Materials Reports 2019, Vol. 33 Issue (z1): 343-347 |
METALS AND METAL MATRIX COMPOSITES |
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Doping Effect of Y3+ on Structure and Magnetic Properties of Ni-Cu-Zn Ferrite Nanoparticles |
HAN Yingqiang1, SUN Aimin1,2, PAN Xiaoguang1, ZHANG Wei1, ZHAO Xiqian1
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1 College of Physics and Electronics Engineering, Northwest Normal University, Lanzhou 730070 2 Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, Lanzhou 730070 |
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Abstract The Ni0.3Cu0.2Zn0.5YxFe2-xO4 (where x= 0, 0.025, 0.05, 0.075, 0.1) ferrite with Y3+ substituted partial Fe3+ was synthesized by sol-gel method at 950 ℃. The structure and magnetic properties of the sample were studied. It was found that a small amount of Y3+ doping does not destroy the crystal structure of Ni-Cu-Zn ferrite, but when the doping amount is more than 0.025, a small amount of YFeO3 foreign phase is formed. As the doping amount increases, the lattice constant first decreases and then increases, and the grain size and saturation magnetization increase first and then decrease. Compared with pure Ni0.3Cu0.2Zn0.5Fe2O4 ferrite, the coercivity, remanence, squareness ratio and Curie temperature of the doped samples increased, but all samples showed a paramagnetism. When the doping amount is 0.025, the saturation magnetization reaches 68.98 emu/g, and the Curie temperature increased to 215 ℃.
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Published: 05 July 2019
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About author:: Yingqiang Han is a graduate student in condensed matter physics at the School of Physics and Electronic Engineering, Northwest Normal University, focusing on the research of magnetic nanomaterials.Aimin Sun graduated from the Physics Department of Northwest Normal University in June 1985 and then taught at Northwest Normal University. He studied at Nanjing University from September 1993 to June 1998 and obtained his Ph.D. He is currently a professor, associate dean, master tutor of the School of Physics and Electronic Engineering of Northwest Normal University, and a government procurement expert of Gansu Pro-vince. He is mainly engaged in the research of superconducting and magnetic materials, and has published more than 60 research papers. |
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