Doping the permanent magnet CeFe11Ti with Co and Ni using ab-initio density functional methods

Dasmahapatra, Atreyi; Martínez-Casado, Ruth; Romero‐Muñiz, Carlos; Sgroi, Mauro Francesco; Ferrari, Anna Maria; Maschio, Lorenzo

doi:10.1016/j.physb.2021.413241

Cited by 3 publications

(1 citation statement)

References 40 publications

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“…Thus, Ce-based magnets with the ThMn 12 -type intermetallic compound would be perfect candidates for new-rare earth permanent magnets [19][20][21][22]. Theoretical analyses have shown that Ce might possibly stabilize the ThMn 12 -type intermetallic compound [23][24][25][26][27]. Goll et al [28] found that a CeTiFe 1−x Co x arc melted (and quenched) magnet shows the maximum value of the saturation magnetization, µ 0 M s = 1.27 T, magnetic anisotropy energy (MAE), K 1 = 2.15 MJ/m 3 , and the maximum energy product, |BH| max = 282 kJ/m 3 , at x ≈ 1.95, are considerably reduced compared to Neomax (µ 0 M s = 1.61 T, µ 0 H a = 7.60 T, and |BH| max ~515 kJ/m 3 ) [16].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics and Magnetism of SmFe12 Compound Doped with Zr, Ce, Co and Ni: An Ab Initio Study

Landa,

Söderlind,

Moore

et al. 2024

Metals

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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.

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Section: Introductionmentioning

confidence: 99%

Thermodynamics and Magnetism of SmFe12 Compound Doped with Zr, Ce, Co and Ni: An Ab Initio Study

Landa,

Söderlind,

Moore

et al. 2024

Metals

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Effect of transition metal doping on magnetic hardness of CeFe12-based compounds

Snarski-Adamski

Werwiński²

2022

Journal of Magnetism and Magnetic Materials

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Thermodynamics and Magnetism of SmFe12 Compound Doped with Co and Ni: An Ab Initio Study

et al. 2022

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Ni-doped Sm(Fe1−xCox)12 alloys are investigated for their magnetic properties. The Sm(Fe,Co)11M1 compound (M acts as a stabilizer) with the smallest (7.7 at.%) rare-earth-metal content has been recognized as a possible contender for highly efficient permanent magnets thanks to its significant anisotropy field and Curie temperature. The early transition metals (Ti-Mn) as well as Al, Si, and Ga stabilize the SmFe12 compound but significantly decrease its saturation magnetization. To keep the saturation magnetization in the range of 1.4–1.6 T, we suggest replacing a certain amount of Fe and Co in the Sm(Fe1−xCox)12 alloys with Ni. Ni plays the role of a thermodynamic stabilizer, and contrary to the above-listed elements, has the spin moment aligned parallel to the spin moment of the SmFe12 compound, thereby boosting its saturation magnetization without affecting the anisotropy field or Curie temperature.

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Doping the permanent magnet CeFe11Ti with Co and Ni using ab-initio density functional methods

Cited by 3 publications

References 40 publications

Thermodynamics and Magnetism of SmFe12 Compound Doped with Zr, Ce, Co and Ni: An Ab Initio Study

Thermodynamics and Magnetism of SmFe12 Compound Doped with Zr, Ce, Co and Ni: An Ab Initio Study

Effect of transition metal doping on magnetic hardness of CeFe12-based compounds

Thermodynamics and Magnetism of SmFe12 Compound Doped with Co and Ni: An Ab Initio Study

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