| Effects of Pr on the structure and magnetic properties of FePt alloys |
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| 作者姓名： | CHENG Gang GU Zhengfei ZGOU Huaiying CHENG Jun YUAN Songliu |
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| 作者单位： | [1]Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China [2]Department of Information Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China |
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| 摘 要： | The effects of Pr on the structure and magnetic properties of PrxFe60.5-xPt39.5 alloys （x = 0, 0.5, 1.0, and 1.5） were investigated. X-ray diffraction data indicated that the phase transition temperature of FePt based alloys from disordered face-centered-cubic to ordered face-centered-tetragonal cubic decreases with the increase in Pr concentration. Pr plays the role of a grain refiner and it can enhance the exchange coupling between soft magnetic phase and hard magnetic phase. The results indicate that the replacement of Fe by Pr can significantly improve the remanence and coercivity of the Fe60.5Pt39.5 alloy. These results can be explained on the basis of phase transformation and microstructure. Both the remanence ratio and coercivity of the FePt based alloy as a function of the Pr content are increased by the optimum addition of 0.5 at.% Pr.
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| 关 键 词： | 铁铂基合金 铂元素 晶体结构 磁性 相变 各向异性常数 |
| 收稿时间： | 28 November 2005 |
Effects of Pr on the structure and magnetic properties of FePt alloys |
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| CHENG Gang GU Zhengfei ZGOU Huaiying CHENG Jun YUAN Songliu.Effects of Pr on the structure and magnetic properties of FePt alloys[J].Rare Metals,2007,26(1):19-22. |
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| Authors: | CHENG Gang GU Zhengfei ZHOU Huaiying CHENG Jun YUAN Songliu |
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| Affiliation: | 1. International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Balapur, Hyderabad 500005, India;2. Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad 500 058, India |
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| Abstract: | The effects of Pr on the structure and magnetic properties of PrxFe60.5-xPt39.5 alloys (x = 0, 0.5, 1.0, and 1.5) were investigated. X-ray diffraction data indicated that the phase transition temperature of FePt based alloys from disordered face-centered-cubic to ordered face-centered-tetragonal cubic decreases with the increase in Pr concentration. Pr plays the role of a grain refiner and it can enhance the exchange coupling between soft magnetic phase and hard magnetic phase. The results indicate that the replacement of Fe by Pr can significantly improve the remanence and coercivity of the Fe60.5Pt39.5 alloy. These results can be explained on the basis of phase transformation and microstructure. Both the remanence ratio and coercivity of the FePt based alloy as a function of the Pr content are increased by the optimum addition of 0.5 at.% Pr. |
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| Keywords: | phase transformation exchange coupling anisotropy constant Fe-Pt based alloys |
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