Structural and magnetic properties of RFe10Si2 compounds

Stefański, P.; Wrzeciono, A.

doi:10.1016/0304-8853(89)90072-3

Cited by 36 publications

(13 citation statements)

References 17 publications

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“…In this method Tr can be expressed as Equation (1) is obtained after neglecting weak R-R interactions. From the crystal structure of ThMn1 2 , it follows that each R atom has an average number [2]) one finds J FeFe /k B = 75 K. This value of the coupling constant was subsequently used in Eq. (1) when applied to DyFel0Si2 (Tc = 568 K) and ErFe10Si2(Tc = 549 K).…”

Section: Resultsmentioning

confidence: 99%

“…Also, the R-sublattice anisotropy decreases much faster with increasing temperature than the T-sublattice anisotropy. In the RFe 10Si2 compounds, the Fe anisotropy favourizes the c-axis in the whole range of temperature [2]. The easy magnetization (259) direction (EMD) of the R sublattice depends on the crystal electric field (CEF) interaction and the exchange field experienced by the R ion.…”

Section: Introductionmentioning

confidence: 99%

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Spin Reorientation and Exchange Coupling in the Dy_1-xEr_xFe₁₀Si₂Compounds

et al. 1994

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spin Reorientation and Exchange Coupling in the Dy_1-xEr_xFe₁₀Si₂Compounds

et al. 1994

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“…The lattice constants of GdFe10V2 were taken from [11] and of GdFe 1 0 C r 2 and GdFe10Si2 from [12] and [13], respectively.…”

Section: Pauling's Chemical Bond Modelmentioning

confidence: 99%

Single-Ion Rare Earth Anisotropy in ThMn₁₂-Type Compounds

Stefański

1994

Acta Phys. Pol. A

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The single-ion rare earth anisotropy was investigated in ThMni2-type compounds. For this purpose the crystal electric field parameter values were studied. In these compounds, described by formula RFe 12_xTx , R = rare earth, T = Ti, V, Cr, Mo, W and Si, the T atoms have strong crystallographic site preference changing the local crystal electric field potential which "sees" the rare earth ion. The crystal electric field potentials A20 were calculated considering this site preference. The summations were performed taking into account the nearest neighborhood of the rare earth ion according to the recent results of band structure calculations. The charges of the surrounding Fe and T atoms were established applying the chemical bond model proposed by Pauling. The absolute value of A3 decreases when the content of vanadium increases in 8(i) position, which is in agreement with experimental data. Localization of Si atoms in 8(j) and 8(f) causes a decrease in A 20. The 1 55 GdMössbauer spectroscopy data confirm this fact. Miedema's "macroscopic" atom model of cohesion in alloys was applied for interpretation of the role of T atoms in the isomer shift and volume effects.

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“…The Ni subsystem can be considered as a Pauli paramagnet as already observed in ΥΝi10Si2 [3]. It is wort h noting that neutron spectroscopy measurements performed on a sample containing Tb [2] showed crystal-field level excitations that were not well resolved due to a complex level scheme.The method of preparation of ΤbNi 10Si 2 and YΝi 10 Si 2 has been described elsewhere [4]. The alloyed samples have been annealed for three weeks at 1100°C.…”

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“…The method of preparation of ΤbNi 10Si 2 and YΝi 10 Si 2 has been described elsewhere [4]. The alloyed samples have been annealed for three weeks at 1100°C.…”

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Ground State Properties of Tb³⁺Ion in TbNi₁₀Si₂

et al. 1997

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Ground state properties of Tb3+ ion were investigated in the tetragonalT h Μ n h 1 2 -t y p e T b N i 1 0 S i 2 c o m p o u n d o n t l e b a s i s o f t e m p e r a t u r e d e p e n d e n c e of tle paramagnetic susceptibility and magnetization measurements. The rare earth temperature dependence of the susceptibility was calculated using the Van Vleck equation. The Γt5(1) doublet is suggested to be a ground state separated by 9 K from the first excited singlet Γ (12 ). The magnetic moment associated with the ground state doublet agrees with saturation magnetization data at 4.2 K. The overall crystal field splitting is estimated to be 105 K.PACS numbers: 75.30. Gw, 75.50.Gg The recent permanent magnet research stimulates investigations of various anisotropic iron-rich intermetallics. Among tlem there are compounds of the form RFe12 -x Τ (Τ = Ti, V, Cr, Mo, W and Si [1]) with tetragonal ThMn 1 2-type structure, which are isomorphous with non-magnetic RNi 1 0Si 2 series. The paramagnetic behaviour of the latter compounds is dominated by the crystal-field effects in the rare earth subsystem, since the magnetic moment at Ni sites is not significant [2]. The aim of the present paper is to investigate the crystal-field level structure of Tb3+ with the use of magnetic measurements in ΤbΝi 10 Si2 . The Ni subsystem can be considered as a Pauli paramagnet as already observed in ΥΝi10Si2 [3]. It is wort h noting that neutron spectroscopy measurements performed on a sample containing Tb [2] showed crystal-field level excitations that were not well resolved due to a complex level scheme.The method of preparation of ΤbNi 10Si 2 and YΝi 10 Si 2 has been described elsewhere [4]. The alloyed samples have been annealed for three weeks at 1100°C. Magnetic susceptibility measurements were carried out in the temperature range (281)

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Structural and magnetic properties of RFe10Si2 compounds

Cited by 36 publications

References 17 publications

Spin Reorientation and Exchange Coupling in the Dy_1-xEr_xFe₁₀Si₂Compounds

Spin Reorientation and Exchange Coupling in the Dy_1-xEr_xFe₁₀Si₂Compounds

Single-Ion Rare Earth Anisotropy in ThMn₁₂-Type Compounds

Ground State Properties of Tb³⁺Ion in TbNi₁₀Si₂

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Structural and magnetic properties of RFe10Si2 compounds

Cited by 36 publications

References 17 publications

Spin Reorientation and Exchange Coupling in the Dy1-xErxFe10Si2Compounds

Spin Reorientation and Exchange Coupling in the Dy1-xErxFe10Si2Compounds

Single-Ion Rare Earth Anisotropy in ThMn12-Type Compounds

Ground State Properties of Tb3+Ion in TbNi10Si2

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Spin Reorientation and Exchange Coupling in the Dy_1-xEr_xFe₁₀Si₂Compounds

Spin Reorientation and Exchange Coupling in the Dy_1-xEr_xFe₁₀Si₂Compounds

Single-Ion Rare Earth Anisotropy in ThMn₁₂-Type Compounds

Ground State Properties of Tb³⁺Ion in TbNi₁₀Si₂