Results 21 to 30 of about 17,348 (202)

Magnetic frustration in lead pyrochlores [PDF]

Physical Review B, 2015
The rich phase diagrams of magnetically frustrated pyrochlores have maintained a high level of interest over the past 20 years. To experimentally explore these phase diagrams requires a means of tuning the relevant interactions. One approach to achieve this is chemical pressure, that is, varying the size of the non-magnetic cation. Here, we report on a
Hallas, A. M., Arevalo-Lopez, A. M., Sharma, A. Z., Munsie, T., Attfield, J. P., Wiebe, C. R., Luke, G. M.   +6 more
openaire   +2 more sources

The second phase transition in the pyrochlore oxide Cd2Re2O7 [PDF]

, 2002
Evidence for another phase transition at 120 K in the metallic pyrochlore oxide Cd2Re2O7, following the structural transition at 200 K and followed by the superconducting transition at 1.0 K, is given through resistivity, magnetoresistance, specific heat,
Hanawa M., Hiroi Z., Jin R., Sakai H., Singh D. J.   +4 more
core   +1 more source

Phase formation on the surface of lead ferroniobate depending on the conditions of mechanochemical synthesis and sintering [PDF]

Science of Sintering, 2016
The perovskite structure is formed at lower temperatures with an increase in the time of preliminary activation. It is demonstrated that thermal treatment of mechanically activated for 25 minutes mixture composed of niobium oxide, lithium ...
Gusev Aleksey Alekseevich, Raevski Igor Pavlovich, Avvakumov Evgeniy Grigorievich, Isupov Vitaliy Petrovich   +3 more
doaj   +1 more source

Structural Evolution and Magnetic Properties of Gd₂Hf₂O₇ Nanocrystals: Computational and Experimental Investigations

Molecules, 2020
Structural evolution in functional materials is a physicochemical phenomenon, which is important from a fundamental study point of view and for its applications in magnetism, catalysis, and nuclear waste immobilization.
Madhab Pokhrel, Nicholas Dimakis, Chamath Dannangoda, Santosh K. Gupta, Karen S. Martirosyan, Yuanbing Mao   +5 more
doaj   +1 more source

Universal geometric frustration in pyrochlores [PDF]

Nature Communications, 2018
AbstractMaterials with the pyrochlore/fluorite structure have diverse technological applications, from magnetism to nuclear waste disposal. Here we report the observation of structural instability present in the pyrochlores A2Zr2O6Oʹ (A = Pr, La) and Yb2Ti2O6Oʹ, that exists despite ideal stoichiometry, ideal cation-ordering, the absence of lone pair ...
Trump, BA, Koohpayeh, SM, Livi, KJT, Wen, J-J, Arpino, KE, Ramasse, QM, Brydson, R, Feygenson, M, Takeda, H, Takigawa, M, Kimura, K, Nakatsuji, S, Broholm, CL, McQueen, TM   +13 more
openaire   +4 more sources

XPS and NEXAFS Studies of Zn-Doped Bismuth Iron Tantalate Pyrochlore

Inorganics, 2023
The effect of Zn-doping on the phase composition and optical properties of the Bi2ZnxFe1-xTa2O9.5-Δ (x = 0.3, 0.5, 0.7) was studied. XRD data showed that the samples crystallize in the structural type of pyrochlore (sp. gr.Fd-3m). For all the samples, an
Sergey V. Nekipelov, Victor N. Sivkov, Danil V. Sivkov, Alexey M. Lebedev, Ratibor G. Chumakov, Aleksandra V. Koroleva, Boris A. Makeev, Nadezhda A. Zhuk   +7 more
doaj   +1 more source

A Novel Pyrochlore Ruthenate: Ca2Ru2O7 [PDF]

, 2006
Single crystals of a novel ruthenate, Ca2Ru2O7, were obtained. An X-ray diffraction study on a single crystal revealed that this material crystallizes in a pyrochlore structure with a lattice parameter, a = 10.197 Angstroms.
Aléonard R., Cox P. A., Felner I., Gardner J. S., Gingras M. J. P., Haas M. K., Hanawa M., Harris M. J., Hertz J. A., Higashinaka R., Hiroi Z., Hiroi Z., Hsu W. Y., Ishida K., Ishii F., Ito M., Kennedy B. J., Longo J. M., Maeno Y., Miyoshi K., Onoda S., Ramirez A. P., Ryden W. D., Sachdev S., Sakai H., Shimakawa Y., Subramanian M. A., Taguchi Y., Takeda T., Taniguchi T., Wang R., Yonezawa S., Yonezawa S., Yoshii S.   +33 more
core   +1 more source

Frustrated Quantum Rare-Earth Pyrochlores [PDF]

Annual Review of Condensed Matter Physics, 2019
In this review, we provide an introduction to the physics of a series of frustrated quantum rare-earth pyrochlores. We first give a background on the microscopic single- and two-ion physics of these materials, discussing the origins and properties of their exchange interactions and their minimal low-energy effective models before outlining what is ...
Rau, J., Gingras, M.
openaire   +3 more sources

Pressure-induced order–disorder transition in Gd1.5Ce0.5Ti2O7 pyrochlore [PDF]

Royal Society Open Science, 2019
An experimental study on ordered pyrochlore structured Gd1.5Ce0.5Ti2O7 (Fd3¯m) was carried out up to 45 GPa by synchrotron radiation X-ray diffraction and Raman spectroscopy.
Jingjing Niu, Xiang Wu, Haibin Zhang, Shan Qin   +3 more
doaj   +1 more source

The XPS study of the structure of uranium-containing ceramics [PDF]

Nuclear Technology and Radiation Protection, 2010
The samples of the (Ca0.5GdU0.5)Zr2O7 and (Ca0.5GdU0.5)(ZrTi)O7 ceramics with the fluorite and pyrochlore structures used as matrixes for the long-lived high-level radioactive waste disposal were studied with the X-ray photoelectron spectroscopy ...
Teterin Anton Yu., Maslakov Konstantin I., Teterin Yury A., Ivanov Kirill E., Livshits Tatyana S., Yudintsev Sergei V., Stefanovsky Sergei V., Lapina Mariya I.   +7 more
doaj   +1 more source