High-temperature properties of Fe-Pt film-magnets prepared by electroplating method
High-temperature properties of Fe-Pt film-magnets prepared by electroplating method
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DOI：
10.1063/1.5130466
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发表时间：
2020-01
期刊：
影响因子：
1.6
通讯作者：
T. Yanai;Y. Omagari;Seiya Furutani;A. Yamashita;N. Fujita;T. Morimura;M. Nakano;H. Fukunaga
中科院分区：
文献类型：
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作者：
T. Yanai;Y. Omagari;Seiya Furutani;A. Yamashita;N. Fujita;T. Morimura;M. Nakano;H. Fukunaga
采用电镀法制备了L10有序Fe50Pt50厚膜，并在25 ~ 200℃的温度范围内对其高温性能进行了评价。采用普通退火方法（700℃，60 min）退火的Fe50Pt50薄膜在150℃时的Hc和（BH）max分别为500 kA/m和50 kJ/m3， Hc热系数为-0.3%/℃。为了提高材料的高温性能，我们采用了8 kW红外炉闪蒸退火的方法。闪蒸退火法提高了材料的高温性能（150℃时Hc = 700 kA/m, (BH)max = 70 kJ/m3）和热系数（-0.21%/℃）。薄膜的热稳定性与sm - co -体系磁体相当，优于nd - fe - b -体系磁体。因此，我们发现通过电镀和闪蒸退火制备的L10有序Fe50Pt50薄膜是在宽温度范围内有希望的小磁体之一。采用电镀法制备了L10有序Fe50Pt50厚膜，并在25 ~ 200℃的温度范围内对其高温性能进行了评价。采用普通退火方法（700℃，60 min）退火的Fe50Pt50薄膜在150℃时的Hc和（BH）max分别为500 kA/m和50 kJ/m3， Hc热系数为-0.3%/℃。为了提高材料的高温性能，我们采用了8 kW红外炉闪蒸退火的方法。闪蒸退火法提高了材料的高温性能（150℃时Hc = 700 kA/m, (BH)max = 70 kJ/m3）和热系数（-0.21%/℃）。薄膜的热稳定性与sm - co -体系磁体相当，优于nd - fe - b -体系磁体。因此，我们发现通过电镀和闪蒸退火制备的L10有序Fe50Pt50薄膜是在宽温度范围内有希望的小磁体之一。
We prepared L10 ordered Fe50Pt50 thick-films on Cu substrates using the electroplating method and evaluated their high-temperature properties in the temperature range of 25-200°C. The Hc and the (BH)max at 150°C for the Fe50Pt50 films annealed by ordinary annealing method (700°C, 60 min) were 500 kA/m and 50 kJ/m3, respectively, and the thermal coefficient of Hc was -0.3%/°C. To improve the high-temperature properties, we employed a flash annealing method using an infrared furnace (8 kW). The flash annealing method improved the high-temperature properties (Hc = 700 kA/m, (BH)max = 70 kJ/m3 at 150°C) and the thermal coefficient (-0.21%/°C). The thermal stability of the films is comparable to those for Sm-Co-system magnets and better than for Nd-Fe-B-system ones. We, therefore, found the L10 ordered Fe50Pt50 films prepared by the electroplating and the flash annealing are one of the hopeful small magnets in the wide temperature range.We prepared L10 ordered Fe50Pt50 thick-films on Cu substrates using the electroplating method and evaluated their high-temperature properties in the temperature range of 25-200°C. The Hc and the (BH)max at 150°C for the Fe50Pt50 films annealed by ordinary annealing method (700°C, 60 min) were 500 kA/m and 50 kJ/m3, respectively, and the thermal coefficient of Hc was -0.3%/°C. To improve the high-temperature properties, we employed a flash annealing method using an infrared furnace (8 kW). The flash annealing method improved the high-temperature properties (Hc = 700 kA/m, (BH)max = 70 kJ/m3 at 150°C) and the thermal coefficient (-0.21%/°C). The thermal stability of the films is comparable to those for Sm-Co-system magnets and better than for Nd-Fe-B-system ones. We, therefore, found the L10 ordered Fe50Pt50 films prepared by the electroplating and the flash annealing are one of the hopeful small magnets in the wide temperature range.