Cobalt;thulium | 12017-45-7

• 分子结构分类: 无机化合物 - 均相金属化合物 - 金属间过渡金属化合物
• 英文名称: Cobalt;thulium
• 英文别名: cobalt;thulium
• CAS: 12017-45-7
• 化学式: Co₂Tm
• 分子量: 286.921
• InChiKey: PAHQPFIKAZQZQC-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

• 作为产物：
  描述：

  氢化铥(III) 、 钴 以 neat (no solvent) 为溶剂， 生成 Cobalt;thulium
  参考文献：
  名称：

  稀土钴紫相化合物弹性特性的温度和磁场依赖性

  摘要：

  摘要 为了确定多晶稀土钴 Laves 相化合物 RCo2(R = Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er 和 Lu) 和 YCo2 在 4.2 和 300 K 之间。DyCo2 HoCo2 和 ErCo2 在 Tc 处表现出一阶跃迁。在 SmCo2 和 TbCo2 中，相变是二级相变，伴随着大的晶格软化。NdCo2、GdCo2 和 HoCo2 在低于 Tc 的低温下显示出从一个容易磁化方向到另一个磁化方向的自旋重定向。确定了外部磁场（高达 25 kOe）对这些 Laves 相的弹性特性的影响，即所谓的 ΔE 效应。SmCo2、TbCo2 和 DyCo2 在高达 25 kOe 的磁场中未达到饱和。

  DOI：

  10.1016/0022-3697(79)90015-5

文献信息

• The transport properties of RCo₂compounds
  作者：E Gratz、R Resel、A T Burkov、E Bauer、A S Markosyan、A Galatanu

  DOI：10.1088/0953-8984/7/33/008

  日期：1995.8.14

  The transport properties of intermetallic compounds RCo2 (R=Pr, Nd, Sm, Gd-Lu, Sc and Y) in the temperature range from 4.2 up to 1000 K were studied and different contributions were determined. In the non-magnetic compounds the spin fluctuation contribution to the electrical resistivity, rho sf varies as (T/Tsf)2, and thermal resistivity, Wsf varies as (T/Tsf), were found to follow the theoretical

  研究了金属间化合物 RCo2（R = Pr、Nd、Sm、Gd-Lu、Sc 和 Y）在 4.2 至 1000 K 的温度范围内的传输特性，并确定了不同的贡献。在非磁性化合物中，自旋波动对电阻率的贡献，rho sf 随 (T / Tsf) 2 变化，而热阻率 Wsf 随 (T / Tsf) 变化，符合理论预测。推导了由传导电子在 4f 矩上散射引起的自旋无序贡献，并发现它与 de Gennes 因子成正比。结果表明，自旋涨落是温度相关热电势低温特性的原因，而高温行为主要由状态密度函数决定。在居里温度附近的顺磁区，
• Study of the magnetic order in TmCo2 using a.c.-susceptibility measurements
  作者：R Resel、M Hedo、T Nakama、K Yagasaki、E Gratz、R Hauser、A.S Markosyan

  DOI：10.1016/0038-1098(95)00287-1

  日期：1995.9

  Abstract Low temperature a.c.-susceptibility measurements of the intermetallic compound TmCo 2 under various external magnetic fields up to 1.5 T are reported. Two magnetic phase transitions were found at the temperatures 3.4 and 3.8 K. The origins of the transitions are discussed on the basis of quadrupolar as well as magnetic interactions.

  摘要 报道了金属间化合物 TmCo 2 在高达 1.5 T 的各种外部磁场下的低温交流磁化率测量结果。在 3.4 和 3.8 K 温度下发现了两个磁相变。在四极相互作用和磁相互作用的基础上讨论了转变的起源。
• Gigantic increase in the Curie temperature of the R(Co1-xMnx)2 (R: heavy rare earths) systems at small Mn concentrations
  作者：R. Ballou、A.S. Markosyan、I.S. Dubenko、R.Z. Levitin

  DOI：10.1016/0304-8853(92)90034-l

  日期：1992.4

  Magnetic measurements on the R(Co1-xMnx)2 Laves phase systems with R = Gd, Tb, Dy, Ho, Er, Tm have been performed. A strengthening of the RCo2 ferrimagnetism shows up through a rapid increase at small Mn concentration x of the Curie temperature which reaches a maximum for x around 0.25. The results are interpreted by invoking the sole peculiarities of the d-magnetism keeping the R-R and R-d exchange integrals invariable on x.
• Positive magnetoresistivity in a localized-moment ferromagnet with itinerant spin fluctuations:<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">TmCo</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
  作者：T. Nakama、K. Shintani、K. Yagasaki、A. T. Burkov、Y. Uwatoko

  DOI：10.1103/physrevb.60.511

  日期：——

  Results on electrical resistivity and magnetization of TmCo2, intermetallic compound in magnetic fields up to 15 T and in temperature range from 1.5 K to 300 K are presented. In zero magnetic field two well-separated phase transitions are observed at low temperatures: at 3.7 K and at 3.3 K. Magnetoresistivity at temperatures below 3.3 K is negative. However at higher temperatures, magnetoresistivity is positive in a weak field, showing a maximum in the dependence on the magnetic field at H-max. H-max is found to be proportional to T-1.5 The maximum exists also in the temperature dependence of magnetoresistivity, measured at a constant external field H*. The results are interpreted in the framework of a model with two different contributions to magnetoresistivity: a negative one, related to the localized 4f magnetic moments of Tm, and a positive contribution associated with the features of the Co 3d band which are responsible for the itinerant metamagnetism of RCo2 compounds. The positive magnetoresistivity arises due to the spin polarization of the Co 3d band by the exchange field and enhancement of the spin fluctuations within this band. [S0163-1829(99)01425-3].
• Golosovsky; Kvyatkovsky; Sharygin, Journal of Magnetism and Magnetic Materials, 1997, vol. 169, # 1-2, p. 123 - 129
  作者：Golosovsky、Kvyatkovsky、Sharygin、Dubenko、Levitin、Markosyan、Gratz、Mirebeau、Goncharenkoe、Bouree

  DOI：——

  日期：——