稀土学报(英文版), 2017, 35(1): 71-78.
10.1016/S1002-0721(16)60176-X
The effect of the Ni/Cu substitution on the electrical resistivity and microstructure of the polycrystalline GdNi5–xCux series was studied. The value of temperature of phase transition (Tph) estimated from temperature dependence of electrical resistancevaried non-linearly across copper doping from 32.5 K (x=0.0) to 29.1 K (x=5.0). The value of residual resistivity (ρo) estimated at low tem-perature range decreased from 27.28μΩcm (x=0.0) to 9.44μΩcm (x=5.0), which was discussed as the influence of microstructure. In order to describe the temperature dependence of resistivityρ(T) a variety of approaches were applied due to different scattering mechanisms occurring at high and low temperature ranges. The change withinρ(T) curvature was evidenced at low temperature range across copper doping. The temperature variation of the resistivity was quite peculiar for Cu-rich compounds (x=4.8,x=5.0), which might be correlated with the incommensurate magnetic structure derived from the weakly negative interaction between the nearest neighbours of Gd. The correlation between microstructure and resistivity was observed.
参考文献：
[1] Tung LD.;Franse JJM.;Brommer PE.;Duijn HGM.;Bruck E. Thuy NP.;Buschow KHJ..Magnetic and electrical properties of the pseudo-binary GdCu5-xAlx compounds[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,19981/2(1/2):17-24.
[2] Burzo E.;Chioncel L.;Neumann M.;Chiuzbaian SG..Magnetic and electronic properties of the LaNi5-xCux system[J].Journal of Physics. Condensed Matter,200027(27):5897-5904.
[3] M.Coldea;S.G.Chiuzbaian;M.Neumann.MAGNETIC AND ELECTRONIC PROPERTIES OF GdNi_5-xAl_x INTERMETALLIC COMPOUNDS[J].Acta Physica Polonica, A. General Physics, Physics of Condensed Matter, Optics and Quantum Electronics, Atomic and Molecular Physics, Applied Physics,20005(5):629-632.
[4] Anna Bajorek;Grazyna Chelkowska;Artur Chrobak.Magnetic and transport properties of selected Yb_xGd_(1_x)Ni_5 intermetallics[J].Intermetallics,2013:384-393.
[5] V. I. Grebennikov;T. V. Kuznetsova;A. G. Kuchin.Resonant Photoemission Spectroscopy Study of the d and f States in GdNi+(5-x)Cu_x Intermetallics[J].Bulletin of the Russian Academy of Sciences. Physics,20151(1):134-138.
[6] Poudyal, N.;Ping Liu, J..Advances in nanostructured permanent magnets research[J].Journal of Physics, D. Applied Physics: A Europhysics Journal,20134(4):043001-1-043001-23.
[7] Tolinski T.;Kowalczyk A.;Ivanov V..Electrical resistivity of RNi4B compounds (R = Y or rare earth)[J].Physica status solidi, B. Basic research,20031(1):153-159.
[8] I. Debiec;G. Chelkowska.Magnetic, electric and XPS study of Tb(Co_(1-x)Ga_x)_2 compounds[J].Journal of Magnetism and Magnetic Materials,20031/2(1/2):73-77.
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