Affiliation:
1. Critical Materials Innovation Hub, Lawrence Livermore National Laboratory, Livermore, CA 94551-0808, USA
Abstract
Alloys that are Ni-doped, such as the (Sm1−yZry)(Fe1−xCox)12 and (Ce0.5Sm0.5)Fe10Co2 systems, are studied because of their magnetic properties. The (Sm1−yZry)(Fe1−xCox)11−zTiz and (Ce.1−xSmx)Fe9Co2Ti alloys are considered contenders for vastly effective permanent magnets because of their anisotropy field and Curie temperature. Ti can act as a stabilizer for the SmFe12 compound but substantially suppresses saturation magnetization. To maintain the saturation magnetization in the scope of 1.3–1.5 T, we propose substituting a particular quantity of Fe and Co in the (Sm1−yZry)(Fe1−xCox)12 and (Ce0.5Sm0.5)Fe10Co2 alloys with Ni. By performing ab initio calculations, we show that Ni incorporation results in increased thermodynamic stability and, in contrast to Ti, has a parallel spin moment aligned to the moment of the SmFe12 compound and improves its saturation magnetization without affecting the anisotropy field or Curie temperature.
Funder
US Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Materials and Manufacturing Technologies Office
Subject
General Materials Science,Metals and Alloys
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