| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Soft magnetic properties of amorphous Fe52Co34Hf7B6Cu1 alloy treated by pulsed magnetic field and annealing |
| Gu Yue (谷月)a b, Chao Yue-Sheng (晁月盛)a, Zhang Yan-Hui (张艳辉)a |
a Institute of Materials Physics and Chemistry, College of Sciences, Northeastern University, Shenyang 110004, China;
b College of Sciences, University of Science and Technology Liaoning, Anshan 114044, China |
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Abstract The crystallization, microstructure, and soft magnetic properties of Fe52Co34Hf7B6Cu1 alloy are studied. Amorphous Fe52Co34Hf7B6Cu1 alloys are first treated by pulsed magnetic field with a medium frequency, and then annealed at 100℃-400℃ for 30 min in vacuum. The rise in temperature during the treatment by pulsed magnetic field is measured by a non-contact infrared thermometer. The soft magnetic properties of specimens are measured by a vibrating sample magnetometer (VSM). The microstructure changes of specimens are observed by Mössbauer spectroscopy and transmission electron microscope (TEM). The results show the medium-frequency pulsating magnetic field will promote nanocrystallization of the amorphous alloy with lower temperature rise. The nanocrystalline phase is α-Fe(Co) with bcc crystal structure, and the grain size is about 10 nm. After vacuum annealing at 100℃ for 30 min, scattering nanocrystalline phases become more uniform, the coercive force and the saturation magnetization of the specimens are 41.98 A/m and 185.15 emu/g.
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Received: 26 April 2012
Revised: 17 May 2012
Accepted manuscript online:
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PACS:
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78.55.Qr
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(Amorphous materials; glasses and other disordered solids)
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76.80.+y
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(M?ssbauer effect; other γ-ray spectroscopy)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 50771025). |
Corresponding Authors:
Chao Yue-Sheng
E-mail: yschao@mail.neu.edu.cn
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Cite this article:
Gu Yue (谷月), Chao Yue-Sheng (晁月盛), Zhang Yan-Hui (张艳辉) Soft magnetic properties of amorphous Fe52Co34Hf7B6Cu1 alloy treated by pulsed magnetic field and annealing 2012 Chin. Phys. B 21 127805
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