Zobrazeno 1 - 10
of 101
pro vyhledávání: '"Aleksandr I. Chumakov"'
Publikováno v:
Journal of Synchrotron Radiation, Vol 29, Iss 6, Pp 1329-1337 (2022)
A synchrotron Mössbauer source (SMS) enables conventional (energy-domain) Mössbauer spectroscopy at synchrotron radiation facilities. In comparison with radioactive sources, SMS provides a beam of several micrometres in size, permitting studies of
Externí odkaz:
https://doaj.org/article/caa864f4989b4cadb3d235b31e6e486f
Autor:
Sergey V. Ovsyannikov, Maxim Bykov, Elena Bykova, Konstantin Glazyrin, Rudra Sekhar Manna, Alexander A. Tsirlin, Valerio Cerantola, Ilya Kupenko, Alexander V. Kurnosov, Innokenty Kantor, Anna S. Pakhomova, Irina Chuvashova, Aleksandr I. Chumakov, Rudolf Rüffer, Catherine McCammon, Leonid S. Dubrovinsky
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-11 (2018)
The charge order transition of commonly known magnetite has only recently been unraveled. Here, the measurement of the low-temperature high-pressure phase diagram of a related material (Fe4O5) elucidates the interplay of average oxidation state and c
Externí odkaz:
https://doaj.org/article/001b75cacfa74f56b513f450e93f57b6
Autor:
Claire I. O. Nichols, James F. J. Bryson, Roberts Blukis, Julia Herrero‐Albillos, Florian Kronast, Rudolf Rüffer, Aleksandr I. Chumakov, Richard J. Harrison
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 21, Iss 2, Pp n/a-n/a (2020)
Abstract Iron and stony‐iron meteorites form the Widmanstätten pattern during slow cooling. This pattern is composed of several microstructures whose length‐scale, composition and magnetic properties are dependent upon cooling rate. Here we focu
Externí odkaz:
https://doaj.org/article/db27a17e0fca49ab8dcdf55a89be8de0
Autor:
Hendrik Bernhardt, Annika T. Schmitt, Benjamin Grabiger, Berit Marx-Glowna, Robert Loetzsch, Hans-Christian Wille, Dimitrios Bessas, Aleksandr I. Chumakov, Rudolf Rüffer, Ralf Röhlsberger, Thomas Stöhlker, Ingo Uschmann, Gerhard G. Paulus, Kai S. Schulze
Publikováno v:
Physical Review Research, Vol 2, Iss 2, p 023365 (2020)
We report on the use of synthetic single-crystal diamonds for high definition x-ray polarimetry. The diamonds are precision mounted to form artificial channel-cut crystals (ACCs). Each ACC supports four consecutive reflections with a scattering angle
Externí odkaz:
https://doaj.org/article/15b22b4158b6438e8e1d7373f1dd2a1c
Autor:
Georgios Aprilis, Anna Pakhomova, Stella Chariton, Saiana Khandarkhaeva, Caterina Melai, Elena Bykova, Maxim Bykov, Timofey Fedotenko, Egor Koemets, Catherine McCammon, Aleksandr I. Chumakov, Michael Hanfland, Natalia Dubrovinskaia, Leonid Dubrovinsky
Publikováno v:
Minerals, Vol 10, Iss 6, p 542 (2020)
It is widely accepted that the lower mantle consists of mainly three major minerals—ferropericlase, bridgmanite and calcium silicate perovskite. Ferropericlase ((Mg,Fe)O) is the second most abundant of the three, comprising approximately 16–20 wt
Externí odkaz:
https://doaj.org/article/298db0c27a584dc4b54deb5d01493c57
Autor:
Dániel Géza Merkel, Gergő Hegedűs, Maria Gracheva, András Deák, Levente Illés, Attila Németh, Fernando Maccari, Iliya Radulov, Márton Major, Aleksandr I. Chumakov, Dimitrios Bessas, Dénes Lajos Nagy, Zsolt Zolnai, Sára Graning, Klára Sájerman, Edit Szilágyi, Attila Lengyel
Publikováno v:
ACS Applied Nano Materials. 5:5516-5526
Autor:
J. Łażewski, J. Kalt, Svetoslav Stankov, Małgorzata Sternik, Aleksandr I. Chumakov, Rudolf Rüffer, Tilo Baumbach, Jörg Göttlicher, Przemysław Piekarz, Paweł T. Jochym
Publikováno v:
Inorganic chemistry, 60 (13), 9571–9579
Using the density functional theory, we study the structural and lattice dynamical properties of europium sesquioxide ($Eu_{2}O_{3}$) in the cubic, trigonal, and monoclinic phases. The obtained lattice parameters and energies of the Raman modes show
Autor:
Caterina Melai, Tiziana Boffa-Ballaran, Laura Uenver-Thiele, Alexander Kurnosov, Aleksandr I. Chumakov, Dimitrios Bessas, Daniel J. Frost
In order to calculate the thermodynamic properties for recently discovered high-pressure mixed valence iron-oxides in the system Fe-Mg-O, information on the equation of state of precursor inverse spinel phases along the magnetite-magnesioferrite join
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b206a94ab98ece024860fcdd4b45c797
https://doi.org/10.21203/rs.3.rs-1584538/v1
https://doi.org/10.21203/rs.3.rs-1584538/v1
Autor:
Luca Faccincani, Valerio Cerantola, Fabrizio Nestola, Paolo Nimis, Luca Ziberna, Leonardo Pasqualetto, Aleksandr I. Chumakov, Jeffrey W. Harris, Massimo Coltorti
Thanks to the physical strength of diamonds and their relatively unreactive chemical nature, their mineral inclusions may remain exceptionally preserved from alteration processes and chemical exchanges with surrounding minerals, fluids and/or melts f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::740c9d24a870afca580d3842f453c3d7
https://hdl.handle.net/11368/3045839
https://hdl.handle.net/11368/3045839
Autor:
Aleksandr I. Chumakov, Catherine McCammon, Ilya Kupenko, E. Ercan Alp, Siân E. Dutton, Wenli Bi, Eran Greenberg, Mingda Lv, Susannah M. Dorfman, Jiachao Liu, Arnaud Magrez, Philippe Gillet, Robert J. Cava, V. Potapkin
Publikováno v:
American Mineralogist. 105:1030-1039
Electronic states of iron in the lower mantle's dominant mineral, (Mg,Fe,Al)(Fe,Al,Si)O3 bridgmanite, control physical properties of the mantle including density, elasticity, and electrical and thermal conductivity. However, the determination of elec