Magnetic properties of Fe-rich rare-earth intermetallic compounds with a ThMn12 structure

Ohashi, K.; Tawara, Yoshio; Osugi, Ryo; Shimao, Masayuki

doi:10.1063/1.342235

Cited by 140 publications

(38 citation statements)

References 6 publications

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“…The observed magnetic transitions at around 400 K and 1050 K correspond to the Curie temperature of the Sm 2 Fe 17 and ␣-Fe phases, respectively. The additional magnetic transition at around 520 K is below the reported Curie temperature of the ThMn 12 phase in the form of a single crystal, but agrees well with the Curie temperature of the ThMn 12 phase prepared by meltspinning (527 K) [22,23]. Thus, the magnetic transition at around 520 K is considered to be the Curie temperature of the ThMn 12 phase.…”

Section: Resultssupporting

confidence: 66%

Magnetic properties of Sm–Fe–Ti nanocomposite magnets with a ThMn12 structure

Saito

Miyoshi

Nishio–Hamane

2012

Journal of Alloys and Compounds

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Section: Resultssupporting

confidence: 66%

Magnetic properties of Sm–Fe–Ti nanocomposite magnets with a ThMn12 structure

Saito

Miyoshi

Nishio–Hamane

2012

Journal of Alloys and Compounds

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“…In particular, SmFe 11 Ti and SmFe 11 V were reported to be promising candidates for permanent magnets applications. [4][5][6] A variety of spin reorientations was observed in RFe 12−x M x ͑Ref. 1͒ and a first-order magnetization process ͑FOMP͒, i.e., a discontinuous increase of magnetization at a critical applied magnetic field, was evidenced on the high-field magnetization curves of single crystals of DyFe 11 Ti.…”

Section: Introductionmentioning

confidence: 98%

Magnetic structure and magnetization process ofNdCo12−xVx

et al. 2005

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NdCo 12−x V x ͑2.2ഛ x ഛ 2.6͒ crystallizes in the ThMn 12 -type structure and exhibits an unusual jump in the magnetization at a critical field B C that decreases with increasing V content. It was intriguing that the magnetization of the bulk samples below B C was very close to that of YCo 12−x V x with the same V content. To investigate the nature of the magnetic order in these materials we have carried out powder neutron diffraction measurements as a function of temperature and magnetic field on the NdCo 9.5 V 2.5 composition. In zero field we find that both the Nd and Co ions have substantial ordered moments ͑ϳ2.9 and 0.4 B , respectively͒ at low temperature ͑4 K͒, with the moments coupled ferromagnetically ͑T C = 180 K͒ and aligned along the c axis. On a loose powder an applied field of 4 to 7 T rotates the particles so the c axis aligns with the field, indicating a strong uniaxial anisotropy that renders the system Ising-like. However, we find the same in-field magnetic structure and essentially the same values for the saturated magnetic moments as those in zero field. Magnetization data on magnetically prealigned samples reveal that for fields applied parallel to the ͑easy͒ c axis the magnetization saturates below 0.5 T at a magnitude that is in very good agreement with the moments determined from neutron diffraction. For fields applied perpendicular to the c axis, on the other hand, the magnetization data show a two-plateau behavior, explaining the original magnetization data on randomly oriented powders. The strong dependence of the magnetization on the direction of the applied magnetic fields indicates an occurrence of the first-order magnetization process due to the competing magnetocrystalline anisotropies of the Nd and the Co sublattices and of the higher-order terms of the anisotropy energy.

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“…[1][2][3][4][5] have been the focus of numerous studies in the context of their potential as permanent magnet materials. They crystallize in the tetragonal ThMn 12 type structure with a space group of I4/mmm 5 .…”

Section: Introductionmentioning

confidence: 99%

Theoretical Investigation on the Phase Stability and Site Preference of R(Co,T)₁₂ and R(Co,T)₁₂N_x(R=Y, Ce, Pr, Nd, Sm, Gd, Tb, Ho, Er, Dy, T=Mo, Mn, Ni)

2003

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The phase stability and site preference of some ternary elements of ThMn 12 type rareearth intermetallic compounds R(Co,T) 12 and R(Co,T) 12 Nx are evaluated based on ab initio converted interatomic potentials. The calculated results show that adding either Mo or Mn makes the crystal cohesive energy decrease markedly. It proved that these elements can stabilize R(Co,T) 12 with ThMn 12 structure. The systemic energy is the lowest when T atoms occupy symmetrically 8i sites. For T = Mo or Mn, the doped nitrogen atom does not affect the order of site preference of these stabilizing elements. Moreover, the nitrogen atom occupies 2b sites. According to the calculated results, it can be seen that lattice parameters and X-rays are in good agreement with experiment. All the above results indicate that the ab initio converted pair potentials are effective for the calculation of these kinds of anisotropy materials and some related nitrides. PACS Number(s): 71.20.Eh; 34.20.Cf ; 81.05.zx; 61.66.-f

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Magnetic properties of Fe-rich rare-earth intermetallic compounds with a ThMn12 structure

Cited by 140 publications

References 6 publications

Magnetic properties of Sm–Fe–Ti nanocomposite magnets with a ThMn12 structure

Magnetic properties of Sm–Fe–Ti nanocomposite magnets with a ThMn12 structure

Magnetic structure and magnetization process ofNdCo12−xVx

Theoretical Investigation on the Phase Stability and Site Preference of R(Co,T)₁₂ and R(Co,T)₁₂N_x(R=Y, Ce, Pr, Nd, Sm, Gd, Tb, Ho, Er, Dy, T=Mo, Mn, Ni)

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Magnetic properties of Fe-rich rare-earth intermetallic compounds with a ThMn12 structure

Cited by 140 publications

References 6 publications

Magnetic properties of Sm–Fe–Ti nanocomposite magnets with a ThMn12 structure

Magnetic properties of Sm–Fe–Ti nanocomposite magnets with a ThMn12 structure

Magnetic structure and magnetization process ofNdCo12−xVx

Theoretical Investigation on the Phase Stability and Site Preference of R(Co,T)12 and R(Co,T)12Nx(R=Y, Ce, Pr, Nd, Sm, Gd, Tb, Ho, Er, Dy, T=Mo, Mn, Ni)

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Theoretical Investigation on the Phase Stability and Site Preference of R(Co,T)₁₂ and R(Co,T)₁₂N_x(R=Y, Ce, Pr, Nd, Sm, Gd, Tb, Ho, Er, Dy, T=Mo, Mn, Ni)