Erbium--gallium (1/2) | 60874-25-1

• 英文名称: Erbium--gallium (1/2)
• 英文别名: erbium;gallane
• CAS: 60874-25-1
• 化学式: ErGa₂
• 分子量: 306.706
• InChiKey: ROPMUFCRPIDGNT-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：

  氢化铒 、 氢化镓 生成 Erbium--gallium (1/2)
  参考文献：
  名称：

  Er-Ga-As 系统中的固态相平衡

  摘要：

  摘要 采用粉末 X 射线衍射、电子探针微量分析和扫描电子显微镜，在 800 °C 下测定了 Er-Ga-As 固态平衡相图。在组成二元 Er-Ga 和 Er-As 化合物中未发现三元相，并且测得的固溶度非常有限，但 Er 5 Ga 3 除外，其显示出广泛的均匀性范围，其富含 As 的极限对应于式 Er 5 Ga 2 As。GaAs、ErAs 和金属镓形成三相区域，在相图的 GaAs 侧占主导地位。该三相区域的存在证实了之前的观察结果，即金属化合物 ErAs 在 GaAs 上是热力学稳定的，因此，由于晶格匹配，因此是外延接触的潜在候选者。Er-Ga-As相图的结果，由 Ho-Ga-As 图的实验测定证实，可以扩展到其他重稀土（Gd→Lu）和化学相关元素，如钪和钇。在轻稀土 (La → Sm) 的情况下，如 Pr-Ga-As 图的部分测定所证实的，富砷二元的出现在 600 °C 以下改变了三元图的底部。

  DOI：

  10.1016/0925-8388(93)90524-q

文献信息

• 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.
• Magnetic ordering in Er1−U Ga2 systems
  作者：P.E. Markin、N.V. Baranov、E.V. Sinitsyn

  DOI：10.1016/0921-4526(91)90671-z

  日期：1991.3

  The magnetic properties of Er(1-x)U(x)Ga2 intermetallic system single crystals with the hexagonal AlB2 type structure were studied.ErGa2 compound (x = 0) is a collinear antiferromagnet with [0 0 1] as easy axis and its Neel temperature (T(N)) is equal to 7.5 K. UGa2 is a ferromagnet with [1 0 0] as easy magnetisation direction, its Curie temperature is equal to 125 K.It is shown that the orientations of the easy axes of uranium and erbium subsystems are constant for the whole region of concentrations, but each subsystem has its own ordering temperature. Hence, the Er(1-x)U(x)Ga2 system has the orthogonal magnetic arrangement of erbium and uranium subsystems. The magnetic behaviour of an erbium subsystem can be analysed in the RKKY model taking into account only the difference of electronic concentrations for the different compositions. The magnetic behaviour of a uranium subsystem does not contradict the results of the RKKY calculations.
• Isothermal section of the Er–Cu–Ga ternary system at 973K
  作者：B. Belgacem、M. Pasturel、O. Tougait、S. Nouri、H. El Bekkachi、I. Péron、R. Ben Hassen、H. Noël

  DOI：10.1016/j.jallcom.2012.03.067

  日期：2012.8

  Phase relations in the Er-Cu-Ga ternary system have been established at 973 K by means of powder X-ray diffraction complemented by energy dispersive spectroscopy coupled to scanning electron microscopy. The isothermal section of the phase diagram comprises eight extensions of binaries into the ternary system, ErCu1-xGax (x <= 0.5), ErCu2-xGax (x <= 1.1), ErCu5-xGax (x <= 0.5), Er5CuxGa3-x (x <= 0.60), Er3CuxGa2-x (x <= 0.24), ErCuxGa1-x (x <= 0.10), ErCuxGa2-x (x <= 0.30) and ErCuxGa3-x (x <= 0.35), as well as six ternary intermediate phases, ErCuxGa2-x (0.4 <= x <= 0.7), Er14Cu51-xGax (5.5 <= x <= 11.0), ErCu5-xGax (0.8 <= x <= 2.3), Er2Cu17-xGax (4.9 <= x <= 8.0), ErCu12-xGax (5.7 <= x <= 6.7) and Er3CuxGa11-x (1.5 <= x <= 4.4), all deriving from binary structure-types. (C) 2012 Elsevier B.V. All rights reserved.