal of a phase transformation for the synthesis of ε-Fe2O3 nanoparticles with high coercivity. Acta Materialia 2020, 188 , 16-22. https://doi.org/10.1016/j.actamat.2020.01.058
  14. Badari Narayana Rao, Shintaro Yasui, Tsukasa Katayama, Ayako Taguchi, Hiroki Moriwake, Yosuke Hamasaki, Mitsuru Itoh. Investigation of ferrimagnetism and ferroelectricity in Al x Fe 2−x O 3 thin films. Journal of Materials Chemistry C 2020, 8 (2) , 706-714. https://doi.org/10.1039/C9TC05390E
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  16. Victor Ukleev, Mikhail Volkov, Alexander Korovin, Thomas Saerbeck, Nikolai Sokolov, Sergey Suturin. Stabilization of ε − Fe 2 O 3 epitaxial layer on MgO(111)/GaN via an intermediate γ -phase. Physical Review Materials 2019, 3 (9) https://doi.org/10.1103/PhysRevMaterials.3.094401
  17. J. López-Sánchez, A. Serrano, A. del Campo, M. Abuín, E. Salas-Colera, A. Muñoz-Noval, G. R. Castro, J. de la Figuera, J. F. Marco, P. Marín, N. Carmona, O. Rodríguez de la Fuente. Self-assembly of iron oxide precursor micelles driven by magnetic stirring time in sol–gel coatings. RSC Advances 2019, 9 (31) , 17571-17580. https://doi.org/10.1039/C9RA03283E
  18. Yunguo Wang, Ji Ma, Sizhi Zuo-Jiang, Yanli Li, Guoqi Li, Kezheng Chen. Self-assembling ε-Fe2O3/SiO2 nanoparticles to nanoflakes with paramagnetic-class properties via a milling-etching route. Advanced Powder Technology 2019, 30 (2) , 277-283. https://doi.org/10.1016/j.apt.2018.11.003
  19. Jheng-Guang Li, Giulia Fornasieri, Anne Bleuzen, Martí Gich, Marianne Impéror-Clerc. Epsilon-Fe 2 O 3 Nanocrystals inside Mesoporous Silicas with Tailored Morphologies of Rod, Platelet and Donut. ChemNanoMat 2018, 4 (11) , 1168-1176. https://doi.org/10.1002/cnma.201800266
  20. Djordje Trpkov, Matjaž Panjan, Lazar Kopanja, Marin Tadić. Hydrothermal synthesis, morphology, magnetic properties and self-assembly of hierarchical α-Fe2O3 (hematite) mushroom-, cube- and sphere-like superstructures. Applied Surface Science 2018, 457 , 427-438. https://doi.org/10.1016/j.apsusc.2018.06.224
  21. Ping Niu, Tingting Wu, Lei Wen, Jun Tan, Yongqiang Yang, Shijian Zheng, Yan Liang, Feng Li, John T. S. Irvine, Gang Liu, Xiuliang Ma, Hui-Ming Cheng. Substitutional Carbon-Modified Anatase TiO 2 Decahedral Plates Directly Derived from Titanium Oxalate Crystals via Topotactic Transition. Advanced Materials 2018, 30 (20) , 1705999. https://doi.org/10.1002/adma.201705999
  22. Marie Yoshikiyo, Asuka Namai, Kenta Imoto, Hiroko Tokoro, Shin-ichi Ohkoshi. Highly Oriented Magnetic Film Composed of Ga-Substituted ε-Iron Oxide and the Angular Dependence of the Magnetic Hysteresis Loops. European Journal of Inorganic Chemistry 2018, 2018 (7) , 847-851. https://doi.org/10.1002/ejic.201701137
  23. Jeotikanta Mohapatra, Jia Ping Liu. Rare-Earth-Free Permanent Magnets: The Past and Future. 2018,,, 1-57. https://doi.org/10.1016/bs.hmm.2018.08.001
  24. . . 2018,,https://doi.org/

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