文章基本信息

标题：Enhancement of anisotropy energy of SmCo ₅ by ceasing the coupling at 2c sites in the crystal lattice with Cu substitution
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作者：Syed Kamran Haider ; Hieu Minh Ngo ; Dongsoo Kim 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2021
卷号：11
DOI：10.1038/s41598-021-89331-z
语种：English
出版社：Springer Nature
摘要：SmCo 5 and SmCo 5−xCu x magnetic particles were produced by co-precipitation followed by reduction diffusion. HRTEM confirmed the Cu substitution in the SmCo 5 lattice. Non-magnetic Cu was substituted at “2c” site in the SmCo 5 crystal lattice and effectively stopped the coupling in its surroundings. This decoupling effect decreased magnetic moment from SmCo 5 (12.86 μ B) to SmCo 4Cu (10.58 μ B) and SmCo 3Cu 2 (7.79 μ B) and enhanced anisotropy energy from SmCo 5 (10.87 Mega erg/cm 3) to SmCo 4Cu (14.05 Mega erg/cm 3) and SmCo 3Cu 2 (14.78 Mega erg/cm 3). Enhancement of the anisotropy energy increased the coercivity as its values for SmCo 5, SmCo 4Cu and SmCo 3Cu 2 were recorded as 4.5, 5.97 and 6.99 kOe respectively. Being six times cheaper as compared to Co, substituted Cu reduced the price of SmCo 3Cu 2 up to 2%. Extra 15% Co was added which not only enhanced the M r value but also reduced the 5% of the total cost because of additional weight added to the SmCo 3Cu 2. Method reported in this work is most energy efficient method on the synthesis of Sm–Co–Cu ternary alloys until now.