Kazan state Federal University E-Archive :: Browsing by Author "Pyataev A."

Blue shift in optical absorption, magnetism and light-induced superparamagnetism in γ-Fe2O3 nanoparticles formed in dendrimer

Domracheva N.; Vorobeva V.; Gruzdev M.; Pyataev A. (2015)

© 2015, Springer Science+Business Media Dordrecht. Abstract: We are presenting the investigation of the optical, magnetic, and photoinduced superparamagnetic properties of single-domain γ-Fe2O3 nanoparticles (NPs) with ...

Coexistence of spin crossover and magnetic ordering in a dendrimeric Fe(III) complex

Vorobeva V.; Domracheva N.; Pyataev A.; Gruzdev M.; Chervonova U. (2014)

© 2015 AIP Publishing LLC. The magnetic properties of a new dendrimeric spin crossover Fe(III) complex, [Fe(L)2]+PF6, where L = 3,5-di[3,4,5-tris(tetradecyloxy) benzoyloxy]benzoyl-4-salicylidene-N-ethyl-N-ethylene-diamine, ...

Detailed EPR study of spin crossover dendrimeric iron(III) complex

Domracheva N.; Pyataev A.; Vorobeva V.; Zueva E. (2013)

The unusual magnetic behavior of the first dendritic Fe3+ complex with general formula [Fe(L)2]+Cl -·H2O based on a branched Schiff base has been investigated by electron paramagnetic resonance (EPR) and Mössbauer spectroscopy. ...

Fe–B nanomaterials by mechanochemical synthesis: A Mössbauer study

Kutashova E.; Pyataev A.; Shkodich N.; Rogachev A.; Scheck Y. (2019)

© 2019 Elsevier B.V. The process of phase formation during short-term (80 and 120 min) high-energy ball milling of Fe84B16, Fe80B20, and Fe70B30 powder mixtures was studied by Mössbauer spectroscopy. Hyperfine field Bhf ...

Heterogenous catalysts based on Fe-pillared clays for catalytic aquathermolysis processes of heavy oil

Starshinova V.; Abdelsalam Y.; Gorelysheva V.; Oparkin A.; Gnevashev S.; Pyataev A.; Khamidullin R.; Karalin E.; Shinkarev A. (2019)

© Published under licence by IOP Publishing Ltd. Aquathermolysis process is one of the key technologies of reducing the viscosity and exploitation of huge deposits of heavy crude oil. That process combines thermal and ...

Iron-containing poly(propylene imine) dendromesogens with photoactive properties

Domracheva N.; Morozov V.; Gruzdev M.; Manapov R.; Pyataev A.; Lattermann G. (2010)

Here, we report the first results of investigation the local structure and photoactive properties of iron-containing dendromesogens based on decyloxybenzoate substituted poly(propylene imine) dendrimers of the first to ...

Magnetic Properties of Novel Dendrimeric Iron(III) Complexes of the First Generation: EPR and Mössbauer Study

Domracheva N.; Vorobeva V.; Pyataev A.; Ivanova A. (2016)

© 2016, Springer-Verlag Wien.The magnetic properties of novel liquid-crystalline dendrimeric iron(III) complexes of the first generation, [Fe(L2)]+X−, where L = 3,4,5-tri(tetradecyloxy) benzoyloxy-4-salicyliden-N′-ethyl- ...

Magnetic properties of novel dendrimeric spin crossover iron(III) complex

Domracheva N.; Vorobeva V.; Pyataev A.; Tamura R.; Suzuki K.; Gruzdev M.; Chervonova U.; Kolker A. (2016)

© 2015 Elsevier B.V. All rights reserved. The synthesis and magnetic properties of novel dendrimeric spin crossover Fe(III) complex of formula [Fe(L)2]+PF6 -, where L = 3,5-di(3,4,5-tris(tetradecyloxy)benzoyloxy)benzoyl- ...

Magnetic resonance and Mössbauer studies of superparamagnetic γ-Fe 2O 3 nanoparticles encapsulated into liquid-crystalline poly(propylene imine) dendrimers

Domracheva N.; Pyataev A.; Manapov R.; Gruzdev M. (2011)

We present the first results of electron magnetic resonance (EMR) and Mössbauer spectroscopy studies of γ-Fe 2O 3 nanoparticles (NPs) incorporated into liquid-crystalline, second-generation dendrimers. The mean size of NPs ...

Moessbauer Study of Sphero-Conical Vessels from Bolgar

Ivanova A.; Nuretdinova A.; Pyataev A.; Valiulina S.; Voronina E. (2017)

© 2017, Springer Science+Business Media, LLC. Samples of sphero-conical vessels found in mass quantities in the ancient settlement Bolgar were analyzed by Moessbauer spectroscopy. Wares with relatively low annealing ...

Mössbauer investigations of magnetic system stratification in europium and thulium ferromanganites

Bashkirov S.; Boltakova N.; Parfenov V.; Nazipov R.; Pyataev A.; Gabidullin I. (2010)

Strontium-substituted ferromanganites of europium and thulium were investigated. Samples of Eu0.65Sr0.35Mn 1-xFexO3 and Tm0.65Sr 0.35Mn1-xFexO3 were prepared using ceramic processing. Based on the data from X-ray analysis, ...

Mössbauer spectra and magnetic properties of Tm0.65Sr 0.35Fe x Mn1 - X O3 (x = 0.3, 0.35, 0.4)

Parfenov V.; Pyataev A.; Nig'Matullina I.; Ibragimov S. (2013)

We report Mössbauer spectroscopy results for Tm0.65Sr 0.35Fe x Mn1 - x O3 (x = 0.3-0.4) at 300 and 80 K. Like in the case of lighter lanthanide ferromanganites, we observe phase separation of the magnetic sub- system: a ...

Mössbauer studies of Cu1-xNi xFeMnO4 spinel ferrites

Roumaih K.; Manapov R.; Sadykov E.; Pyataev A. (2005)

Nickel copper ferromanganites Cu1-xNi xFeMnO4 with the composition (0≤x≤1) have been prepared using a ceramic technique. A single phase of these compounds was confirmed by X-ray powder diffraction measurements. Mössbauer ...

Mössbauer Studies of Moulded Kama–Cis-Urals Ceramics

Valiulina S.; Pyataev A.; Ivanova A.; Manapov R.; Voronina E. (2018)

© 2018 University of Oxford The paper is devoted to the analysis of two genetically related groups of medieval traditional moulded ceramics, which in historical studies of the polyethnic Middle Volga and Kama region fulfil ...

Mössbauer study of non-stoichiometric FeCr2S4 system

Pyataev A.; Malikov I.; Voronina E.; Dulov E. (2020)

© 2019 Elsevier B.V. A partial spin transition stimulated by spontaneous symmetry breaking has been observed, for the first time, in the non-stoichiometric chalcogenide spinel FeCr2S4. A Fe2+ high spin - low spin transition ...

Mössbauer study of products of the thermocatalytic treatment of kerogen-containing rocks

Ivanova A.; Vakhin A.; Voronina E.; Pyataev A.; Nurgaliev D.; Sitnov S. (2017)

© 2017, Allerton Press, Inc. To understand the mechanism of highly efficient catalyst formation from precursors, the active form of an iron-containing catalyst and kerogen samples from the Bazhen formation are studied by ...

Mössbauer study of structurally ordered iron coordination compounds and polyurethanes crosslinked by them

Davletbaeva I.; Pyataev A.; Kalachev K.; Sadykov E.; Manapov R. (2006)

The structure of a metal-complex system based on ferric chloride and monoethanolamine and the products of interaction of this system with ε-caprolactam and a urethane prepolymer was studied by Mössbauer spectroscopy. It ...

Mössbauer study of the process of the room-temperature aging of the alloy Cu79Ni14Fe7

Pyataev A.; Manapov R. (2011)

Mössbauer spectroscopy was used to investigate the initial stage of the phase separation in the quasi-binary system Cu79Ni 14Fe7 and the subsequent transformation of the alloy structures as a result of prolonged aging at ...

Mössbauer study of the surface of core-shell type nanoparticles

Abdullin A.; Pyataev A.; Domracheva N.; Gruzdev M. (2016)

© 2016, Pleiades Publishing, Ltd.The properties of the surface layer of core-shell nanoparticles incorporated into the matrix of macromolecules of 3,4-bis(decyloxybenzoyl) poly(propylene imine) derivative of the second ...

On the application of selective-excitation double Mössbauer spectroscopy to problems in materials science

Pyataev A.; Manapov R. (2010)

Results showing the influence of optical thickness of a scatterer in selective-excitation double Mössbauer spectroscopy are presented on the example of α-Fe and FeBO3. Significant transformation of the spectral γ-radiation ...

Browsing by Author "Pyataev A."

Browsing by Author "Pyataev A."

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