Materials Reports  2019, Vol. 33 Issue (z1): 122-125 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Structure, Magnetism and Heating Properties in AC Magnetic Field of Mg1-xCaxFe2O4 Ferrites |
| Chunfeng B1,2, Tegus O1, Tsogbadrakh N2 , Sangaa D3
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1 Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials, Inner Mongolia Normal University, Hohhot 010022
2 Department of Physics, National University of Mongolia, Ulaanbaatar 14201, Mongolia
3 Institute of Physics and Technology, Mongolian Academy of Science, Ulaanbaatar 13330, Mongolia |
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Abstract A series of Mg1-xCaxFe2O4 ferrites was prepared by a solid-state reaction method. The crystal structure, the morphology and chemical composition, the magnetic properties of the ferrites were investigated by using XRD, SEM and VSM, respectively. The heating performance was measured in an alternating magnetic field (25 kHz). The results show that the ferrites form the single-phase cubic spinel structure in the Ca content x between 0 and 0.3, while a tetragonal phase forms at x=0.4. The lattice constants, the coercivity and the grain sizes increase with x, while the saturation magnetization changes nonlinearly. The saturation magnetization (Ms) reaches a maximum of 16.37 A·m2·kg-1 and the heating property is maximum at x = 0.1. It turns out that appropriate amounts of Ca substitution for Mg could improve the magnetic and heating performance of the ferrites, which have potential application and promising approaches for tumor therapy.
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Published: 05 July 2019
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| About author:: Feng Chun graduated from Okayama University in Japan in April 2006 with a Master of Science degree. From October 2015 to present, as a PhD student in National University of Mongolia, his study focuses on the magnetic materials for high heating performance.O. Tegus, Ph.D., professor in Inner Mongolia Normal University, research focus on magnetic materials.Namsrai Tsogbadrakh, graduated PhD degree from the Institute for Materials Research in University of Salford, UK. He works at the department of Physics, National University of Mongolia, Ulaanaatar, Mongolia by a professor. His research interests are concerned with the materials characterization experiments, lattice dynamics and electronic band structure predictions, magnetic and magnetocrystalline anisotropy properties for energy advanced magnetic materials, such as application of Li-ion battery, spintronics and heat generation ability. In addition, he interest the developments of electronic band structure theory, such as DFT, Green function methods and ab initio GW-approximation, CPA and DMFT |
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