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【期刊论文】Magnetic properties of R3 (Fe, M0) 29 (R=Sm and Y) with Ga substituted for Fe
潘洪革, Hongge Pan a, b, *, Yun Chen b, Changpin Chenu, Ning Tang a, Fuming Yang a
Journal of Magnetism and Magnetic Materials 170 (1997) 179-183,-0001,():
-1年11月30日
The Y3 (Fe0.969-xMo0.031Gax) 29 (X≤0.15) and Sm3 (Fe0.966-xMo0.034Gax) 29 (X≤0.10) compounds have been successfully prepared. By means of X-ray diffraction analysis, it was shown that all of the investigated compounds crystallized in the Nd3 (Fe, Ti) zg-structure. The effects of Ga substitution for Fe in the Y3 (Fe0.969Mo0.031) 29 and Sm3 (Fe0.966Mo0.034) 29 compounds on the lattice parameters, and intrinsic magnetic properties including Curie temper-atures, saturation magnetization, and magnetocrystalline anisotropy of the investigated compounds are reported.
Rare-earth transition-metal compounds, Substitution effects, Curie temperature, Magnetization, Magneto-crystalline anisotropy
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【期刊论文】Magnetic properties of Nd3 (Fe, Mo) 29 compound and its nitride
潘洪革, Hongge Pan
Journal of Magnetism and Magnetic Materials 185 (1998) 231-234,-0001,():
-1年11月30日
The iron-rich ternary intermetallic compound Nd3 (Fe, Mo) 29 with the Nd3 (Fe, Ti) 29-type monoclinic structure and its nitride were prepared. After nitrogenation, the nitride retains the structure of the parent compound, but the unit-cell volume of the nitride is 5.9% greater than that of the parent compound. The Curie temperature of Nd3 (Fe, Mo) 29 nitride is 70.9% higher than that of the parent compound and the saturation magnetization of the nitride is about 6.6% (at 4.2K) and 23.7% (at 300K) higher than that of the parent compound. The anisotropy of the nitride is similar to that of parent compound, which exhibits plane anisotropy.
Magnetic properties, Rare-earth-transition-metal compound
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【期刊论文】Magnetic properties of Sm3 (Fe, Mo) 29Nx interstitial nitride
潘洪革, Hongge Pana, b, *, Changpin Chenb, C.S. Wang b, Xiufeng Han a, Fuming Yang a
Journal of Magnetism and Magnetic Materials 170 (1997) 331-334,-0001,():
-1年11月30日
Sm3 (Fe, Mo) 29Nx nitride has been synthesized at 823K for 2.5h by gas phase reaction under 1 atm of nitrogen. The nitride retains the structure of parent compound. The unit cell volume of the nitride is 4.7% greater than that of the parent compound. Introduction of nitrogen leads to an increase of Curie temperature Tc from 445K for the parent to 704K for the nitride, and an increase of saturation magnetization Ms from 135Am2/kg for the parent to 152Am2/kg for the nitride at 4.2K, and from 107Am2/kg for the parent to 137Am2/kg for the nitride at 300K. The nitride exhibits uniaxial anisotropy with an anisotropy field Ba of 20.5T at 4.2K and 14.6T at 300K.
Rare-earth transition-metal compounds, Saturation magnetization, Curie temperature, Interstitial nitride
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【期刊论文】Structural and magnetic characterization of the ternary phase R3 (Fe, Mo) 29 (R=Tb and Dy)
潘洪革, Hongge Pan a, b, *, Fuming Yang a, Changpin Chen b Ning Tang a Xiufeng Han a Qidong Wang b
Journal of Magnetism and Magnetic Materials 163 (1996) 221-224,-0001,():
-1年11月30日
The optimum compositions and annealing conditions of the preparing single-phase R3 (Fe, Mo) 29 (R=Tb and Dy) are reported. The structural characterization by X-ray powder diffraction provides evidence for a Nd3 (Fe, Ti) 29-type compound with the space group A2/m. The Curie temperatures Tc are 437 K for Tb3 (Fe, Mo) 29 and 408K for Dy3 (Fe, Mo) 29. The saturation magnetization Ms values are 77.5Am2/kg at 4.2K and 70.4Am2/kg at 300K for Tb3 (Fe, Mo) 29, and 73.0Am2/kg at 4.2K and 65.2Am2/kg at 300K for Dyz (Fe, Mo) 29.
Rare-earth-transition-metal compounds, Magnetic properties
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【期刊论文】Study of the exchange interactions in R3 (Fe, M) 29 intermetallic compounds
潘洪革, Hongge Pan a, b, *, Jianli Wang a, Changpin Chen b, Xiufeng Han a, Ning Tang a, Qidong Wang b, Fuming Yang a
Journal of Magnetism and Magnetic Materials 164 (1996) 197-200,-0001,():
-1年11月30日
The effective exchange coupling parameters JFeFe in the Fe sublattice and JRFe between the R and Fe sublattices have been calculated based on a mean field approximation according to the experimental values of the Curie temperatures of R3 (Fe, M) 29 (R=rare earth, M=V, Ti and Mo). JFeFe is largest when M=V and smallest when M=Mo, but JRFe is largest when M=Ti and smallest when M=Mo for the same R and different M in the R3 (Fe, M) 29 compounds.
Exchange interaction, Rare earth-iron intermetallics, Mean field analysis
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