Gallium--holmium (2/1) | 12599-74-5

• 英文名称: Gallium--holmium (2/1)
• 英文别名: gallane;holmium
• CAS: 12599-74-5
• 化学式: Ga₂Ho
• 分子量: 304.376
• InChiKey: XQOOOGCSGAGANT-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -2.37
• 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

• 作为产物：
  描述：

  氢化钬 、 氢化镓 以 neat (no solvent) 为溶剂， 生成 Gallium--holmium (2/1)
  参考文献：
  名称：

  High-field magnetization in Ho1−Er Ga2 single crystals

  摘要：

  The hexagonal antiferromagnetic compounds HoGa2 and ErGa2 exhibit large anisotropy with two metamagnetic-like transitions in external magnetic fields applied along the easy direction: at 1.7 and 2.4 T along the alpha-axis for HoGa2, and at 0.7 and 2.0 T along the c-axis for ErGa2. Magnetization measurements in high fields up to 40 T have been performed on single crystals of the substituted compounds Ho1-xErxGa2 (x = 0, 0.2, 0.4 and 0.6). In HoGa2, above the metamagnetic transition fields, the a-axis magnetic moment increases slowly and reaches the value of 9.75 mu(B) at 40 T, whereas along the c-axis it sharply rises but to a much lower value, of 7 mu(B) only. In substituted compounds, besides the c-axis transition around 6 T, an additional transition appears at 18-19 T along the alpha-axis. The transition-field values were found to decrease slightly with increasing Er content for both transitions.

  DOI：

  10.1016/0304-8853(94)00960-0

文献信息

• The ternary Ho–V–Ga system at 750 °C, and new rare earth vanadium and chromium gallides
  作者：Yuriy Verbovytskyy

  DOI：10.1016/j.jallcom.2016.01.109

  日期：2016.5

  The ternary Ho–V–Ga phase diagram has been investigated at 750 °C by means of powder X–ray diffraction analysis and energy–dispersive X–ray spectroscopy. The studied system is characterized by the absence of detectable solubility for the binary compounds and by the existence of two new ternary phases, HoV 2 Ga 4 (YbMo 2 Al 4 structure type) and Ho 4 V 1– x Ga 12 (0 ≤ x 3 structure type). Isostructural

  摘要 通过粉末 X 射线衍射分析和能量色散 X 射线光谱法在 750 °C 下研究了三元 Ho-V-Ga 相图。所研究系统的特点是二元化合物没有可检测的溶解度，并且存在两个新的三元相，HoV 2 Ga 4（YbMo 2 Al 4 结构类型）和 Ho 4 V 1– x Ga 12（0 ≤ x 3 结构类型）。已发现 RE = Tb、Dy 和 Tm 的同构代表 REV 2 Ga 4 并确认 RE = Er。此外，还揭示了 RE = Gd-Tm 的新 RECr 4 Ga 8 相（与 ScFe 6 Ga 6 结构类型相关）的形成。已经简要讨论了 HoV 2 Ga 4 和 HoCr 4 Ga 8 化合物中原子的结构特性和相互作用。
• Baranov, N. V.; Markin, P. Ye.; Sinitsyn, Ye. V., Physics of Metals and Metallography, 1988, vol. 65/3, p. 109 - 117
  作者：Baranov, N. V.、Markin, P. Ye.、Sinitsyn, Ye. V.

  DOI：——

  日期：——
• Anisotropic magnetocaloric effect in ErGa2 and HoGa2 single-crystals
  作者：R.D. dos Reis、L.M. da Silva、A.O. dos Santos、A.M.N. Medina、L.P. Cardoso、F.C.G. Gandra

  DOI：10.1016/j.jallcom.2013.08.023

  日期：2014.1

  In this work we study the anisotropic magnetocaloric properties of ErGa2 and HoGa2 single-crystals. Both compounds present antiferromagnetic ordering below 10 K but with different easy axis as a result of the crystal field anisotropy. The single-crystal conventional MCE values are similar or in certain circumstances even larger than the results for the polycrystalline material. The anisotropic MCE was calculated by taking the difference of the entropy change of the easy and hard magnetization directions. For both compounds, the anisotropic variation of entropy is as large as the conventional entropy change obtained by sweeping the magnetic field up to 5 T. Particularly for ErGa2 an inverse MCE for a 3 T field oriented along the easy axis is obtained with similar magnitude of the 5 T MCE found for polycrystalline samples. The results show that by exploring anisotropic properties of the materials it is possible to obtain a significant MCE. From a technological point of view this can be an interesting alternative because the MCE is produced just by rotating the magnetic material under a constant magnetic field. (c) 2013 Elsevier B.V. All rights reserved.
• Markin, P. E.; Baranov, N. V., Journal of Alloys and Compounds, 1995, vol. 228, p. 53 - 58
  作者：Markin, P. E.、Baranov, N. V.

  DOI：——

  日期：——
• Structural phase transition of HoGa2 at high pressure
  作者：U Schwarz、S Bräuninger、Yu Grin、K Syassen、M Hanfland

  DOI：10.1016/s0925-8388(97)00594-x

  日期：1998.3

  We have investigated structural properties of HoGa2 under hydrostatic pressures up to 45 GPa using angle dispersive X-ray powder diffraction in combination with the diamond anvil cell technique. At 4(1) GPa we observed the onset of a first-order structural phase transition of the AlB2-type low-pressure phase which was associated with a 10% shortening of the c-axis and a 2.5% elongation of the a-axis. Both low-pressure and high-pressure modifications are characterized by 6(3) nets of gallium atoms. (C) 1998 Elsevier Science S.A.