Soft magnetic properties of amorphous Fe52Co34Hf7B6Cu1 alloy treated by pulsed magnetic field and annealing

doi:10.1088/1674-1056/21/12/127805

Chin. Phys. B ›› 2012, Vol. 21 ›› Issue (12): 127805-127805.doi: 10.1088/1674-1056/21/12/127805

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Soft magnetic properties of amorphous Fe₅₂Co₃₄Hf₇B₆Cu₁ alloy treated by pulsed magnetic field and annealing

谷月^{a b}, 晁月盛^a, 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

收稿日期:2012-04-26 修回日期:2012-05-17 出版日期:2012-11-01 发布日期:2012-11-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 50771025).

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

Received:2012-04-26 Revised:2012-05-17 Online:2012-11-01 Published:2012-11-01
Contact: Chao Yue-Sheng E-mail:yschao@mail.neu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 50771025).

摘要/Abstract

摘要： 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.

关键词: amorphous alloys, pulse magnetic field, vacuum annealing, nanocrystallization

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.

Key words: amorphous alloys, pulse magnetic field, vacuum annealing, nanocrystallization

中图分类号: (Amorphous materials; glasses and other disordered solids)

78.55.Qr

76.80.+y (M?ssbauer effect; other γ-ray spectroscopy)

谷月, 晁月盛, 张艳辉. Soft magnetic properties of amorphous Fe₅₂Co₃₄Hf₇B₆Cu₁ alloy treated by pulsed magnetic field and annealing[J]. Chin. Phys. B, 2012, 21(12): 127805-127805.

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[J]. Chin. Phys. B, 2012, 21(12): 127805-127805.

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Soft magnetic properties of amorphous Fe₅₂Co₃₄Hf₇B₆Cu₁ alloy treated by pulsed magnetic field and annealing

Soft magnetic properties of amorphous Fe₅₂Co₃₄Hf₇B₆Cu₁ alloy treated by pulsed magnetic field and annealing

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