Soft magnetic properties of amorphous Fe_(52)Co_(34)Hf_7B_6Cu_1 alloy treated by pulsed magnetic field and annealing
查看参考文献14篇
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文摘
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The crystallization, microstructure, and soft magnetic properties of Fe_(52)Co_(34)Hf_7B_6Cu_1 alloy are studied. Amorphous Fe_(52)Co_(34)Hf_7B_6Cu_1 alloys are first treated by a pulsed magnetic field with a medium frequency, and then annealed at 100 °C-400 °C for 30 min in a vacuum. The rise in temperature during the treatment by a 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 a Mossbauer spectroscopy and transmission electron microscope (TEM). The results show the medium-frequency pulsating magnetic field will promote nanocrystallization of the amorphous alloy with a 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 °C 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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来源
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Chinese Physics. B
,2012,21(12):127805-1-127805-4 【核心库】
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关键词
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amorphous alloys
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pulsed magnetic field
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vacuum annealing
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nanocrystallization
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地址
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Institute of Materials Physics and Chemistry, College of Sciences,Northeastern University, Shenyang, 110004
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语种
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英文 |
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ISSN
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1674-1056 |
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学科
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物理学 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:4740362
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