Magnetocaloric properties of TbN, DyN and HoN nanopowders prepared by the plasma arc discharge method
作者:K. P. Shinde、S. H. Jang、J. W. Kim、D. S. Kim、M. Ranot、K. C. Chung
DOI:10.1039/c5dt03528g
日期:——
We report for the first time the synthesis of nanopowders of TbN, DyN and HoN crystallized in a cubic structure by the plasma arc discharge (PAD) method and investigate their magnetocaloric properties for magnetic refrigeration applications.
structures of DyN–ZrN solidsolutions. ZrN and AlN have typical phase separation systems, undergoing chemical segregation into ZrN-rich and AlN-rich domains. However, the phase separation of DyN–ZrN has not been investigated. We performed the nanoscale structural analysis to clarify the phase separation in DyN–ZrN by combining X-ray absorption fine structure and high-energy X-ray diffraction. Consequently
我们进行了各种同步加速器 X 射线测量,以提取 DyN-ZrN 固溶体的局部结构和平均结构。 ZrN 和 AlN 具有典型的相分离系统,发生化学偏析,形成富含 ZrN 的区域和富含 AlN 的区域。然而,DyN-ZrN 的相分离尚未得到研究。我们结合 X 射线吸收精细结构和高能 X 射线衍射进行了纳米级结构分析,以阐明 DyN-ZrN 中的相分离。因此,在平均结构和局部结构中观察到表明相分离的不连续性。结果表明,由于晶体结构的差异,它不同于传统的相分离机制。 DyN-ZrN固溶体具有岩盐型立方晶体结构,存在金属位点的化学顺序和氮位点的键长分布等不稳定性。发生相分离以减少这些结构不稳定性。
Synthesis, structure and properties of RNiBN (R = rare-earth elements)
作者:Shi-jie Song、Bai-Zhuo Li、Qin-Qing Zhu、Zhi Ren、Guang-Han Cao
DOI:10.1016/j.jallcom.2023.172491
日期:2024.1
We report the structural and physical properties of new nitridoborates NiBN ( = Nd, Sm, Gd, Tb, Dy, Ho, and Er). These compounds crystallize in a tetragonal LaNiBN-type structure with two-dimensional NiB and N layers. The physical properties measurements indicate that they are antiferromagnetic metals. For = Gd and Ho, a successive magnetictransition was observed below N é el temperature, possibly
我们报告了新型硝基硼酸盐 NiBN(= Nd、Sm、Gd、Tb、Dy、Ho 和 Er)的结构和物理性质。这些化合物结晶为具有二维 NiB 和 N 层的四方 LaNiBN 型结构。物理特性测量表明它们是反铁磁金属。对于 = Gd 和 Ho,在 Néel 温度以下观察到连续的磁转变,这可能与 Ruderman-Kittel-Kasuya-Yosida 相互作用导致的自旋重新定向有关。在 = Er 和 Ho 化合物中测量到巨磁热效应,该效应与场诱导的从反铁磁态到铁磁态的一级变磁转变有关。我们的结果表明 NiBN(= Er 和 Ho)可能是低温磁制冷的有希望的候选者
Probing the Self-Assembly Mechanism of Lanthanide-Containing Sandwich-Type Silicotungstates [{Ln(H<sub>2</sub>O)<sub><i>n</i></sub>}<sub>2</sub>{Mn<sub>4</sub>(B-α-SiW<sub>9</sub>O<sub>34</sub>)<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>}]<sup>6–</sup> Using Time-Resolved Mass Spectrometry and X-ray Crystallography
作者:Lin-Yuan Fan、Zheng-Guo Lin、Jie Cao、Chang-Wen Hu
DOI:10.1021/acs.inorgchem.5b02800
日期:2016.3.21
rearrangement of divant anion [γ-SiW10O36]8– into the sandwich-type POM 6a via an intermediate species [Mn3(B-β-SiW8O30(OH))(B-β-SiW9O33(OH))(H2O)]12– (7a, Mn3(SiW8)(SiW9)}) from ESI-MS results, but also to gain the solid-state structures of intermediate and final product isolated from reaction solutions from X-ray crystallography results, from which the self-assembly mechanism of the lanthanide-containing
The optical and electrical properties of the rare‐earthnitrides DyN, ErN, and HoN as well as ScN and YN have been surveyed. From absorption edges found in the optical transmission curves, energy gaps in the 2‐eV range were determined as follows: DyN 2.60–2.90 eV, ErN 2.40–2.78 eV, HoN 1.70–1.88 eV, where the spread in energies is due to differences observed in two experimental runs. For ScN and YN