本文用同步辐射X射线衍射方法研究了Ho_2 Ti_2 O_7、Er_2 Ti_2 O_7和Yb_2 Ti_2 O_7烧绿石的（002）衍射峰，以确定是否由于它们的烧绿石结构偏离Fd-3 m对称性而出现了在烧绿石空间群Fd-3 m中被禁戒而在单晶中子散射测量中观察到的（002）峰。对精确合成的化学计量比和非化学计量比粉末以及Ho 2 Ti 2 O 7的压碎浮区晶体进行的同步辐射衍射测量表明，在所有情况下，最强X射线衍射峰的灵敏度约为30，000分之一时，（002）反射都不存在。这高灵敏度地表明，这些稀土钛酸盐高温超导体的结构空间群为Fd-3 m，因此在中子散射实验中观察到的（002）峰具有非结构起源。给出了轻填充Ho ~（2+）_xTi ~（2-x）O_7的晶胞参数和内部应变。
英文摘要：
The Ho2Ti2O7, Er2Ti2O7 and Yb2Ti2O7 pyrochlores were studied by synchrotron X-ray diffraction to determine whether the (002) peak, forbidden in the pyrochlore space group Fd-3m but observed in single crystal neutron scattering measurements, is present due to a deviation of their pyrochlore structure from Fd-3m symmetry. Synchrotron diffraction measurements on precisely synthesized stoichiometric and non-stoichiometric powders and a crushed floating zone crystal of Ho2Ti2O7 revealed that the (002) reflection is absent in all cases to a sensitivity of approximately one part in 30,000 of the strongest X-ray diffraction peak. This indicates to high sensitivity that the structural space group of these rare earth titanate pyrochlores is Fd-3m, and that thus the (002) peak observed in the neutron scattering experiments has a non-structural origin. The cell parameters and internal strain for lightly stuffed Ho2+xTi2-xO7 are also presented.
The pyrochlore Ho2Ti2O7: Synthesis, crystal growth and stoichiometry
我们研究了合成和生长条件对烧绿石氧化物钛酸钬的磁性、结构和组成性质的影响，并证明了一种生长高质量化学计量比单晶的方法。在不同温度下合成了一系列具有不同Ti含量的多晶样品（-0.08 \leqslant x \leqslant 0.08，标称成分为Ho 2 Ti 2 + x O 7），并使用粉末X射线衍射进行表征。结果表明，在1500 °C的较高温度下合成粉末产生单相化合物。缺Ti粉末由于填充（Ho进入Ti位置）而显示晶格常数增加，而富Ti粉末由于反填充（Ti进入Ho位置）而显示晶格常数减小。发现在O2中的后退火对于完成抗填充过程是必要的。传统的浮区（FZ）技术的使用引入Ti不足，填充，和氧空位在生长的晶体。报道了用移动溶剂浮区法生长高结构质量、化学计量比的Ho_2Ti_2O_7单晶。交流磁化率的测量结果表明，化学计量比的晶体显示出较高的冰冻结温度，表明晶体质量和化学计量比起着关键的作用，该化合物的低温自旋冰性能。
Confirmation of the monoclinic Cc space group for the ground state phase of Pb(Zr0.525Ti0.475)O3 (PZT525): A Combined Synchrotron X-Ray and Neutron Powder Diffraction Study
Kinematical and dynamical contrast of dislocations in thick GaN substrates observed by synchrotron-radiation X-ray topography under six-beam diffraction conditions
Study of the Mechanical Behavior of the Hydride Blister/Rim Structure in Zircaloy-4 using in-situ Synchrotron X-ray Diffraction
利用高能同步加速器X射线衍射研究了在材料一个表面附近具有氢化物边缘/气泡结构的Zircaloy-4材料中的f. c. $δ$ -氢化物相、具有六方C14 lave相的金属间沉淀物和$α$相在200 \si{\degreeCelsius}的原位单轴拉伸实验中的机械响应。f.c. c $δ$是在边缘/泡罩结构中观察到的唯一氢化物相。采用传统的Rietveld精化方法计算了三相的宏观应变等效响应。在施加的载荷与晶格应变测量中描绘了两个区域：线性弹性应变区域和表现出载荷分配的区域。通过von Mises分析定量负载分配。观察到这三相在200 \si{\degreeCelsius}下具有相似的弹性模量。
Antiferrodistortive Phase Transition in Pseudorhombohedral (Pb0.94Sr0.06)(Zr0.550Ti0.450)O3 : A Combined Synchrotron x-ray and Neutron Powder Diffraction Study
A high resolution synchrotron x-ray powder diffraction study of the incommensurate modulation in the martensite phase of Ni2MnGa: Evidence for nearly 7M modulation and phason broadening
Toward the theoretically observable limit of electron density distribution by single-crystal synchrotron X-ray diffraction: The case of orbitally ordered Ti-3d^1 in YTiO_3
Dynamic evolution of internal stress, grain growth, and crystallographic texture in arc-evaporated AlTiN thin films using in-situ synchrotron x-ray diffraction
Microscale stress-geometry interactions in an additively manufactured NiTi cardiovascular stent: A synchrotron dual imaging tomography and diffraction study
Combining Synchrotron X-ray Diffraction, Mechanistic Modeling, and Machine Learning for In Situ Subsurface Temperature Quantification during Laser Melting
Absence of Structural Impact of Noble Nanoparticles on P3HT: PCBM Blends for Plasmon Enhanced Bulk-Heterojunction Organic Solar Cells Probed by Synchrotron Grazing Incidence X-Ray Diffraction
Evidence for a tricritical point coinciding with the triple point in (Pb0.94Sr0.06)(ZrxTi1-x)O3 : A combined synchrotron x-ray diffraction, dielectric and Landau theory study
Effect of Niobium Doping on the Crystal Structure and Hydrogen Sorption Properties of TiFe: Combined Synchrotron X-ray Diffraction and Extended X-ray Absorption Fine Structure Study
University of Stavanger（斯塔万格大学）；Institute for Energy Technology（能源技术研究所）
In situ synchrotron X-ray diffraction study of flash austenitization and process design insights in medium-Manganese steels for energy applications
University of Kassel（卡塞尔大学）；Technische Universität Bergakademie Freiberg（弗莱贝格工业大学）；Karlsruhe University of Applied Sciences (HKA)（卡尔斯鲁厄应用科学大学）；Karlsruhe Institute of Technology (KIT)（卡尔斯鲁厄理工学院）
Operando study of the evolution of peritectic structures in metal solidification by quasi-simultaneous synchrotron X-ray diffraction and tomography
University of Hull（赫尔大学）；Westlake University（西湖大学）；Diamond Light Source Ltd.（钻石光源有限公司）；Research Complex at Harwell（哈韦尔研究综合体）；Kunming University of Science and Technology（昆明理工大学）
Synchrotron x-ray diffraction and DFT study of non-centrosymmetric EuRhGe3 under high pressure
Institute of Physics（物理研究所）；Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides（巴黎萨克雷大学、法国国家科学研究中心、固体物理实验室）；Department of Physics, Faculty of Science, University of Zagreb（萨格勒布大学理学院物理系）；Institute of Low Temperature and Structure Research, Polish Academy of Sciences（波兰科学院低温与结构研究所）；Synchrotron SOLEIL（SOLEIL同步辐射中心）；Department of Earth Sciences, Department of Physics and Astronomy, University of Western Ontario（韦斯顿安大略大学地球科学系、物理与天文学系）
Comprehensive determination of Burgers vectors of threading dislocations in GaN substrates by combining reflection and transmission synchrotron-radiation x-ray topography
Incorporation of Mn in Al$_{x}$Ga$_{1-x}$N probed by x-ray absorption and emission spectroscopy, high-resolution microscopy, x-ray diffraction and first-principles calculations
采用同步辐射X射线吸收和发射光谱技术，辅以高分辨透射电子显微镜方法和密度泛函理论计算，研究了Al含量高达100%的Al $_{x}$ Ga $_{1-x}$ N：Mn样品中Mn的影响。Mn的原子和电子结构与其局域环境和价态一起建立。Al浓度高达82%的Al $_{x}$ Ga $_{1-x}$ N：Mn得到了一种没有沉淀的稀合金，并证实了Mn在外延过程中的表面活性剂作用。
Advanced Non-Destructive in Situ Characterization of Metals with the French Collaborating Research Group D2AM/BM02 Beamline at the European Synchrotron Radiation Facility
