(dysprosium)Ni2 | 12175-27-8

• 物质功能分类: 无机化工 - 无机盐
• 分子结构分类: 无机化合物 - 均相金属化合物 - 金属间镧系化合物
• 英文名称: (dysprosium)Ni2
• 英文别名: dysprosium;nickel
• CAS: 12175-27-8
• 化学式: DyNi₂
• 分子量: 279.88
• InChiKey: JEDNIMOZCRYAMS-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.01
• 重原子数：
  3
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为反应物：
  描述：

  Lanthanum--nickel (1/2) 、 (dysprosium)Ni2 以 melt 为溶剂， 生成
  参考文献：
  名称：

  Magnetic properties and specific heat of Dy1−xLaxNi2 compounds

  摘要：

  Magnetic and specific heat measurements have been carried out on polycrystalline series of single-phase Dy1-xLaxNi2 (0 <= x <= 1) solid solutions. The compounds have a Laves-phase superstructure (space group F (4) over bar 3m) with the lattice parameter gradually increasing with decreasing Dy content. The samples with x <= 0.8 are ferromagnetic with curie temperature below 22K. At high temperatures, all solid solutions are Curie-Weiss paramagnets. The Debye temperature, phonon and conduction electron contribution as well as magnetic contribution to the heat capacity have been determined from specific heat measurements. The magnetocaloric effect was estimated from specific heat measurements performed in a magnetic field of 0.42 and 4.2T. (C) 2009 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.jmmm.2009.04.014
• 作为产物：
  描述：

  氢化镝(DyH3) 、 镍 以 melt 为溶剂， 生成 (dysprosium)Ni2
  参考文献：
  名称：

  不同氢压下C15 Laves相DyNi2氢致非晶化研究

  摘要：

  摘要 (1) 吸氢形成晶体 (c -) 和非晶态 (a -) DyNi 2 H x 的四种放热反应，(2) c -DyNi 2 H x 向 a -DyNi 2 H x 的转变，即氢-诱导非晶化 (HIA)，(3) DyNi 5 在 -DyNi 2 H x 中的沉淀和 (4) 剩余的无定形氢化物分解为 DyNi 5 和 BiF 3 -型 DyH 3 当 C15 Laves使用压差扫描量热计(PDSC)在2.0 MPa H 2 或更高的氢压力下加热相DyNi 2 。另一方面，(1) c - 和 a -DyNi 2 H x 的形成，(2) 部分 HIA 和 (3) a - 和 c -DyNi 2 H x 的混合物分解成 DyNi 5 和 DyH在低于 2.0 MPa H 2 时观察到 3（或 DyH 2 ）。在第一个放热峰同时形成 c - 和 a -DyNi 2 H x 的原因是局部温度升高是由于氢吸收形成

  DOI：

  10.1016/j.jallcom.2005.02.045

文献信息

• Mössbauer studies of hydrogen absorption in Dy, DyMn_{2}, DyFe_{2}, DyCo_{2}, and DyNi_{2}
  作者：R. Cohen、K. West、F. Oliver、K. Buschow

  DOI：10.1103/physrevb.21.941

  日期：——
• Role of lanthanum in modifying the magnetic state in RNi2 solid solutions with R = Tb, Dy, Ho
  作者：J. Ćwik、Y. Koshkid'ko、I. Tereshina、N. Kolchugina、K. Nenkov、A. Hackemer、J. Lyubina、T. Palewski、G.S. Burkhanov、M. Miller

  DOI：10.1016/j.jallcom.2015.07.014

  日期：2015.11

  Comparative analysis and generalization of the influence of La on the structural and magnetic properties of R1-xLaxNi2 (R = Tb, Dy, Ho) solid solutions is presented. All the studied R1-xLaxNi2 solid solutions solidify with the formation of a Laves-phase superstructure corresponding to the F (4) over bar 3m space group. The magnetic properties are dominated by rare earth interactions and the substitution of R atoms with La significantly modifies the magnetic behaviour of the R1-xLaxNi2 system. Replacing of magnetic R with the nonmagnetic La results in magnetic dilution leading to the weakening of exchange interactions and decrease of the ordering temperature. In the case of Tb1-xLaxNi2 and Dy1-xLaxNi2 the ferromagnetic properties are reduced as the lanthanum content increases to 80% and for Ho1-xLaxNi2 the ferromagnetic ordering is destroyed as the lanthanum content increases to the values above 80%. The magnetic transition in all the studied samples is of second order character. The Debye temperature, phonon and conduction electron contributions as well as a magnetic contribution to the heat capacity have been determined from heat capacity measurements. The magnetocaloric effect and the refrigerant cooling power for selected solid solutions was determined in magnetic fields up to 4.2 T. (C) 2015 Elsevier B.V. All rights reserved.
• Crystal field effects on polycrystalline (rare earth)Ni2 intermetallic compounds
  作者：M.R. Ibarra、J.I. Arnaudas、P.A. Algarabel、A. del Moral

  DOI：10.1016/0304-8853(84)90354-8

  日期：1984.12
• Vacancy motion in rare-earth-deficient<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi>R</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ni</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>Laves phases observed by perturbed angular correlation spectroscopy
  作者：M. Forker、P. de La Presa、S. Müller、A. Lindbaum、E. Gratz

  DOI：10.1103/physrevb.70.014302

  日期：——

  Rare-earth-deficient R1-xNi2 Laves phases, which reportedly crystallize in a C15 superstructure with ordered R vacancies, have been investigated by perturbed angular correlation (PAC) measurements of electric quadrupole interactions at the site of the probe nucleus Cd-111. Although Cd-111 resides on the cubic R site, a strong axially symmetric quadrupole interaction (QI) with frequencies nu(q)approximate to265-275 MHz has been found in the paramagnetic phases of R1-xNi2 with R=Pr,Nd,Sm,Gd. This interaction is not observed for the heavy R constituents R=Tb,Dy,Ho,Er. The fraction of probe nuclei subject to the QI in R1-xNi2, R=Pr,Nd,Sm,Gd, decreases from 100% at low temperatures to zero at T>300 K and 500 K for R=Sm,Gd and R=Pr,Nd, respectively. At T=100 K the QI is static within the PAC time window, but at T=200 K fluctuations with correlation times tau(C)<10(-6) s, have been detected. These observations can be explained consistently by two assumptions: (i) the mother isotope In-111 of the PAC probe Cd-111 constitutes an attractive potential for vacancies and (ii) the R vacancies in R1-xNi2 are highly mobile at temperatures T<300 K, which is incompatible with a static vacancy superstructure. The measurements indicate a decrease of the vacancy-probe binding energy from the light to the heavy R constituents of R1-xNi2. For R=Pr,Nd,Sm,Gd the binding energy is in the range 0.15-0.40 eV. The activation energy E-A for vacancy jumps near the probe derived from the temperature dependence of the nuclear spin relaxation at 200 Kless than or equal toTless than or equal to300 K is small. The values observed in different samples cover a range of 0.1 eVless than or equal toE(A)less than or equal to0.23 eV. The trial frequency w(0) of these jumps appears to be correlated to the activation energy: ln w(0)(MHz)approximate to58E(A)(eV). At high temperatures T>500 K nuclear spin relaxation related to vacancy hopping is observed in nearly all R1-xNi2. Auxiliary Cd-111 PAC measurements have been carried in Sc0.95Ni2, ScNi2, ScNi0.97, Gd2Ni17, GdNi5, GdNi3, and GdNi.
• Magnetic properties and magnetocaloric effect in Dy1−xScxNi2 solid solutions
  作者：J. Ćwik、T. Palewski、K. Nenkov、J. Lyubina、O. Gutfleisch、J. Klamut

  DOI：10.1016/j.jallcom.2010.06.192

  日期：2010.9

  X-ray diffraction, magnetization, magnetic susceptibility, and heat capacity data are reported for the solid solutions Dy1-xScxNi2 (0 <= x >= 1). All the Dy1-xScxNi2 solid solutions are single phase with the C15 cubic Laves phase superstructure. The alloys with x <= 0.8 are ferromagnets with a low (below 22 K) Curie temperature that decreases from 21.1 K for DyNi2 to 4.5 K for Dy0.2Sc0.8Ni2. Dy0.1Sc0.9Ni2 and ScNi2 have no long-range magnetic order down to 2K. At high temperatures, all the Dy1-xScxNi2 solid solutions, except ScNi2, are Curie-Weiss paramagnets. The Debye temperature, phonon and conduction electron contributions as well as a magnetic contribution to the heat capacity have been determined from heat capacity measurements. The magnetocaloric effect for selected solid solutions was determined in magnetic fields up to 3 T. (c) 2010 Elsevier B.V. All rights reserved.