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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chzhan A. V., Patrin G. S., Kiparisov S. Ya., Seredkin V. A., Pal'Chik M. G., Burkova L. V.
Заглавие : Magnetic and magnetooptical properties of nanothick polycrystalline Co-P films
Место публикации : Bull. Russ. Acad. Sci.: Phys. - 2012. - Vol. 76, Is. 2. - P.180-182. - ISSN 1062-8738, DOI 10.3103/S106287381202027X
Примечания : Cited References: 9
Ключевые слова (''Своб.индексиров.''): co films--film surface morphology--magnetic and magneto-optical properties--magnetic polarizations--magneto-optical faraday effect--polycrystalline--specific values--underlayers--faraday effect--metallic films--phosphorus--cobalt
Аннотация: Features of the formation of chemically deposited polycrystalline Co-P films with nanometer thicknesses are established by magnetic measurements and analysis of film surface morphology. It is found that the specific value of the magnetooptical Faraday effect in Co-P films exceeds that in Co films by a factor of more than two. This is attributed to the magnetic polarization of a Pd underlayer. It is shown the Kerr effect in Co films is negligibly influenced by the embedding of phosphorus. © 2012 Allerton Press, Inc.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Yaroslavtsev R. N., Chekanova L. A., Komogortsev S. V., Iskhakov R. S.
Заглавие : Effect of sodium hypophosphite content to the deposition rate, structure and magnetic properties of electroless deposited Ni-P alloy
Коллективы : Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism
Место публикации : Solid State Phenom.: Selected, peer reviewed papers/ ed.: S. G. Ovchinnikov, A. Samardak: Trans Tech Publications, 2014. - Vol. 215: Trends in Magnetism: Nanomagnetism (EASTMAG-2013). - P.237-241. - ISSN 978-303835054-5, DOI 10.4028/www.scientific.net/SSP.215.237. - ISSN 1662-9779
Примечания : Cited References: 15
Ключевые слова (''Своб.индексиров.''): electroless coatings--nickel-phosphorus alloy
Аннотация: The deposition kinetics, structure and magnetic properties of electroless deposited films Ni-P were investigated depending on the amount of sodium hypophosphite in the electroless bath. It was found that the film deposition rate is linear and unambiguously varies with the hypophosphite content from 2 to 13 g/l and from 23 to 25 g/l. The deposition rate varies widely in the hypophosphite concentration range from 13 to 23 g/l. The films are composed of amorphous Ni-P phase and fcc Ni-P solid solution with phosphorus content from 1 to 4 at.% P according to X-ray diffraction. The partial amount of amorphous phase is increased with concentration of sodium hypophosphite. The ferromagnetic resonance field is independent on the concentration of sodium hypophosphite, which assumes to be result from the laminated allocation of the amorphous and fcc phases in the film. © (2014) Trans Tech Publications, Switzerland.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Knyazev Yu. V., Platunov M. S., Ikkert O. P., Semenov S. V., Bayukov O. A., Nikolenko A. D., Nazmov V. P., Volochaev M. N., Dubrovskiy A. A., Molokeev M. S., Smorodina E. D., Balaev D. A., Karnachuk O. V.
Заглавие : Microbially mediated synthesis of vivianite by Desulfosporosinus on the way to phosphorus recovery
Колич.характеристики :15 с
Место публикации : Environ. Sci.: Adv. - 2024. - Vol. 3, Is. 6. - P.897-911. - ISSN 27547000 (eISSN), DOI 10.1039/D4VA00040D
Примечания : Cited References: 120. - This study was supported by the Russian Science Foundation, project no. 22-24-00601 (https://rscf.ru/project/22-24-00601/). The electron microscopy and Mössbauer studies were carried out on the equipment of the Krasnoyarsk Territorial Center for Collective Use, Krasnoyarsk Scientific Center, Siberian Branch of the Russian Academy of Sciences. The research contribution of M. S. P. was partially supported by the Ministry of Science and Higher Education of the Russian Federation within the governmental assignment for Synchrotron radiation facility “SKIF”, Boreskov Institute of Catalysis (project FWUR-2024-0040)
Аннотация: We explored the role of biomineralization in industrial waste sludge formation, using the laboratory cultivation of Desulfovibrio sp. OL sulfate reducing species isolated from the Komsomolsky waste sludge (Russia). The most frequently reported sulfate-reducing bacteria (SRB) biomineralization products are various iron sulfides. Here we present first studies of the products of Desulfosporosinus metallidurans, acidophilic SRB from acid mine drainage. We analyzed the biomineralized sample using X-ray diffraction, electron microscopy, X-ray absorption and Mossbauer spectroscopies, and magnetization measurements via First-Order Reversal Curve (FORC) diagram analysis. Our findings show that the biomineralization occurring under pure culture conditions leads to the formation of greigite (Fe3S4) nanorods, along with larger microbially mediated crystals of vivianite (Fe3(PO4)2·8H2O) and siderite (FeCO3). Energy dispersive X-ray spectroscopy revealed that the crystal sizes of vivianite and siderite were comparatively larger than those of the nanorod-shaped greigite. Transmission electron microscopy and Mossbauer spectroscopy detected ultrafine ferrihydrite (Fe2O3·nH2O) superparamagnetic nanoparticles with an average size of 2.5 nm. FORC analysis showed significant magnetic interactions among these nanoparticles, suggesting their potential for magnetic separation applications. The current study demonstrates that ferrihydrite nanoparticles have a strong magnetic affinity for other crystal phases produced by Desulfosporosinus metallidurans. Therefore, we believe that the investigated bacterial species can be exploited in advanced magnetic separation techniques. This offers a cost-effective and environmentally friendly method for purifying sediments in industrial waste sludge.
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