Copper--ytterbium (5/1) | 12310-81-5

• 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: Copper--ytterbium (5/1)
• 英文别名: copper;ytterbium
• CAS: 12310-81-5
• 化学式: Cu₅Yb
• 分子量: 490.77
• InChiKey: OIUVKWHRKGQSMW-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.01
• 重原子数：
  6
• 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：

  铜 、 氢化镱 以 melt 为溶剂， 生成 Copper--ytterbium (5/1)
  参考文献：
  名称：

  系列中光学响应的​​演变

  摘要：

  摘要 从远红外到紫外和低温下的光学测量被用来研究YbCu 5-x Au x 系列内近藤晶格行为的演变。在 YbCu 5 光谱的低能部分观察到重费米子（Kondo 晶格）特征，类似于同构 YbCu 4 Ag 的数据，但向自由载流子行为的最低频率转变（与较低的TK 值）。通过移动到具有越来越多的 Au 原子取代 Cu 原子的样品，可以观察到三种效应：杂化间隙的闭合，由典型结构的光导率红移所标记；越来越多的扩大效应，可能与化学计量无序有关；约 3.5 meV 的振动结构消失，

  DOI：

  10.1016/j.physb.2006.01.268

文献信息

• Crossover from First-Order Valence Transition to Kondo Behavior in C15b-Type YbCu_{<b>5-<i><i>x</i></i></b>}In_{<i><i>x</i></i>}System
  作者：Junhui He、Naohito Tsujii、Kazuyoshi Yoshimura、Koji Kosuge、Tsuneaki Goto

  DOI：10.1143/jpsj.66.2481

  日期：1997.8.15

  the first-order valence transition in YbCu 4 In shifts to higher temperature and becomes broadened significantly with decreasing In-content, and simultaneously the delocalized mixed-valent state of Yb ion ( x =1) shows a continuous change toward the localized trivalent state ( x =0). The electrical resistivities of YbCu 5- x In x display various temperature-dependencies: ranging from a pronounced drop

  YbCu 5 和YbCu 4 In在In浓度范围0.1≤ x ≤1内形成具有立方AuBe 5 型(C15b)结构的固溶体(YbCu 5- x In x )；在x=0.1以下，常压下与六方CaCu 5 型YbCu 5 相共存。磁化率和高场磁化强度测量表明，YbCu 4 In 中的一级价跃迁移至较高温度并随着 In 含量的降低而显着展宽，同时 Yb 离子的离域混合价态 ( x = 1 ) 显示向局部三价态 (x = 0) 的连续变化。YbCu 5- x In x 的电阻率显示出各种温度依赖性：从 x =1 处的显着下降，通过 0.4≤ x ≤0.7 的最小行为，到 x 的负对数增加行为 (-ln T ) ≤0.3。以上结果表明 YbCu 5- x In x 经历了从价波动系统到 dence Kondo 系统的交叉，随着 x 的减小。在 x = 0 时，Kondo la 的形成...
• Evolution of optical response in the series
  作者：Franco Marabelli、Matteo Galli、Marco Moscardini、Ernst Bauer

  DOI：10.1016/j.physb.2006.01.268

  日期：2006.5

  Abstract Optical measurements from the far infrared to ultraviolet and at low temperature are used to study the evolution of Kondo lattice behaviors within the series YbCu 5 - x Au x . Heavy fermion (Kondo lattice) features have been observed in the low energy part of the spectrum of YbCu 5 , resembling the data of the isostructural YbCu 4 Ag , but for a shift towards the lowest frequencies of the

  摘要 从远红外到紫外和低温下的光学测量被用来研究YbCu 5-x Au x 系列内近藤晶格行为的演变。在 YbCu 5 光谱的低能部分观察到重费米子（Kondo 晶格）特征，类似于同构 YbCu 4 Ag 的数据，但向自由载流子行为的最低频率转变（与较低的TK 值）。通过移动到具有越来越多的 Au 原子取代 Cu 原子的样品，可以观察到三种效应：杂化间隙的闭合，由典型结构的光导率红移所标记；越来越多的扩大效应，可能与化学计量无序有关；约 3.5 meV 的振动结构消失，
• Asymmetry of point-contact characteristics of RECu5 (RE: heavy rare earth) compounds
  作者：Sergej Iľkovič、Marian Reiffers、Bogdan Idzikowski、K.H. Müller

  DOI：10.1016/j.jmmm.2007.02.178

  日期：2007.9

  Abstract We present the study of an asymmetry of point-contact characteristics of the heterocontacts RECu 5 –Cu (RE=Tb, Dy, Ho, Er, Tm and Yb). Point-contact spectroscopy, in the case of normal metals, gives direct information about the electron–quasiparticle interaction (EQI). We have determined the asymmetry and have explained its origin within model taking into account the thermopower effects.

  摘要 我们研究了异质触点 RECu 5 –Cu（RE=Tb、Dy、Ho、Er、Tm 和 Yb）的点接触特性的不对称性。对于普通金属，点接触光谱法可提供有关电子-准粒子相互作用 (EQI) 的直接信息。我们已经确定了不对称性，并在考虑到热电效应的情况下解释了它在模型中的起源。
• Systematic composition dependence in YbCu5−xAux from dense Kondo to antiferromagnetic system through quantum critical point around x=0.2–0.4
  作者：Kazuyoshi Yoshimura、Takashi Kawabata、Nobutaka Sato、Naohito Tsujii、Taichi Terashima、Chieko Terakura、Giyuu Kido、Koji Kosuge

  DOI：10.1016/s0925-8388(00)01371-2

  日期：2001.4

  Temperature and magnetic field variations of the electric resistivitiy (rho) as well as temperature dependence of the magnetic susceptibility (chi) are reported for the YbCu5-chiAuchi system with the C15b-type structure. These results indicate a systematic composition dependence from dense Kondo to RKKY antiferromagnetic system via quantum critical point with x=0.2-0.4. The logarithmic temperature dependence of rho was observed in the middle temperature range for all the compositions, implying that the incoherent Kondo scattering is dominant in this T-region. With decreasing temperature, the p tends to saturate, makes a maximum, then decreases toward the Fermi liquid ground state due to the coherent dense Kondo effect (x<0.2), or toward the antiferromagnetic ground state due to the RKKY interaction (for x>0.4). The non-Fermi liquid behavior was observed around the quantum critical composition (x=0.2-0.4). (C) 2001 Elsevier Science B.V. All rights reserved.
• Preparation of cubic AuBe5-type YbCu5−Al (0≤x≤0.5) under high pressure and their Kondo behavior
  作者：J. He、N. Tsujii、K. Yoshimura、K. Kosuge

  DOI：10.1016/s0925-8388(97)00579-3

  日期：1998.3

  Cubic AuBe5-type YbCu5-xAlx (0 less than or equal to x less than or equal to 0.5) has been prepared for the first time under a pressure of 1.5 GPa and at 650 degrees C. Magnetic susceptibility measurements indicate that cubic YbCu5-xAlx exhibits Curie-Weiss behavior down to 4 K, except for YbCu5 that displays a maximum at 10 K due to Fermi liquid formation. The Yb ion in this system is found to be in a stable trivalent state (4f(13), J=7/2) with a localized moment close to 4.54 mu(B) of free Yb3+ ion. Contrary to the consistent magnetic behavior, the temperature dependence of electrical resistivities of YbCu5-xAlx displays a systematic transition from a typical Fermi liquid behaviour rho(T)proportional to T-2 (x less than or equal to 0.1) to a Kondo impurity behavior p(T)proportional to-log T (x greater than or equal to 0.3). The characteristic Kondo temperature T-K is largely lowered during this crossover. (C) 1998 Elsevier Science S.A.