Holmium--manganese (1/2) | 12029-79-7

• 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: Holmium--manganese (1/2)
• 英文别名: holmium;manganese
• CAS: 12029-79-7
• 化学式: HoMn₂
• 分子量: 274.806
• InChiKey: ZGOFIYQATIUVJU-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：

  Holmium--manganese (1/2) 、 氘 以 neat (no solvent) 为溶剂， 生成
  参考文献：
  名称：

  Magnetic and hydrogen ordering in the frustrated Laves hydridesRMn2H4.5(R=Y,Gd, Tb, Dy, Ho): A neutron-diffraction study

  摘要：

  We have studied the magnetic and crystal structures of different Laves hydrides RMn2H4.5 (R = Y, Gd, Tb, Dy, Ho), having the cubic C15 structure at high temperature. We observe a strong coupling between the hydrogen and magnetic order in the frustrated Mn sublattice. The Neel temperature coincides with the ordering temperature in the hydrogen sublattice, resulting in a single magnetostructural transition. In contrast to the RMn2 compounds, in the hydrides the Mn-Mn magnetic interaction dominates and it imposes the magnetic order in the rare-earth sublattice. On the other hand, the anisotropy of the rare-earth ion strongly influences the orientation of the magnetic moments at low temperature. The Laves hydrides show a very unusual case where the structural and magnetic orders strongly interact with each other. They also offer many examples of the interplay between the localized Mn moments and the rare-earth moments. [S0163-1829(99)13213-2].

  DOI：

  10.1103/physrevb.59.9324
• 作为产物：
  描述：

  氢化钬 、 锰 生成 Holmium--manganese (1/2)
  参考文献：
  名称：

  系统中磁序的中子衍射研究

  摘要：

  使用中子粉末衍射研究了铸态立​​方化合物的磁性和晶体结构。样品显示出显着的不均匀性并且由至少两个 C15 型晶相组成。在以 (96.3%) 为主的第一阶段，亚铁磁长程有序是稳定的。细胞参数位于 7.49-7.52 A 的窄范围内的第二阶段显示了不相称的磁结构，其波矢量弱依赖于 x。观察到反铁磁类型的短程相关性以及长程排序。漫反射最大值位于与具有半整数指数的布拉格反射相对应的位置，并且归因于基于在大小为 A 的簇内开发的 MnO 型反铁磁结构的短程相关性。

  DOI：

  10.1088/0953-8984/10/50/014

文献信息

• Large reversible magnetocaloric effect in RMn2 (R=Tb, Dy, Ho, Er) compounds
  作者：Wenliang Zuo、Fengxia Hu、Jirong Sun、Baogen Shen

  DOI：10.1016/j.jallcom.2013.03.185

  日期：2013.10

  investigated. TbMn2 and DyMn2 crystallize in cubic Laves phase structure (C15 type), whereas HoMn2 and ErMn2 crystallize in hexagonal Laves phase structure (C14 type). For TbMn2 compound, the field-induced metamagnetic transition accompanying a spontaneous cell volume expansion is observed (inverse MCE), which leads to a large positive value (8.3 J kg � 1 K � 1 ) of magnetic entropy change around 36

  研究了 RMn2 (R = Tb、Dy、Ho、Er) 化合物的磁热效应 (MCE)。TbMn2 和 DyMn2 以立方 Laves 相结构（C15 型）结晶，而 HoMn2 和 ErMn2 以六方 Laves 相结构（C14 型）结晶。对于 TbMn2 化合物，观察到伴随自发细胞体积膨胀的场诱导变磁转变（逆 MCE），这导致在场下 36 K 附近磁熵变化的大正值（8.3 J kg 1 K 1 ） 0-1 T 的变化，而其他 RMn2 (R = Dy, Ho, Er) 化合物的磁熵变 (DSM) 和制冷剂容量 (RC) 的最大值为 15.7, 18.4, 25.5 J kg 1 K 1 和 403.6、404.3、316.0 J kg 1 在它们的 TC 周围，对于 0-5 T 的场变化，热和磁滞损耗分别可以忽略不计。
• Magnetic Characteristics of Laves Phase RMn₂ Compounds (R=Gd, Tb, Dy, Ho and Er)
  作者：Yoshikazu Makihara、Yoshikazu Andoh、Yuzo Hashimoto、Hironobu Fujii、Masahiro Hasuo、Tetsuhiko Okamoto

  DOI：10.1143/jpsj.52.629

  日期：1983.2
• NMR Study of Magnetic State of RMn₂Intermetallic Compounds. II. R=Heavy Rare-Earth
  作者：Kazuyoshi Yoshimura、Masayuki Shiga、Yoji Nakamura

  DOI：10.1143/jpsj.55.3585

  日期：1986.10.15
• Paramagnetic Properties of C15-Laves Phase RMn_<b>2</b>(<b><i>R</i>=<i>G</i><i>d</i></b>, Tb, Dy and Ho)
  作者：Kazuko Inoue、Hideto Imai

  DOI：10.1143/jpsj.66.224

  日期：1997.1.15

  The temperature dependence of magnetization and magnetic susceptibility of stable C15-Laves phase RMn(2) (R = Tb, Dy and Ho) has been measured from 77K to about 750K. It obeys the Curie-Weiss law. However, there is a change of the slope of inverse susceptibility near 400 similar to 500 K. The effective magnetic moments, especially those above the change of the slope, are nearly equal to g root J(J+1) of R(3+). The paramagnetic Curie temperatures at low temperatures are positive and change systematically with the lattice spacing, ascribed to the ferromagnetic RR interaction like those of C14-RMn(2). On the other hand, the paramagnetic Curie temperatures at high temperatures are negative. The temperature dependence of the susceptibility of C15-GdMn2 has also been measured and is discussed.
• Magnetic behavior of cubic laves phase RMn2 (rmR = Gd, DyandHo) compounds
  作者：S.K. Malik、W.E. Wallace

  DOI：10.1016/0304-8853(81)90095-0

  日期：1981.7