Spin-wave dispersion and exchange stiffness in Nd$_2$Fe$_{14}$B and $R$Fe$_{11}$Ti ($R$=Y, Nd, Sm) from first-principles calculations
Phys. Rev. B 103, 024418 (2021) We theoretically investigate spin-wave dispersion in rare-earth magnet compounds by using first-principles calculations and a method we call the reciprocal-space algorithm (RSA). The value of the calculated exchange stiffness for Nd$_2$Fe$_{14}$B is within the range o...
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| Language | English |
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29.10.2020
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| Abstract | Phys. Rev. B 103, 024418 (2021) We theoretically investigate spin-wave dispersion in rare-earth magnet
compounds by using first-principles calculations and a method we call the
reciprocal-space algorithm (RSA). The value of the calculated exchange
stiffness for Nd$_2$Fe$_{14}$B is within the range of reported experimental
values. We find that the exchange stiffness is considerably anisotropic when
only short-range exchange couplings are considered, whereas inclusion of
long-range couplings weakens the anisotropy. In contrast, $R$Fe$_{11}$Ti
($R$=Y, Nd, Sm) shows large anisotropy in the exchange stiffness. |
|---|---|
| AbstractList | Phys. Rev. B 103, 024418 (2021) We theoretically investigate spin-wave dispersion in rare-earth magnet
compounds by using first-principles calculations and a method we call the
reciprocal-space algorithm (RSA). The value of the calculated exchange
stiffness for Nd$_2$Fe$_{14}$B is within the range of reported experimental
values. We find that the exchange stiffness is considerably anisotropic when
only short-range exchange couplings are considered, whereas inclusion of
long-range couplings weakens the anisotropy. In contrast, $R$Fe$_{11}$Ti
($R$=Y, Nd, Sm) shows large anisotropy in the exchange stiffness. |
| Author | Fukazawa, Taro Akai, Hisazumi Harashima, Yosuke Miyake, Takashi |
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| BackLink | https://doi.org/10.1103/PhysRevB.103.024418$$DView published paper (Access to full text may be restricted) https://doi.org/10.48550/arXiv.2010.16022$$DView paper in arXiv |
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| Snippet | Phys. Rev. B 103, 024418 (2021) We theoretically investigate spin-wave dispersion in rare-earth magnet
compounds by using first-principles calculations and a... |
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| SubjectTerms | Physics - Materials Science |
| Title | Spin-wave dispersion and exchange stiffness in Nd$_2$Fe$_{14}$B and $R$Fe$_{11}$Ti ($R$=Y, Nd, Sm) from first-principles calculations |
| URI | https://arxiv.org/abs/2010.16022 |
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