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唐少龙, G.B. Ji, S.L. Tang*, S.K. Ren, F.M. Zhang, B.X. Gu, Y.W. Du
Journal of Crystal Growth 270(2004)156-161,-0001,():
-1年11月30日
A simple hydrothermal route, using cetyltrimethylammonium bromide (CTAB) as the surfactant, has been proposed for synthesizing single-crystalline spinal cobalt ferrite (CoFe2O4) nanorods. Transmission electron microscope (TEM) and scanning electron microscopy (SEM) images indicated that the final product consists of nanorods with a diameter of about 25nm andlength up to about 120 nm.Furthermore, high-resolution TEM (HRTEM) revealeda clear lattice structure of the [1 0 0] planes in the nanorods. The magnetic properties of the CoFe2O4 nanorods were characterized using vibrating sample magnetometer (VSM). The possible formation mechanism for the CTAB-assistedhyd rothermal synthesis of CoFe2O4 nanorods has been discussed.
A2., Hydrothermal crystal growth, B1., Nanomaterials, B2., Magnetic materials
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唐少龙, S.L. Tang a, b, *, C.H. Wu a, c X.M. Jin a, B.W. Wang a, G.S. Li a, B.Z. Ding a, Y.C. Chuang a
Journal of Alloys and Compounds 264(1998)240-243,-0001,():
-1年11月30日
Phase formation in annealed mechanical alloyed NdFe V Ti, and magnetic properties of the consequent phases and their 10.51+x1.5 (1-x)Tix nitrides were investigated by using X-ray diffraction and magnetic measurement. From the X-ray diffraction patterns we have constructed a phase formation diagram as a function of Ti content x and annealing temperature. The demarcation curve between 1:7 and 1:12 phases moves to higher annealing temperatures with increasing Ti content. In the NdFe Ti alloy the ThMn structure is obtained by annealing 11:12 the as-milled powder at temperatures above 950℃. The nitrides NdFe V Ti N retain the same structure as their parent 10.5+0.5xV1.5 (1+x) compounds. The nitride with high V content is more stable than that with low V content. Upon nitrogenation, the Curie temperature is enhanced from 150℃ to 180℃. In NdFe V Ti N T the values fall in the range 450~480℃. The hard magnetic properties 10.5+0.5xV1.5 (1-x)TixNy magnets have been assessed.
Mechanical alloying, ThMn type structure compound, Permanent magnetic property
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唐少龙, G. B. Ji, S. L. Tang, * B. X. Gu, and Y. W. Du
J. Phys. Chem. B 2004, 108, 8862-8865,-0001,():
-1年11月30日
Co-Pb nanowire arrays with an average diameter of 20nm and lengths up to several micrometers were grown in ordered anodic alumina templates using AC electrodeposition. The as-deposited samples were annealed at different temperatures. The structure and magnetic properties of Co-Pb nanowires were analyzed by X-ray diffraction and a vibrating sample magnetometer. We found that the sample annealed at 700℃ had large perpendicular coercivity Hc (as high as 2660 Oe) and high squareness (MR/Ms) (about 0.97), which was much larger than that of pure Co nanowires annealed at 700℃ (2170 Oe, 0.9). The change in coercivity and squareness associated with the microstructure was discussed.
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【期刊论文】Nonequilibrium phase transformation of NdFe 11 Ti compound during mechanical milling
唐少龙, S.L. Tanga, b, *, C.H. Wua, B.W. Wanga, X.M. Jina, G.S. Lia, B.Z. Dinga, Y.C. Chuanga
Journal of Magnetism and Magnetic Materials 188(1998)387-392,-0001,():
-1年11月30日
A nonequilibrium phase transformation in a stoichiometric NdFe11Ti compound during mechanical milling was monitored by the measurements of AC susceptibility, magnetization, X-ray di
Rare-earth intermetallic compounds, Nonequilibrium phase transformation, Mechanical milling
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【期刊论文】Nonequilibrium phase transformation of NdFe 11 Ti compound during mechanical milling
唐少龙, S.L. Tang a, b, *, C.H. Wu a, B.W. Wang a, X.M. Jin a, G.S. Li a, B.Z. Ding a, Y.C. Chuang a
Journal of Magnetism and Magnetic Materials 188(1998)387-392,-0001,():
-1年11月30日
A nonequilibrium phase transformation in a stoichiometric NdFe11Ti compound during mechanical milling was monitored by the measurements of AC susceptibility, magnetization, X-ray di
Rare-earth intermetallic compounds, Nonequilibrium phase transformation, Mechanical milling
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